Effects of Wastewater on the Environment

How Wastewater Can Harm the Environment

M.W. Watermark™ is passionate about keeping our planet’s water supply clean and usable. That’s why we dedicate ourselves to creating powerful water and wastewater treatment equipment. When wastewater gets dumped into waterways before it’s been properly treated, it can have devastating and lasting effects on the environment. Fortunately, government regulations, like the Clean Water Act, have helped keep wastewater pollution under control over the past several decades.

M.W. Watermark - Effects of Wastewater on the Environment

What is Wastewater Composed of?

Wastewater is a byproduct of industrial processing. Virtually all industries produce some type of wastewater, including the mining, oil and gas, stone fabrication and concrete industries. Depending on what’s being made or done, water might be used for cooling, transporting, washing, diluting or fabricating products. Those products continue on through the cycle, while the now dirty water, or effluent, gets left behind.

This water essentially turns into liquid waste. As a result of the processing it had to go through, it may contain any number of harmful substances. The composition of wastewater varies from one manufacturer to the next, but in general, here are some common things it might contain.

  • Heavy metals
  • Toxic chemicals
  • Oil and grease
  • Solids
  • Sludge
  • Organic and inorganic materials

As you might imagine, this effluent poses numerous hazards for humans, animals and the environment as a whole. It can be toxic, corrosive, reactive, acidic and ignitable, and accordingly it must undergo treatment before being reused or redirected into the water supply.

M.W. Watermark - Effects of Wastewater on the Environment

Dangerous Wastewater Effects

Waterways are generally most at risk to the harmful effects of wastewater. Toxic compounds in the effluent can seriously disrupt aquatic ecosystems. For example, if a large amount of biodegradable substances end up in the water, organisms will start to break them down. This is a bad thing, because when they do, these organisms use a lot of dissolved oxygen. Dissolved oxygen is critical for marine life to thrive. As it becomes depleted, fish can be impacted in life-threatening ways.

Other types of waste, like oil and grease, are harder to break down and can settle on the surface of the water. This blocks light, which photosynthetic aquatic plants need. It can also suffocate fish and get caught in birds’ feathers.

And just as heavy metals, such as lead and mercury, are toxic to humans, they’re also toxic to animals. If someone drank from or ate fish from a contaminated water source, they could be faced with serious health effects. The same is true for the animals and plants living in the water.

Other Harmful Characteristics of Effluent

When untreated wastewater gets dumped, it’s often warm or even hot. In these cases, it can elevate the temperature of the water, which further disrupts the ecosystem. Fish are cold blooded, so they rely on the water to regulate their own body temperature. If the water is too warm, it can increase respiration, feeding and movement. Additionally, the temperature of the water also affects the amount of oxygen in it.

Help Us Make a Difference

If you need to follow federal wastewater regulations and protect the environment from the damaging effects of effluent, make sure you’re using effective wastewater treatment equipment at your facility. We can design and build a custom filter press tailored to your specific solid-liquid separation needs. Give us a call at 616-399-8850 or fill out our online contact form to find out more. In the meantime, you’re welcome to look through our Filter Press Product Brochure.

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About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2019 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

Advantages of Mobile Filter Presses

Considering a Trailer-Mounted Filter Press?

Here are a Few of the Benefits…

At M.W. Watermark™, we strive to accommodate the unique needs of our customers and their jobsites. That’s why we make custom filter presses with many optional features. One of those optional features is portability. When customers come to us looking for something that can be easily moved from one location to the next, we immediately recommend our mobile filter press units – for purchase or rental. They’re just as capable of filtering large amounts at high speeds as any of our filter presses, but they have the added benefit of being able to do it in remote locations.

M.W. Watermark 1,200 mm Mobile Trailer-Mounted Filter Press
M.W. Watermark 1,200 mm Mobile Trailer-Mounted Filter Press

Who Needs a Mobile Filter Press?

In most cases, the process of water treatment or dewatering slurry takes place inside a facility. Many industries rely on filtration every day to keep operations running smoothly. So it only makes sense that their filter press becomes a permanent fixture that they can use whenever they need to.

However, that’s not how it works in every situation. Some businesses, particularly in the oil, gas and fracking industries, are not working out of a facility or warehouse. Instead, they’re out on remote sites in open fields, desert plains and oceans as they drill, mine and build. They need a filter press that can go on location with them to help speed up the process. Furthermore, companies like these don’t stay at a single location. They’re moving from jobsite to jobsite, taking all their equipment and machinery with them as they go.

