Industrial Wastewater Treatment : Eliminating Floating Floc


When running an industrial wastewater treatment technique, the floc that forms can often float. If your treatment system contains floating floc, you know it can be a challenge to eliminate. Typically the floc actually contains the contaminants of which are in your current wastewater, so if it isn’t taken out before the wastewater is discharged, you may be from compliance with the discharge permit.

Right now there are many things that cause floating floc. Some of the more common reasons are described beneath, along with servicing tips that you can use to be able to help you know what may be creating floating floc in your system.

Drinking water flow which is too high

When typically the water flow price reaches or around the maximum movement rate that your particular clarifier was designed to be able to handle, floc will not have time and energy to settle in the particular clarifier like that should. This may cause the floc to float. If you have recently increased the stream rate, try decreasing it to verify if typically the floc settles. In the event that you have certainly not increased the circulation rate recently, a person should investigate additional causes.

Oxidants introduced into the Waste Stream

Oxidants want hydrogen Peroxide (H2O2) can cause floc to float. Industrial wastewater treatment package can conduct a new jar test to be able to determine whether or even not an oxidant is causing the hovering floc. When you do so, look for typically the floc to end up being towards the top of the beaker rather than the bottom. At times it will take because long as 15 to 30 moments to for floc to float. When you confirm of which oxidants are bringing about the floc to be able to float, you can include some sort of reducing agent this kind of as bisulfate or even a proprietary metal precipitant to your waste materials stream. You should consult your wastewater treatment services merchant about the best procedure for including reducing agents to your waste treatment program.

Floc that may be too light plus too large

Found in some cases, floc can become as well fluffy and lightweight during treatment. Generally there are several alternatives for correcting this particular. You can try using a heavier coagulant, changing to a more compatible polymer bonded, or altering how the polymer is usually dosed. Changing the polymer dosing method can be while simple as changing the dose level. You can furthermore replace the polymer concentrations that are being used. With regard to example, if you utilize an emulsion or dry polymer at 0. 3% by amount, try 0. 15% by volume instead. You may in addition want to consider changing where the particular polymer is dosed inside the water remedy process. Sometimes dosing within the last reaction tank beyond the clarifier can easily prevent floating floc.

Polymer overdose

The particular overdosing polymer can easily also cause hovering floc that will not resolve. If your floc is very tiny and light (often called pin-floc), that is an indication that your particular polymer will be being overdosed. An individual can conduct a jar test to determine the optimal polymer dosage for your wastewater.

Biological outgassing

Because anaerobic bacteria expand, they may outgas or release oxygen. This kind of causes bubbles to be able to rise towards the area of the drinking water and for floc (or sediment) to be able to float in huge chunks, even when the system isn’t running. If an individual see bubbles and larger chunks regarding floc, biological outgassing is likely to blame. To correct this kind of problem, you will want to first of all flush out the clarifier with an air sparger, plus then you could handle it with the biocide. The biocide will inhibit typically the bacteria growth.


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