It is well known that polyacrylamide flocculant should be used in the dewatering and pressure filtration treatment of municipal sewage sludge. However, when polyacrylamide polymer flocculant fails to achieve a better effect in the treatment of municipal sewage treatment sludge, what should on-site technicians do?
It can be said that the use of polyacrylamide flocculant for sludge dewatering in municipal sewage treatment plants is crucial.
When the effect of sludge dewatering is not good, the main performance is: the mud cake moisture content is high, mud cake filter cloth, etc.
The main reasons for the bad effect are: the dosage of polyacrylamide polymer flocculant is not correct, the selection of flocculant is not suitable, the performance of flocculant is not stable.
Firstly, the amount of adding polyacrylamide flocculant can be appropriately increased or reduced by changing the amount of adding the flocculant. If the effect is not improved, other types of polymer should be considered.
The selection of polyacrylamide flocculant for sludge removal in urban sewage treatment plant is generally in accordance with the following principles: if the belt type of sludge removal press is used, the polymer flocculant with low viscosity should be selected, because too high viscosity will be easy to adhere to the belt, so the mud removal effect is not good.
Centrifuge requires high molecular flocculant ion degree to be larger, under the action of centrifugal force can better make muddy water separation.