Aside from that, mobile filter presses are also well-suited for short-term projects. It’s easier to move the filter press in and out as needed when it’s mounted to wheels. They’re also helpful for manufacturers that need to filter several tanks at once. Instead of having to install multiple filter presses, they can just get one and move it from tank to tank.

Mobile Filter Press Features

Our mobile filter presses are mounted on a trailer during the manufacturing process. Trailer-mounted filter presses are ideal for dewatering slurry and managing sludge remotely. M.W. Watermark offers rentals that arrive assembled, equipped with the specs you need and ready to go.

For example, our mobile filter presses are outfitted with flexible side curtains to give you easy access to the equipment during operation. They also have independently adjustable levelers. A cake chute system, which is constructed from high-quality stainless steel, directs all discharge onto the extendable slider belt conveyor.

Other features of our trailer-mounted presses include a fully electrical control panel and a water wash-down deck. Mounted overhead lighting keeps the area well-lit for use through the night. And finally, they also come with walkways, safety railings and stairs to help keep workers safe.

Find the Right Filter Press for Your Needs

Whether you need a mobile filter press or a permanent model, turn to M.W. Watermark. We have filter presses available in many different sizes with a variety of plate dimensions, ranging from 250 mm to 1,500 mm. We also offer options including manual, semi-automatic or automatic plate shifting. Browse our filter press brochure to see all the specs and customizable options we have to offer. If you’re ready to place an order or have any questions, call 616-399-8850 for a quick response.

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About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2019 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

Filter Cloths 101: Common Terms

The Important Role of Filter Cloths in Building a Filter Cake

Filter cloths play a critical role in the filter press dewatering process, serving as the foundation needed to build a filter cake. How is this accomplished?

A filter press is actually a depth filter, which as the name suggests, collects particles throughout the filter medium instead of just on the surface. Cake formation is a unique benefit of a filter press, as it allows for particles to continue to build on the cloth without sacrificing quality of filtration. As the cake builds on the cloth, the filtration of finer particles actually improves, allowing for the separation of particles much smaller than the openings in the filter cloth itself.

Now that we have discussed the importance of filter cloths in the functioning of a filter press, the purpose of the remainder of this blog is to provide an overview of some of the most common terms used when discussing filter cloths, regardless of industry or application.

M.W. Watermark Manufactures Custom Filter Cloths for Your Filter Press

Common Filter Cloth Terms

Cloth Blinding

When a cloth’s porosity is hindered, and the cloth no longer allows the filtrate to flow.

Monofilament Cloth

These fibers are single, smooth, rounded extrusions. “Mono” cloths have excellent cake release characteristics and resistance to blinding. This style has low particle retention. To provide a layman’s visual, this material is very similar to fishing line. These cloths have the advantage of being more permeable, allowing for higher flow rates.

Monofilament fabric also has advantages in cleaning, which can help deter microbiological contamination in food and beverage applications.

The only drawback to monofilament cloths is in their durability. Because these cloths are woven from individual strands instead of multiple fibers woven together they are more fragile, and a crack in a single strand can compromise the stability of the entire cloth.

M.W. Watermark Monofilament Filter Press Cloth
Click Image to Enlarge
Multifilament or “Spun” Fibers

Compared to the “mono” fiber above being similar to fishing line, with “multifilament” threads, think “yarn.” The fibers vary in size, but are grouped together in a single strand. Multifilament fibers feature good particle retention and are very durable, since a break in a single thread has very little impact on the overall stability of the cloth.

M.W. Watermark Multifilament Filter Press Cloth
Click Image to Enlarge
Mono-Multi Cloth

Mono-Multifilament fabrics have become very popular, as they combine the benefits of both “mono” and “multi” to get the best of both worlds. That is, the excellent cake release, higher flow rates and ease of cleaning of monofilament, plus the durability of multifilament fibers.

Because of these combined characteristics, mono-multi filter cloth has been found to be ideal for “lees filtration,” a solid-liquid separation process used in winemaking.

