Industrial Water Filtration System | Heavy Metal Wastewater Treatment Skip to content


Fully Automatic | Batch or Continuous Flow (to 70 GPM) | Reuse or Dispose of Liquid

Clean Water and Dry Solids

1 Micron Filtration for liquid solid separations

The Oberlin Filter removes 99.99% of total suspended solids and discharges them in a dry cake.

  • Wastewater Filtration
  • Sludge De-watering and Heavy Metal Removal
  • Primary Filter Backwash, Clarifier Overflows and Underflows
  • Provides a Solids Free Feed for Carbon Bed and Membrane Filters

Oberlin Filter solves a large variety of Water-Solid separation problems so our customers can reach the strict requirements of SEWAGE DISCHARGE LIMITS. Its fully automatic features and simple design deliver both dry solids and clean water with minimal operator contact, minimizing exposure to hazardous materials.

The Oberlin Filter can remove solids down to 1 micron and is used in a wide range of wastewater applications ranging from removing heavy metals to sludge dewatering.  The processed water is clean enough for reuse or discharge.  We operate in challenging applications with high solids, high corrosion and high temperatures. 

Oberlin Filter supplies complete system packages and we offer continuing technical support to ensure that you are getting optimal results for your water filtration.  Our completely integrated operation includes lab, design and engineering, prototyping, manufacturing with total quality control, startup and testing. 

Clean Water

Here you’ll find two charts showing how effectively we removed heavy metals from wastewater.  The first shows before and after results for low-level radioactive wastewater from a plant that produced nuclear materials for the U.S. Department of Energy. The second shows before and after results for a battery manufacturer that had wastewater contaminated with lead, zinc and copper. In both examples, the filtrate from the Oberlin Filter was well below the discharge limits. 

Dry Solids

The Oberlin Filter provides extremely dry solids that automatically discharge from the filter.  No further dewatering is necessary. The solids are dry and ready for landfill disposal. The solids will pass Toxicity Characteristic Leaching Procedure (TCLP) test. 

Typical cake dryness, by weight are shown below.

Percent Dryness Solids Type

  • 75%-95% Crystalline and Rigid Shaped Particles
  • 45%-65% Diatomaceous Earth and Filter Aid Backwashes
  • 30%-40% Metal Hydroxides


At Oberlin, we're dedicated to providing not just any solution, but the best one for you. Provide a sample of your contaminated process fluid to us. We'll come back with a test report, showing our ability to ensure the cleanest fluid and the highest return on investment for your operations.

Dry cake discharging from the Oberlin Filter at a power plant.

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This shows the Oberlin Filter’s ability to remove a variety of substances. The brown substance is magnesium the white is salt. The filter is working with a crystalizer and is the final process step in their Zero Liquid Discharge program.

“The Oberlin Automatic Pressure Filter(APF) is unique in the industry since it’s simple, automatic, and can use disposable filter media for the same capacity cycle after cycle. It can be manufactured from many materials of construction to meet the most corrosive environments. It can also handle almost any solids loading and can accommodate in-line filter aid or polymer flocculant addition for enhanced separation efficiency. These are some of the reasons that more than 60 units have been installed in DuPont on a variety of applications including wastewater, recycle water clarification. nuclear waste treatment, and metals recovery.”

Dr. Ernest Mayer

Dr. Mayer was a Senior Level Consultant specializing in Solid and Liquid Separation (SLS) technology beginning in 1980. His work with the DuPont Company of Wilmington, Delaware spanned 40 years. Holding two patents and having published more than two hundred papers, Dr. Mayer is listed in Who’s Who in Science and Environmental Technology and Co-chaired the World Filtration Congress in 2004.

Before & After Wastewater Filtration

The sequence of the video is:

  1. Before and after samples with TSS and dry solids
  2. A tank of wastewater
  3. Clean water coming out of the filter
  4. Dry cake of solids coming out of the filter
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Oberlin Filter Wastewater Filter with Filter Aid Addition System

This video shows the Oberlin Filter with a filter aid addition system. In some applications, it is desired or required to use a filter aid to assist with filtration. As an option, Oberlin offers an automated system to add the filter aid at the proper dosage. The filter aid is then removed along with the contaminants, achieving filtration to below the 1 micron level. AS a final step to each filtration cycle, the solids are dried by passing air through them. The filtered solids are discharged into a bin as a dry cake. The operator is not required to open the filter to clean out or remove any solids. This greatly reduces labor costs and exposure to hazardous materials.

Two Oberlin OPF 50 Filters

Large Volumes Compact Size

One thing that sets the Oberlin Filter apart is its ability to process an enormous volume of water in a very compact size. With a footprint of only 14.5 ft long by 10.33 ft wide by 9 ft high, a single OPF 50 can process 2.8 million gallons of water in a day (application dependent). The Oberlin Filter comes in a variety of sizes, from 1 to 50 ft2. Our engineers can design a system to suit the capacity of your flow requirements whether it be large or small.

The OPF 50 Filter
14.5ft long x 10.33ft wide x 9ft high
2.8 million gallons a day

Wastewater Filtration

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