Optimalisering av driften ved Saulekilen Renseanlegg i Arendal kommune med hensyn på kjemisk felling og slamavvanning

The wastewater contains a lot of nutrients that can be harmful to nature, such as phosphorus. Therefore, to avoid negative consequences caused by these nutrients, it is desirable to minimize them before discharge. The chemical purification step consists of several processes, chemical precipitation, coagulation, flocculation, and separation. The main goal of these processes is to form large enough flocks of the precipitated particles so that they become large enough to be able to separate it from the wastewater by separation methods. The separated particles are passed on in the form of sludge where it is treated and thickened and centrifuged to dewater it. Arendal municipality doses based on…