What is a Filter Press?

This post will answer the following questions: What is a filter press and how does it work? We’ll also give you some advice on sizing your equipment (including your feed pump). Our Sales and Service Team is looking forward to answering any other questions you might have.

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Precoat: What It Is and How to Apply in a Filter Press

The effectiveness of an industrial filter press is often judged based on the clarity of the liquid exiting the filter and how fast the liquid can be filtered. An ideal system filters a maximum amount of impurities while at the same time providing minimum restrictions on flow. Adding a precoat to filtration equipment can greatly improve the clarity of the output without sacrificing flow rate.
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What Is a Slant Plate Clarifier?

A slant plate clarifier is used in industrial water treatment applications to provide low cost, yet extremely efficient solids removal from a wide range of waste and process liquids.

The key advantage of slant plate clarifiers over conventional types of clarifiers is the use of a series of inclined plates. These plates are able to provide a large settling area for particles and allow for a more compact footprint, greatly reducing the floor space needed for accomplishing the same result.

In fact, this inclined plate design allows the settling area, or surface area, to be as much as 10 times more than the actual floor space occupied by the clarifier. This significant reduction of the required floor space is achieved by reducing separation between plates to just two inches, and stacking the settling surfaces at an angle. The bottom line advantage to the slant plate design is getting the maximum square footage out of your production floor space, which translates into greater efficiencies and cost savings for your operation. Because the slant plate clarifier uses inclined plates, it is often referred to as an “inclined plate clarifier.” A slant plate clarifier is also referred to as an “SPC.”

M.W. Watermark Slant Plate Clarifier - Space Saving Design; Inclined Plate Clarifier;
Slant Plate Clarifier – Space Saving Design

The reduced required footprint of an SPC provides the opportunity for the clarifier to be located indoors, which allows for better control of ambient conditions. The use of inclined plates also allows the SPC clarifier to operate with flow rates 2 to 5 times that of horizontal clarifiers in a given footprint.

Another advantage worth noting is the SPC’s general absence of moving parts. In many cases, the only mechanical component is the influent pump, which translates into less chance for mechanical failure, a safer environment, and cost savings in energy consumption over traditional clarifiers.

To learn more about how a slant plate clarifier works, click here.

M.W. Watermark - Slant Plate Clarifier System Design; Inclined Plate Clarifier;
Slant Plate Clarifier System Design

What type of industries/applications are clarifiers used for?

Clarifiers are ideally suited for:

-Industrial wastewater solids
-Metal finishing operations
-Chemical processing
-Foundries
-Power plants
-Mining industry fines
-Steel & aluminum plants
-Process water clarification
-Applications which require separation of suspended solids

M.W. Watermark Inclined Plate Clarifiers; Slant Plate Clarifier Series

M.W. Watermark Offers Inclined Plate Design in Slant Plate Clarifier (SPC) Series

As part of our ongoing efforts to make a difference, and provide the most innovative wastewater treatment equipment available, M.W. Watermark is pleased to offer a full line of Slant Plate Clarifier (SPC) products following the highly beneficial inclined plate design.

M.W. Watermark’s Slant Plate Clarifier series is designed to be tough and dependable, while at the same time being sensitive to tight budgets and maximizing production space. We have nine SPC models available, each with increasing capacities, to cover a wide range of design flow needs. Our Slant Plate Clarifier models range from 5 to 400 GPM. Each of our high-quality SPC models is made in the U.S.A. in our facility in Holland, Michigan, by our experienced production team.

 

M.W. Watermark - Slant Plate Clarifier - Top View: Showing flash mixing tank, flocculation tank, and inclined plates;
Slant Plate Clarifier – Top View: Showing flash mixing tank, flocculation tank, and inclined plates
M.W. Watermark - Slant Plate Clarifier Series - SPC-10; inclined plate clarifier;
M.W. Watermark – Slant Plate Clarifier Series – SPC-10

M.W. Watermark Slant Plate Clarifier (SPC) Series – Features Summary:

-Standard sizes from 5 to 400 GPM
-No moving parts
-Compact size minimizes floor space requirements
-Integral flash mixing and flocculation tanks for increased efficiency
-Heavy-duty ¼” steel construction, welds are dye-penetrant tested
-Entire structure is sandblasted and two coats of epoxy is applied – ensuring full coverage and superior chemical resistance
-1/4” PVC removable settling plates
-Dual sludge outlet flanges
-Large side-access hatch
-Sludge sampling ports

Key Takeaway: The M.W. Watermark Slant Plate Clarifier (SPC) series is designed to provide low cost, yet extremely efficient solids removal from a wide range of waste and process liquids.

