Skip to content
Menu Close
Home News Clara Filter – High-Flow, High-Load Stormwater Filtration

Clara Filter – High-Flow, High-Load Stormwater Filtration

Is your industrial facility close to the benchmarks?  Do you want an added measure of certainty to be in compliance with your industrial general stormwater permit?  Is your industrial facility unpaved or does it have broken pavement that is affecting your stormwater quality?  Does your permit require corrective actions?  Or is the facility large and you’d like to incorporate end-of-pipe stormwater treatment that doesn’t break the bank?  If you can relate to any of these questions, StormwateRx now has an answer in the form of a new, high-performance version of its classic Clara® separator. Called Clara® Filter, this new system is ideal for high-flow or high solids-loading stormwater treatment applications. While Clara Separator produces excellent removal of floatable hydrocarbons, and settleable solids such as sand and grit, Clara Filter captures finer solids, particulate metals and neutral buoyancy trash and debris, while retaining the ability to trap hydrocarbons at a high flow rate. StormwateRx developed Clara Filter, a patent-pending, passive high-rate media filter in a concrete structure that can serve as standalone treatment or as a pretreatment BMP for sites with high total suspended solids (TSS) loading and frequent high-flow stormwater events.

Why is Clara Filter superior for this application? Its media is formulated for high-flow and high solids retention capacity and to remove free oil. Typical total suspended solids (TSS) removal by Clara Filter is greater than 70%, with demonstrated reduction of up to 90%. The system operates by gravity—no power and no mechanical or moving parts are present to malfunction. The filtration media traps particulates as the stormwater flows through the filter’s circuitous pathway.  The larger pore spaces and media consistency allows a greater volume of stormwater to pass through the unit than can be processed by other filtration technologies. The unit’s filtration media is housed in a large-volume concrete vault with filtration chamber access through manhole or hatch openings. An integrated pump system to discharge to a downstream polishing filter is also available as an option.

Clara Filter effectively reduces TSS and fine particulate from high flow applications or to other downstream treatment BMPs. This can help extend maintenance intervals, reduce media replacement costs and help your downstream filtration treatment system operate at peak efficiency to reduce a broad range of industrial stormwater pollutants, helping you meet benchmarks. Clara Filter is another way StormwateRx keeps you focused on what matters most—efficient, cost-effective and compliant facility operations.

Find out more about Clara Filter.

Continue Reading

A pile of gravel and refuse sits in a processing facility

Difficulty With Accurate Testing For BOD In Industrial Stormwater Runoff

Biochemical oxygen demand (BOD) is a measure of the amount of dissolved oxygen used by microorganisms to break down organic material in a sample of water. Because BOD is not one specific pollutant, it can be difficult to characterize the nature of BOD, identify the source in stormwater runoff, and select the appropriate treatment approach to reduce BOD in stormwater runoff and discharge. The most effective way to minimize BOD concentrations in stormwater discharges will be to minimize the exposure of stormwater to materials that are a source of BOD. 

Woman filling glass with water from tap in kitchen, closeup

What is PFAS?

PFOA (perfluorooctanic acid) and PFOS (perflurooctane sulfonate) are organic synthetic chemicals that have been used in manufacturing a multitude of industrial and consumer-based products including coatings, carpeting, and fire-fighting foams. Over several decades, they have contaminated the environment, specifically our drinking water sources, causing significant health concerns that recently prompted the EPA to take action.

Close-up of black activated carbon texture. Coconut charcoal.

What is Activated Carbon?

Although the term granular activated carbon is used generically, it can refer to dozens of similar – but not identical- adsorbents. Depending on raw material, method and degree of activation and other factors, activated carbons can perform differently in various applications.

Close