M.W. Watermark Mono-Multi Filter Press Cloth
Click Image to Enlarge
CGR vs. NG

“CGR” is an acronym for “Caulked, Gasketed, Recessed chamber.” CGR plates should provide a virtually leak-proof filter press. Cloths for these plates are octagon shaped, with a caulking rope or cord sewn into the edge of the cloth. “NG” means “Non-Gasketed.” The NG cloth is faster and simpler to install, though the trade off is that occasionally some dripping can happen when using NG cloths.

Latex Edging

A latex coating can be added to the edges of an NG cloth to help prevent leaks.

M.W. Watermark Filter Cloths - Latex Edging

CFM

“Cubic Feet per Minute” is the measure of flow or air permeability of the cloth media.

Warp and Weft

Warp is the threads that run lengthwise in a cloth. Weft is the threads that run across the width of a cloth at right angles to the warp. These are also known as filling threads. Warp should run vertically when installed.

Weave Pattern

The most common are plain, twill, and satin (or sateen).

  • Plain Weave is average in strength, cake release, and stability.
  • Twill Weave adds a diagonal rib or line to the weave, adding strength at the expense of a little stability. Cake release is average.
  • Satin Weave is popular for its excellent cake release and excellent resistance to blinding.

Additional Online Resources

Visit our Filter Cloths 101 webpage for more information, including FAQ’s and cloth installation videos.

Or, visit our Filter Cloths main product page to download our product guide.

Contact Us Today

Contact a member of our Sales and Service Team to discuss your particular filter press application.

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About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2019 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

Recycling Wastewater in Stone Finishing

For industries like stone fabrication and mining that generate massive volumes of wastewater, recycling becomes critical. As we’ve learned from companies that failed to reuse wastewater in the past, it’s all too easy for the threat of legal and environmental consequences to become a reality. Luckily, M.W. Watermark™ can provide the wastewater equipment and solutions these industries need in order to avoid the legal, environmental and other issues that arise from a failure to recycle wastewater. Read on to learn more about the top three consequences of unrecycled wastewater from stone finishing, mining and other similar projects.

M.W. Watermark Filter Presses and Other Wastewater Treatment Equipment for Stone Cutting, Grinding and Finishing Water Recycling

1. Increased Risk of Pollutants

If wastewater isn’t properly treated and recycled, it could mean that harmful contaminants are being introduced into the environment. These projects can produce sludge with heavy metals and wastewater containing flammable liquids, corrosive liquids, cyanide and other pollutants, all of which pose significant risks for the environment and public health when introduced to drinking and/or surface water.

2. Depletion of Finite Water Resources

Water is a finite resource, and recycling can help conserve it – especially when large volumes of water are necessary to do business. In fact, most fabrication shops require 15,000 to over 200,000 gallons of water each day, while mining operations can demand millions of gallons of water daily. And this volume of water usage isn’t just costly for the environment – it can also result in extremely high operating costs. With help from wastewater treatment equipment, like filter presses, facilities can reuse water to minimize environmental impact and cut costs.

3. Possibility of Costly Penalties

In order to enforce wastewater regulations, the EPA and other governing bodies issue serious fines for violations. Companies who fail to properly manage their wastewater can expect expensive lawsuits that not only cut into profits, but also do serious damage to their reputation. With reliable recycling and treatment systems in place, however, it’s easier to ensure compliance that will prevent expensive fines and establish your business’s commitment to greener practices.

Consult the Industrial Filtration Experts

At M.W. Watermark, we specialize in helping a wide variety of industries manage and recycle their wastewater through industrial filtration solutions like filter presses, clarifiers and more. So whether you’re looking for new solutions or want to upgrade your current equipment, contact us today by either completing our quick online request form, or by giving us a call at 616-399-8850.

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About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2019 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

Wastewater Contaminants in the Food Industry

While most industries must find solutions for the problem of wastewater production, the food industry is consistently one of the top sources for industrial wastewater. Not only is a large volume of wastewater generated by the production and processing of food, but this water typically contains a high contaminant load that could potentially damage receiving waters, such as nearby rivers, lakes and streams. Additionally, there are many contaminant variables within the food industry, from dairy production to oil and fat processing, which pose unique challenges for wastewater treatment.

To ensure all pollutants of concern (POC) are removed from food industry wastewater before its discharge, M.W. Watermark™ is prepared to help with our line of wastewater treatment equipment and technology.