M.W. Watermark - Slant Plate Clarifier Series - SPC-20; inclined plate clarifier;
M.W. Watermark – Slant Plate Clarifier Series – SPC-20
M.W. Watermark - Slant Plate Clarifier Series - SPC-80; inclined plate clarifier;
M.W. Watermark – Slant Plate Clarifier Series – SPC-80
M.W. Watermark Slant Plate Wastewater Clarifier Series; SPC-150 with Enduroliner™ External Coating
M.W. Watermark – Slant Plate Clarifier Series – SPC-150 with Enduroliner™ External Coating

Visit the M.W. Watermark website to view the full specifications of each clarifier in our SPC product line.

Contact our Sales and Service Team for a quote or to learn more.

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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.

Signs of Wear in Wastewater Treatment Equipment

High-quality filtration equipment is essential to a wide range of industries, from hydraulic fracturing (produced water) to industrial laundry. And while filter presses are ordinarily built to last, everyday use is sure to take a toll on even the toughest machines. That’s why it’s important to look out for signs of wear in wastewater equipment, such as filter presses and clarifiers.

M.W. Watermark Manufactures and Rebuilds Wastewater Treatment Equipment in Holland, Michigan, U.S.A.
M.W. Watermark Manufactures and Rebuilds Wastewater Treatment Equipment in Holland, Michigan, U.S.A.

What Are Some Signs of Wear in Wastewater Treatment Equipment?

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Fastest Growing Filtration Industries and Applications

Three Booming Industries Where Filtration Technology is Playing a Major Role

Industrial filtration technology plays a fundamental role in a diverse range of industries by helping remove solids or other impurities from water and other fluids. But as times change, so too do the industries in which innovative filtration equipment from M.W. Watermark™ can be put to use. Here, we’ll explore a range of up-and-coming industries where we expect our filter presses and other types of water and wastewater treatment equipment to find a home.
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Top Uses for Recycled Wastewater

Across numerous industries, high-quality filtration equipment, like M.W. Watermark’s renowned filter press, is used to treat wastewater before it’s reused. But where exactly might this water go once it’s treated? Here, we’ll explore five common uses for recycled wastewater.

M.W. Watermark - Top 5 Uses for Recycled Wastewater
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How Filtration Equipment Benefits the Mining Industry

To deliver the raw materials many industries depend on, mining companies must generate a substantial volume of wastewater that has the potential to contaminate our soil and water. Fortunately, through the help of filtration equipment, like that produced by M.W. Watermark™, the mining industry has been able to adopt more eco-friendly practices. And beyond filtration’s support for greener mining, the financial and legal benefits of filtration technology can’t be denied. Learn more about some of the top benefits of filtration for the mining industry below.
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Water Filtration and Reuse in the Concrete Industry

Over the past 15 years, M.W. Watermark™ has seen the need for concrete wastewater recycling technologies grow firsthand. As environmental regulations and overheard costs continue to place pressure on ready-mix concrete companies, more and more of them consider wastewater management not just a priority, but a necessity. From cleaning the inside of a concrete truck’s drum to concrete coring, floor polishing, cutting, grinding and more, wastewater treatment equipment, including filter presses, are now being used for numerous applications within the industry.
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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
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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
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Options for Filter Cloth Attachment to Filter Plates

Filter cloths are the foundation to the solid/liquid separation process. It is the filter cloths that allow a filter cake to build up, and the the filter cake itself that ultimately does most of the dewatering. Therefore, it is imperative that the filter cloths are fitting correctly to the filter plates for the best filtration performance from the filter press.

There are two main types of filter plates found in filter presses that require filter cloths to be attached: CGR (Caulked, Gasketed, Recessed Chamber) and NG (Non-Gasketed).

Below we discuss the methods most commonly used for attaching filter cloths to each type of filter plate. (more…)

Warranty On Repaired and Rebuilt Filter Presses




Our new filter presses and clarifiers are known for their superior reliability, durability, and ease of use. We stand behind our new, custom-designed and stock equipment. M.W. Watermark™ also offers used and rebuilt filter presses with a six-month warranty. We are proud to warranty these products and guarantee that all refurbishments completed in our state-of-the art facility include a comprehensive quality control check. The following work is performed when rebuilding used filter presses: (more…)

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
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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
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Filter Press Dewatering Techniques Resulting in a Product

A look at how filter presses are being used across some of the most prevalent industries today

A filter press is commonly used across industries for wastewater treatment to dewater solids prior to disposal. However, in some cases the separated solid or liquid is the actual product.

