We have performed jar tests and concluded that 1-2 ppm polymer and 3-5 ppm coagulant is required for floc formation. These are injected upstream of the filters at the same location. I am now wondering if the coagulant should be injected first and then the polymer downstream. I believe these...
The filters have anthracite (top layer where we are experiencing this problem), quartz sand, graded sand, and garnet sand. Raw water enters towards the top and filters its way down through the media layers, at least in theory. At this point, our results do not show significant TSS in the water...
We are commissioning our water treatment equipment and have found that the media filters are becoming "blinded" by a substance, probably the chemicals. The TSS of incoming water is 5-10 ppm and we are injecting both polymer (2ppm)and coagulant (3-5ppm) upstream of the filters (we do have a...