Filter presses are used for food production wastewater treatment, including egg production

Contaminants in Food Wastewater

One of the major problems with food wastewater is that it often has a high biochemical oxygen demand (BOD) and high chemical oxygen demand (COD). BOD and COD are measurements of how much decomposable organic material wastewater contains. While some food waste is decomposable, such as carbohydrates produced from fruit and vegetable processing, much of it is not. This means the wastewater typically requires treatment before it can be discharged.

That’s because if the BOD or COD is too high, as predetermined by the EPA and local municipalities, the receiving body of water may experience a negative impact. In addition, food wastewater contains a number of nutrients, organic matter, nitrogenous compounds, inorganics and solid residues that require the wastewater to be treated.

Agricultural Wastewater Contaminants

Agriculture is another major contributor to the food industry’s wastewater. It usually comes from one of two sources: irrigation runoff and fruit and vegetable processing. Depending on the source, the wastewater may contain high amounts of sediment, pesticides, nitrogen and phosphorous pollutants, animal waste and more. In order to protect the ecosystem of nearby bodies of water, this wastewater also needs to be effectively treated and, in many cases, recycled.

M.W. Watermark 800mm filter press with semi-automatic plate shifter. Application: Egg production wastewater; Food industry wastewater treatment
M.W. Watermark 800mm filter press with semi-automatic plate shifter. Application: Egg production wastewater.

Wastewater Treatment Equipment for the Food Industry

M.W. Watermark designs and manufactures wastewater treatment equipment for the food industry’s unique needs. Our selection of filter presses and other products can help you comply with regulations, minimize your impact on the environment and even boost the efficiency of your operations. Contact us today to see how we can help your company.

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About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2019 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

How to Select the Proper Filter Cloth for Your Application

Filter Press Cloths – Overview

Filter cloths come in many shapes, sizes and fabric types. Filtration results can vary depending on the type of cloth being used.

Shown below is a typical Non-Gasketed (NG) design cloth on top along with a Gasketed (CGR) design cloth on the bottom.

M.W. Watermark Non-Gasketed and CGR Filter Cloths; Filter Cloth Selection Process

M.W. Watermark manufactures these designs along with others like the drape over, half cloth, backing cloth and most other types.

Matching the most appropriate filter cloths for a given project requires knowledge of the design needed as well as the process application.

Filter Cloth Selection

Determining the proper cloth construction requires knowledge of the slurry characteristics and the filtration requirements. Below are some of the factors we consider in the filter cloth selection process.

Contact M.W. Watermark to learn more about how to identify or measure these variables.

  • Is the cake or the filtrate a product?
  • pH?
  • Slurry temperature?
  • Slurry particle size?
  • Is the slurry preconditioned (Polymer, DE, Ferric, Lime, etc.)?
  • Abrasive, coarse particles?
  • Existence of solvents, oils or greases?
  • Number of filtration cycles per day?

The above data helps in determining the following:

  • Fabric raw materials / compatibilities
  • Type of yarn (fibers)
  • Fabric weave
  • The type of fabric finishing needed to produce the best filter cloth for the application

Materials / Compatibles Chart

M.W. Watermark Filter Cloth Materials and Compatibles; Filter Cloth Selection Process

Filter Cloth Fiber Types

Filter cloths are manufactured using synthetic fibers.

  • Monofilament: Single, smooth, continuous extrusion. Highest flow rates, good resistance to blinding, good abrasion and scaling resistance. Fibers are typically between 4 mil and 10 mil (.004″ to .01″) in diameter. Best cake release.
    M.W. Watermark - Monofilament Filter Cloth Fiber; Filter Cloth Selection Process
  • Multifilament: Multiple continuous fibers twisted together to form one yarn. Excellent retention for smaller particles. Good cake release.
    M.W. Watermark - Multifilament Filter Cloth Fiber; Filter Cloth Selection Process
  • Staple (Spun): Short lengths of fibers (similar in appearance to cotton) spun into a yarn. Tends to have a “hairy” appearance. Best solids retention. Poorest cake release.
    M.W. Watermark - Staple Spun Filter Cloth Fiber; Filter Cloth Selection Process

Filter Cloth Fabric Weaves

  • Satin: Smooth surface for excellent cake release and resistance to scaling and blinding.
    M.W. Watermark - Satin Filter Cloth Weave; Filter Cloth Selection Process
  • Twill: Shown with multifilament yarns. Somewhat smooth surface with good cake release. Excellent filtration of fine particles. Flexible fabric.
    M.W. Watermark - Twill Filter Cloth Weave; Filter Cloth Selection Process
  • Plain: Very tight weave. Excellent filtration of fine particles. Good cake release.
    M.W. Watermark - Plain Filter Cloth Weave; Filter Cloth Selection Process

Fabric Finishing

Finishing of the fabric enhances the cake release, filtration quality and stability.