Below are a few examples in the food, chemical, mining and paper industries where M.W. Watermark has manufactured filter presses to meet this type of customer requirement.

Food Industry

M.W. Watermark 470mm filter press with food grade manifold built for polishing canola and flax seed oils (edible oils).
M.W. Watermark 470mm filter press with food grade manifold built for polishing canola and flax seed oils.(Product is liquid).
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Mobile Filter Press Units for Rental

If portability is a factor in your solid-liquids separation project, then a trailer-mounted filter press from M.W. Watermark™ may be the best option.

Many of our customers have found that a mobile filter press can serve as the ideal choice for dewatering a slurry and managing sludge in a remote location.

M.W. Watermark offers mobile units as part of our rental fleet.
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Filter Presses and Cloths for “Lees Filtration”

How the Filter Press is Used in Winemaking

Filter presses are used for separating solids from liquids across many industries and applications. In the wine industry, the filter press is often referred to as a “lees filter.”

M.W. Watermark 470mm Filter Press Used for Lees Filtration in Winemaking
M.W. Watermark 470mm Filter Press

Lees is the sediment at the bottom of fermentation vessels and includes solids such as grape skins, pulp, stems, seeds and residual yeast. Lees can represent up to 10% of a winery’s total volume, which can be a significant amount in a larger winery. Lees also contain a high percentage of recoverable product, with solids concentrations typically in the range of 20-30%, which lends itself well to dewatering via filter press.

Grapes Used in Winemaking. Source: Wikipedia. Filter Presses and Filter Cloths for Lees Filtration.
Grapes Used in Winemaking. Source: Wikipedia
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M.W. Watermark Filter Presses: Made with Pride in the U.S.A

M.W. Watermark specializes in the design, manufacture and rebuilding of high-quality municipal and industrial water treatment equipment, including filter presses, as well as supplying parts and service to keep the world’s water supply clean and usable for generations to come.

Our facility is located in Holland, Michigan, U.S.A. Working with customers around the globe, we pride ourselves on our ability to provide a quick turnaround time on high-quality equipment and aftermarket parts. Over the years, our business has grown to become the North American leader in filter press manufacturing.

M.W. Watermark Filter Presses with Semi-Automatic Plate Shifters - Manufactured In the U.S.A. M.W. Watermark Filter Presses - Manufactured In the U.S.A.
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How to Determine the Size of Filter Press Needed for Your Application

M.W. Watermark 800mm Filter Press

A filter press is a piece of batch operation, fixed volume equipment ranging from .01-600 cubic feet that separates liquids and solids using pressure filtration. A slurry is pumped into the filter press and dewatered under pressure. (A slurry is a semi-liquid mixture, typically composed of fine particles suspended in water).

A filter press can be used for process, water and wastewater treatment in a variety of industries and applications. In most applications, filter presses are used for dewatering solids prior to disposal. However, in some cases the separated solid or liquid is the actual product.

Because filter presses are used across so many applications, there is no “one size fits all” when it comes to determining filter press sizing requirements.

Fortunately, over the history of commercial businesses and municipalities utilizing filter presses for a multitude of applications, two basic and reliable mathematical formulas have been developed to cover most situations.

The first formula covers most “standard” slurries. The second formula covers slurries composed of metal hydroxides, which are often found in wastewater from metal plating and finishing operations.
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The M.W. Watermark Oil Coalescing Separator Across Industries

The M.W. Watermark™ Oil Coalescing Separator (OCS) is a powerful piece of equipment that can be highly effective across a variety of industries and applications.

Our OCS units are designed to remove free non-emulsified oils, diesel, gasoline and fuels from a waste stream, resulting in an effluent quality of 10 mg/l or less of contaminants 20 microns and larger.

Read on, and we’ll explain a few of the most notable ways in which our customers can employ the M.W. Watermark OCS.

M.W. Watermark Oil Coalescing Separator (OCS); Oil Water Separator
M.W. Watermark Oil Coalescing Separator (OCS)
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Making a Difference in our Workplace with Energy Efficient Lighting

M.W. Watermark team members know that making a difference in the world starts close to home.

Each year, the Watermark leadership team sets enthusiastic goals for community outreach projects, charity work and fundraising. This year, staff members have stepped up to make suggestions on how we can also make a difference right here in our workplace. In fact, one of our engineers, Reed, was interested in researching what we could do to save energy in our daily operations.
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