Patents Pending

Someone once told me for anything to occupy a space you first remove what is there. Even if can't see it or feel it, something is there.

What are you doing with your Process liquid or Wastewater ?

Did you know that solids in your Process liquid or Wastewater have a direct affect on your discharge quality that can affect your downstream process ?

Sand or grit can clog pipes and a conventional screen.

Solids in your wastewater have a direct link to your BOD & COD.

Removing your solids will improve your treatment system (if you have one) and help to reduce odors.

If you are discharging to the city you may be paying a surcharge based on your BOD & COD these extra charges can become very expensive.

You can also be paying a surcharge based on TSS (Total Suspended Solids) and FOG (Fats, Oils and Grease).

That’s where we come in, by removing these particles (screening anywhere from 15 to 100 micron) and leaving the micro-nutrients, your treatment system will work more efficiently. Fewer solids means less sludge and that adds up to savings. If you are paying the city a surcharge based on your BOD, COD or TSS that surcharge could be reduced or removed altogether.

The cost savings from using our screen system will save you time and money. 

We can replace your equipment:

*  Bag filter and you never have to buy bags again or open filter housings for maintenance *

*  Basket filter and you never have to service it again *

*  Sand filter and reduce your liquid loss during backwash by 99% *

*  Static screen / Side Hill screen giving you higher flow rates and better screening at a lower micron rating *

*  Inline filter and your need for a high pressure pump *

*  Screw press and give you a better screening at a lower micron rating *

*  Drum filter and reduce the equipment  foot print drastically 

with our screen system.

Some suggested system uses

Paper Pulp 

Brewery wastewater

Wash water

Milk & cheese

BOD reduction

Non-sanitary pre-treatment

Golf course run off

Resin removal

Lime Slurries

Metal cutting fluids

Process water

Flock removal

COD reduction

Tramp oils

Oil filtration

Carbon removal


Swimming Pools

Sand & grit

Fruit juice

Food processing

TSS reduction

Pulp removal

Meat packing wastewater

Filtration media removal

A liquid is applied to the surface of the screen, that liquid is encouraged to go through the screen using our patented technology. All the solids that are larger than the screen openings stay on the surface and are washed away by the next step in our process. The liquid flowing onto the screen never stops not even during the self-cleaning. Screen pore sizes range from 5 microns (um) all the way up to  5000 microns and screens can be made from PP, PE, HDPE, Nylon, SS and many more materials. A 60 micron screen (20"X24") will pass more than 120 gallons a minute (GPM) depending on the percentage of solids in the liquid.

During the second step of the screening process the liquid is blocked from passing through the screen for about 0.25 seconds. This causes the liquid to expand onto the screen surface washing all the collected solids down the screen face toward the collection bin below. The liquid "flow blocking" is stopped and the liquid is allowed through the screen again, all in less than 0.25 seconds. The amount of liquid lost during a self cleaning is normally less than 100 milliliters, any liquid collected in the solids bin can be sent back to be screened again. In most cases the backwash liquid never reaches the bottom of the screen only the solids do. The self-cleaning step can be activated every 5 seconds if needed.

Basic wastewater guidelines by HammerScreens

  1. Never mix domestic (grey/black water) wastewater streams with process wastewater streams prior to treatment.
  2. There are 2 basic wastewater streams, industrial and domestic sanitary.
  3. Sanitary wastewater is everything that goes down the drain at a house (sink, toilet, shower). Gray water that can include washing machine discharge can go to a surface discharge depending on your location.
  4. Industrial wastewater is any type of process liquid that does not come from a home. (Brewery waste, cutting fluids, wash down water etc.).
  5. In order to properly design Biological and Chemical treatment systems, it is important to test your wastewater to determine your Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD).
  6. Most industrial waste streams have a higher BOD and COD than domestic sanitary.
  7. BOD and COD are measurements used to determine how much oxygen is needed for Biological and Chemical reactions to consume the waste contaminants in your discharge.
  8. When using a septic system be very careful what type of chemical you dump down the drain, you can kill off all the bacteria in your system in a matter of minutes.
  9. Any waste that is sent to a city wastewater treatment plant will cost $X.xx per pound of BOD. Your wastewater (even sanitary) will cost you to discharge, $0.001-$0.03 per gallon is normal and for high COD $0.05 per gallon is possible. The more problems your waste stream creates for city the higher the charge. This is done to force you to pre-treat your own wastewater.
  10. Never send an active yeast waste down the drain, these must be pre-treated/exterminated first.
  11. Keep all your waste lines separate until you know they can be mixed.
  12. Leave room in your plans for a wet-well/lift station (120 gal buried transfer pump tank) you will need at least one.
  13. All wastewater systems need a care-taker, if it’s a couple of times a day checking up on the equipment or a full time person looking after everything. The cost of the system and its automation will determine the maintenance required.
  14. Depending on what your goal is, removing all the solids is the first step to any good treatment system.

Don’t forget the by-products of your wastewater treatment system, sludge settled out of a treatment system requires disposal, some by-products can be thrown in the trash (after approval).

All water and wastewater equipment and systems are based on GPM (Gallons per minute), 25K Gal in 10 hours is the same as 41 GPM or 60K gal/D. If you can store your wastewater and treat it over a 22 hour period then the equipment and the system gets smaller and less expensive.

Wastewater treatment systems should operate like an idling Diesel engine, with a consistent even flow.

Our system technology can be applied to other types of screen units (Static Screens, Side Hill Screens, Bar Screens etc.) to increase their current flow rate or the same flow rate with a smaller screen opening size.

We also have a yeast termination and disposal process.

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