Hydrokleen Products Index

Hydrokleen Wastewater Recycling & Pre-Treatment Systems

Hydro Engineering, Inc. has been supplying bio-mechanical filtration systems for equipment and vehicle washing applications since 1986. We are experts at determining what will work for your application.

Hydrokleen™ filtration and recycling equipment are modular in design. Determine what you need, based on your effluent and discharge or recycling requirements, and get just those components.

Whether you need solids settling, solids filtration, oil coalescing and skimming, bioreactors, emulsified oil filtration, heavy metals filtration, you choose the module to fit your application.

We have highly trained Project Managers that can assist you with your requirements for water filtration or recycling.

Hydrokleen Treatment Systems

Solids Filtration

CFS3: 1-3 GPM, 3-stage, 20 micron nominal

CMAFU: 1-9 GPM, continuous media filter, 5 micron nominal

SST: 1-50 GPM, solids settling tanks

Oil Removal


HE/S1: 1-12 GPM, oil coalescing and skimming

HE/S1-H: 1-12 GPM, oil coalescing/skimming w/ media filter


Bioreactors: 1-50 GPM, moving bed bioreactors


ACF3: 10 GPM, multi-media polishing loop

HE/3000: 1-12 GPM, single multi-media polishing loop

HE/5000: 1-12 GPM, oil coalescing/skimming w/ media filter

HE/7000: 1-12 GPM, oil coalescing/skimming, 2- media filters

HE/8000: 1-25 GPM, oil coalescing skimming, 2- media filters

SPL & DPL: 1-50 GPM, single and dual multi-media polishing

Car/Truck Wash Reclaim Systems

High Flow Wastewater Filtration And Recycling Returns water back to the carwash system at the high flow rates required by this type of equipment

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Solids/Liquid Separation and Filtration

Wastewater Filtration Without Cartridge Filters!

CFS3 Manual filter to 20 microns nominal

CMAFU-2 Continuous Media Automatic Filtration Unit to 1 micron nominal

Oil/Water Separators

OCS Above Ground stand alone oil/water separators

HE/S1 Above Ground oil/water separator

HE/S1-H Above Ground oil/water separator with Hydrosorb, emulsified oil removal
oil water seperators, water recyclers, water filtration

Multi-Media Filtration Units

Stand-Alone Multi-Media Single and Dual Polishing Loop Systems

SPL & DPL Single and Dual Multi-Media systems using in-ground process tanks

Multi-Stage Filters

HE/3000 Single polishing loop, using one filter media

HE/5000 Oil/water separator, single polishing loop, using one filter media

HE/7000 Oil/water separator, dual polishing loop using two different filter medias

HE/8000 25 GPM Oil/water separator, dual polishing loop using two different filter medias

New Hydrokleen Automatic Control System

Automatic Control Systems Are Now Available on Most Hydrokleen and Extreme Clean Units ... Read More

Hydrokleen Solids/Liquid Separation

When using Hydropad portable wash rack systems where in-ground water storage is minimized, our SST is the answer. Why put the water storage below ground and settle out solids there? The SST is self cleaning. SST Solids Settling Tank


Bioreactors can accomplish tasks that mechanical filtration cannot. Organic chemicals will pass right through any mechanical filtration system, although particulate matter can be removed. With a Bioreactor we can break down and consume hydrocarbons and organic chemicals found in many waste streams. Our Bio-Mechanical approach allows our systems to do what the others cannot.... Read More

Build a System from Only the Parts You Need

Our Reclaim / Recycling Or Pretreatment Systems Are Expandable High Flow oil/water separator, bacterial odor control, coalescing, skimming, hydrocarbon, heavy metals and light fuels removal in dual polishing loops.

Car/Truck Wash Reclaim Systems

High Flow Wastewater Filtration And Recycling Returns water back to the carwash system at the high flow rates required by this type of equipment... Read More

car wash water filtration and recycling

pH Monitoring and Dosing Systems

By using a pH monitor, you can determine the exact pH levels of solutions. For example, rather than say that lemon juice is quite acidic, you can say that lemon juice has a pH of 2.4. An exact pH value can be used to control and/or measure acidity or alkalinity levels in your Hydrokleen water filtration and recycling equipment. The pH monitor can automatically dose counteracting chemical(s) into the wastewater to make a change in the pH.

pH Monitor Specifications

Sump Cleaning Made Easy

Our Sump Sucker And Sludge Cart Can Be Used With Hydropads
With these two inexpensive items you can now clean your own sumps. That's right--no more calling the pumper truck and paying high hauling fees. If your wastewater treatment system is using our Hydro-Biodigesters, chances are the sludge you remove is land fill acceptable. Our Biodigesters eat the oils, grease and hydrocarbons from the sludge. Disposal becomes cheap and most customers can put it straight into their dumpster. Check your local regulations first.

Unique In-Ground Sump w/Separator

This 3 x 3 x 4' deep all-steel sump has a unique solids separation basket.
Rocks collected in the basket are easily dumped out by tilting the hinged basket 90 degrees. It's all welded steel construction with epoxy coating to insure durability beyond what pre-cast, plastic or fiberglass sumps offer.

How We Filter Wastewater

Hydrokleen filtration systems employ state-of-the-art, application proven materials of construction and manufacturing techniques to exceed requirements for performance, durability and corrosion prevention. Hydro Engineering, Inc. product quality and design experience ensures customers the most reliable and cost effective solutions available.Touch on this link for a PDF file giving you a quick overview of how we filter wastewater for discharge to sanitary sewer or recycling systems

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Wastewater Recycling Safely

Many competitive systems do not provide recycled water safe for reuse. Check out the important information at the link below.

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Water Test Results That Prove Our Systems Work

Check out these water test results that show actual before and after numbers, proving that Hydrokleen wastewater systems get the job done.

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Customer Reviews for

We Have Experienced a Savings of $14,500 per Month

First I would like to commend the service follow up and the understanding of the solution we required. The attention to detail in the planning phase was a true reflection on the success of the roll out of the equipment... Read More

Hydro Engineering's Water Filtration and Recycling Systems Work

We purchased our first wash water filtration system from Hydro Engineering Inc in 1995. They assisted us with our wash pad design and installed the equipment... Read More

Coolant Cleaning System Really Works

I want to tell you about the Hydrokleen filtration unit we purchased to clean and maintain our coolant in our CNC machines. We were astounded at the amount of sludge build up the Coolant Care unit removed from our coolant... Read More

Hydrokleen Filtration Works

We recycle with Zero Discharge because we are on a septic system. We've gone with Hydro Engineering's system to do what is right... Read More