  • Singeing: Removal of fibers on the surface of staple and felt fabrics to enhance cake release.
  • Calendaring: With use of heated compression rolls, the fabric is “melted” to adjust the permeability and provide a smoother surface for cake release.
  • Heat Setting: Through a wet or dry process to create a dimensional stable fabric that will not shrink, stretch, etc.

Visit our Filter Cloths 101 & FAQ webpage for more information.

Contact M.W. Watermark to discuss your particular application.

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About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2019 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

Evaluating Worn or Damaged Filter Plates

Filter plates are among the most important components of a filter press. To maintain peak levels of efficiency and avoid failure, the plates need to be inspected regularly for signs of wear or damage. To help you evaluate the state of your plates, M.W. Watermark™ offers some advice below. If you have any questions about a specific model or problem, contact one of our factory-trained service technicians for personalized assistance.

M.W. Watermark Keeps a Widely-Stocked Warehouse of Polypropylene Filter Plates In-House for Quick Shipping
M.W. Watermark Keeps a Widely-Stocked Warehouse of Polypropylene Filter Plates In-House for Quick Shipping

Identifying Potential Problems

In industrial settings, filter plates have to work through highly demanding conditions. While they’re designed to withstand high pressure and large volumes, over time, breakage and malfunctions can occur. When evaluating your filter press plates, one of the first things to look for is if they’re clean. They need to be cleaned thoroughly on all sides, especially the bottoms, and frequently, as dirty plates can cause inefficiencies and even catastrophic sidebar failure.

Next, you’ll want to check the components. If everything looks good and appears to be functioning properly, then no further action is required. Some of the most common part failures include the filter cloth and gasket. Filter cloths are prone to holes caused by abrasive sand, gravel and other particles. When holes appear, the aggregate flowing into the discharge can wear down the plastic on the discharge eyes of the plates.

Leaking is another common concern with filter plates. Some types of plates, like CGR (Caulked, Gasketed, Recessed Chamber) plates are designed to be virtually leak-proof. So if you spot some dripping, it could be a sign repairs are needed. With other types of plates, however, a little leakage may be normal.

Addressing the Issues

If you find that your filter plates are no longer performing at their peak condition, turn to M.W. Watermark for help. Not only do we supply maintenance and installation tools to perform repairs, but we also offer free video tutorials for some common “how to” topics. As always, we have factory-trained service technicians on standby to offer advice.

Additionally, if you need to replace your filter plates, we keep a large stock of polypropylene plates in-house and ready to ship, so you don’t have to worry about downtime. Or, you’re welcome to put in a custom request for specific dimensions or configurations.

Get Back Up and Running

If you have any questions about evaluating the condition of your filter plates or would like a quote, contact the team at M.W. Watermark today. You can reach us by calling 616-399-8850 or by submitting our online form.

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About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2019 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

Common Filter Press "Filtering" Issues and Solutions

Are You Experiencing Any of These Common “Filtering” Issues?

Cake Sticking to the Filter Cloths

This can cause excessive time to discharge the filter cake. Debris causing more frequent filter cloth washing can lead to the need to change the cloths more often.

Poor Filtrate and/or Filter Cake Quality

Poor filtrate can cause non-compliance with local water authorities. If the filtrate is the product, this can cause issues requiring additional filtration. Poor cake solids (too much moisture) can also cause the cake to stick to the cloths, increasing disposal costs. If the cake is a product, this condition may require extra time for drying.

Poor quality filter press cake
Poor Quality Filter Cake
Ideal filter press cake: Firm, fudge-like slabs
Ideal Filter Cake: Firm, Fudge-Like Slabs
Cake Build-Up Inside the Feed Port (Core) of the Filter Plate

Excess core buildup slows the cake discharging process, as each filter plate core will need to be cleaned prior to shifting the next plate (even if the filter cake discharges completely). If not properly cleaned, this can lead to filtration issues on the next filtration cycle.

Holes Developing in the Filter Cloths

Holes cause the effluent to be cloudy and can cause filtration time to become extended.

