Home General Business Wastewater Treatment — Eliminating Floating Floc

Business Wastewater Treatment — Eliminating Floating Floc


When running an industrial wastewater treatment technique, the floc that will forms can occasionally float. If the treatment system contains floating floc, you know it can be a concern to eliminate. The floc actually contains the contaminants that are in your wastewater, so when it isn’t removed before the sewage is discharged, an individual may be away from compliance with your discharge permit.

There are many items that cause floating floc. Some of the more common leads to are described beneath, along with maintenance tips that an individual can use to be able to help you determine what may be causing floating floc within your system.

Drinking water flow that is certainly too high

When the particular water flow charge is at or near the maximum circulation rate that your particular clarifier was designed in order to handle, floc will not have time for you to settle in the particular clarifier like that should. This can result in the floc to be able to float. When you have lately increased the flow rate, try decreasing it to verify if the particular floc settles. When you have not increased the flow rate recently, an individual should investigate additional causes.

Oxidants introduced into the Waste Stream

Oxidants love hydrogen Peroxide (H2O2) can cause floc to float. An individual can conduct a jar test in order to determine whether or even not an oxidant is causing the suspended floc. If you choose so, look for typically the floc to end up being towards the top of the beaker rather than the bottom. Occasionally it can take as long as 15 to 30 a few minutes to for floc to float. If you confirm that oxidants are causing the floc in order to float, contain some sort of reducing agent such as bisulfate or even a proprietary metal precipitant to your waste stream. You have to consult your wastewater treatment services vendor about the best procedure for putting reducing agents to your waste remedy program.

Floc that is too light in addition to too large

Inside some cases, floc can become also fluffy and light-weight during treatment. Right now there are several options for correcting this kind of. You can try out utilizing a heavier coagulant, changing to a new more compatible polymer bonded, or altering exactly how the polymer will be dosed. Changing the particular polymer dosing method can be while simple as transforming the dose charge. You can furthermore change the polymer concentrations that are being used. Intended for example, if you use a good emulsion or dry out polymer at 0. 3% by volume, try 0. 15% by volume as an alternative. You may likewise want to take into account changing where the particular polymer is dosed inside the water treatment process. Sometimes dosing in the last reaction container as well as the clarifier can easily prevent floating floc.

Polymer overdose

The overdosing polymer can easily also lead to floating floc that will not pay. If your floc is very little and light (often called pin-floc), that will is an indicator that your polymer is definitely being overdosed. You can conduct a jar test to look for the optimal polymer dose for your sewage.

Biological outgassing

Because anaerobic bacteria develop, they will outgas or even release oxygen. This particular causes bubbles to rise to the surface of the drinking water and for floc (or sediment) in order to float in big chunks, even any time the system isn’t running. If you see bubbles and larger chunks associated with floc, biological outgassing is likely at fault. To correct this particular problem, you will need to primary flush out typically the clarifier with a good air sparger, and then you can treat it with some sort of biocide. Industrial wastewater treatment package will inhibit the bacteria growth.


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