M.W. Watermark™ is Your Go-To Resource for Filter Press Solutions

M.W. Watermark can help you resolve these filter press “filtering” issues and others as well.

In addition to manufacturing custom filter cloths, M.W. Watermark also designs, manufactures and services industrial filtration equipment including filter presses, clarifiers, oil coalescing separators and more.

M.W. Watermark is a leading filter press manufacturer
M.W. Watermark is a Leading Filter Press Manufacturer

M.W. Watermark’s Sales and Service Team members have the upfront knowledge to determine if your issue can be resolved by simply changing the type of filter cloth fabric being used, or if there is also a mechanical or chemical solution that should be implemented.

We pride ourselves on being able to solve the problem in a manner that works best for the customer.

M.W. Watermark Non-Gasketed Filter Press Cloths - Ready for Installation
M.W. Watermark Non-Gasketed Filter Cloths – Ready for Installation

Potential Filter Cloth Solutions / Troubleshooting Options

Air Permeability Testing

In our dewaterability laboratory, we can test your cloth both as received, and then after a pressure or chemical wash, to determine blinding solutions.

M.W. Watermark Air Permeability Testing; Filter Press Solutions
M.W. Watermark Air Permeability Testing Station
Your Filter Cloth Material May Need Changing

Polypropylene has become a popular fabric for the majority of filter press applications due to its high strength and excellent resistance to most acids and alkalis. However, there are now alternative fabric choices to help with especially challenging slurries, such as those that are highly abrasive.

Polypropylene Filter Cloth
Polypropylene Filter Cloth (Click to Enlarge)

For example, polyamide (nylon) offers a unique non-blinding, abrasion resistant and hydrophobic alternative to the conventional polypropylene and polyester fabrics, and may be more appropriate for certain applications.

In many cases, this fabric will last longer and require less cleaning – thus increasing the efficiency of the filter press operation.

We also offer highly calendared polypropylene cloths that offer similar benefits.

Fabric Permeability

Depending on the application, we can offer the best fabric permeability to maximize filtration efficiency.

Our fabrics range in permeability from .1 cfm to 100 cfm.

M.W. Watermark Air Permeability Testing - Laboratory Services; Filter Press Solutions

Weight of the Fabric

The weight of the fabric is typically proportional to its srength, which in turn affects the life of the filter cloth.

Larger equipment tends to require heavier weight fabrics.

Our range is 9 oz./sq. yd. to 20 oz./sq. yd. This range covers most filter press requirements.

Construction of the Filter Cloths

Filter cloth construction can be modified to better solve the issue at hand.

This can include the addition of hook and loop material to the top and/or side of the cloths for a better fit.

M.W. Watermark Rubber Barrel Neck Filter Cloth with Hook and Loop Material for a Better Fit; Filter Press Solutions

Addition of Rubber Barrel Necks

Rubber barrel necks are sometimes needed in the center of the pull-through to stop filtration in this area from occurring – and to offer better abrasion resistance.

M.W. Watermark Rubber Barrel Neck Filter Cloth; Filter Press Solutions

Contact M.W. Watermark to discuss your filter press “filtering” challenges with our Sales and Service Team.

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About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2019 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

Produced Water: Understanding Fracture Fluid

A Closer Look at the Fluid Utilized in Hydraulic Fracturing

Fracture fluid is used during hydraulic fracturing to create thin hairline fissures in shale rock, through which natural oil and gas can be extracted. This fluid is often a mixture of water, sand and additives specially formulated to keep the cracks open and to transport the proppant successfully. Eventually, this fluid makes its way back to the surface, bringing several contaminants with it. From there, it can be either recycled with the help of filtration equipment from M.W. Watermark™, or disposed of in an environmentally safe way.

M.W. Watermark Manufactures Filter Presses Used in Hydraulic Fracturing Operations; Fracking; Produced Water; Flowback Water; Fracture Fluid

Composition of Fracture Fluid

While the composition of fracture fluid may vary based on the characteristics of the formation, objectives and other factors, it’s typically made of 99% water and sand. The sand helps keep the cracks open. However, it’s also important to keep the wellbore lubricated during this process so that components are pumped to the surface faster, so additional chemicals are added to the mix for enhanced viscosity. Common additives include guar gum, which helps thicken the water to suspend the sand, and surfactant, which is similar to dish soap.

In some cases, unconventional fracturing fluid may be used, such as non-aqueous systems that are oil-based or methanol-based. Every component of the fluid mixture is selected to maximize productivity of the specific hydraulic fracturing operation.

Flowback and Produced Fracture Fluid

While some of the fracture fluid gets absorbed into the rock, about 20-40% of it returns to the surface. It may carry minerals, salt, residue and other contaminants from the ground – in addition to the original fluid additives – with it. When this occurs, the fluid is considered produced water. On any given fracking operation, there can be thousands of gallons of this produced water that companies have to manage. At this point, a filter press can be used to help separate solids from the water so that it can be reused.

M.W. Watermark 1200mm Trailer-Mounted Filter Press Built for Produced Water Recovery; Fracking; Hydraulic Fracturing; Fracture Fluid
M.W. Watermark 1200mm Trailer-Mounted Filter Press Built for Produced Water Recovery

Get Custom-Built Fracking Filtration Equipment

When mining and fracking companies require special filtration equipment to keep their operations clean and efficient, they turn to M.W. Watermark. We specialize in providing custom wastewater treatment solutions, such as filter presses, to suit your specific application. Contact us today to request a quote.

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About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2019 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

 

Mining Filter Plates: Repair vs. Replace

Should You Repair or Replace Your Mining Filter Plates?

A functioning filter press is absolutely essential for the mining of metallic ores and precious metals. If even one component, like the filter plates, isn’t working correctly, contaminants can be allowed to enter our supply of fresh, clean water and soil. These contaminants may include everything from heavy metals and acids to salt and oils, all of which can lead to serious environmental and health consequences. So if an issue does arise with the filter plates, it’s important to address it quickly and correctly.

M.W. Watermark™ offers a wide range of knowledge and expertise on filter press technology and is one of the leading suppliers of filter press plates and other parts. Here are some tips on how to decide whether you should repair or replace your mining filter plates.

M.W. Watermark Offers Mining Filter Plate Repair and Replacement for Filter Presses in the Mining Industry

When to Repair

Because filter plates have to filter substantial amounts of mining slurry, they’re prone to wear and breakage. That’s why they need to be inspected and maintained on a regular basis. Cleaning, in particular, is vital to keeping the filter press in peak condition. Over time, solids deposit on filter plate drainage surfaces and within filtrate porting. Operation with worn feed devices and torn cloths exasperate this problem. Dirty plates decrease throughput by lengthening filtration times. Up-time also decreases as the deposited solids promote differential pressures within the plate stack that break filter plates.

If you’re experiencing issues with your filter plates, they may just need to be power washed. However, there could be a broken or worn component that needs to be repaired or replaced, like a filter cloth or gasket. If that’s the case, M.W. Watermark can help you troubleshoot and make basic repairs on-site. Check out our free online video tutorials and stock up on any maintenance or installation supplies you may need.

M.W. Watermark offers filter plate repair services or replacement plates for filter presses in the mining industry.
M.W. Watermark offers filter plate repair services or replacement plates for filter presses in the mining industry.

M.W. Watermark Offers Filter Plate Repair Services

However, since mining applications are particularly tough on filter plates, some of the plates in the press may eventually need to be serviced. This is where M.W. Watermark’s filter plate repair services can help you save money before replacement becomes necessary. Our repair services include cleaning, plastic welding, and replacement of filter plate components such as diaphragms (membranes), seals and gaskets, air blow deflectors, slide blocks/rollers, and more. We can even rebuild or replace the handles on your plates.

M.W. Watermark offers repair services for filter plates from filter presses in the mining industry.
This mining filter plate has been repaired using natural-colored polypropylene for the welds.

When to Replace

Filter plates with severe issues or those that are simply too worn out may need to be replaced. It helps to keep spare plates on hand for instances like this in order to avert serious downtime. But if you do need to order new plates, Watermark can supply filter plates for many makes and models of filter presses, including Metso® (Sala®), Ishigaki® (Lasta®), Outotec® (Larox®), and FLSmidth® (Eimco®) as well as others.

M.W. Watermark Offers Filter Plate Repair Services or Replacement for Filter Presses in the Mining IndustryContact M.W. Watermark

M.W. Watermark is here to help with all your filter press maintenance and service needs. Contact us to speak directly with one of our factory-trained service technicians or to get a quote for spare parts.

 

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About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2019 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.