Sludge treatment process What is sludge? Sl udg e is semi-s oli d slu rry and organic matter that produce and settle down in primary and second ary sedimentati on tanks fro m wastewate r tre atment processes. Sludge is commonly disposed of by storing it in tank ( called a digester) where it will go through anaerobic d igestion. Sludge treatment process Sludge treatment process consist of 3 stage which is thickening, digestion, and dewatering 1. Slud ge ti cken ing. he sludge that comes out of waste water t reatment has a higher water content. !n sludge tickening, the content of sludge is increased by reducing the water content and thickening means the process of reduction of moisture content of a sludge. hickening process helps in reduc ing the capacity of digestion tank and pro"ides control of digestion conditions. #ra"ity thickening is one of si mplest Ways to reduce the content of sludge by using le ss ene rgy. Sl udge wi ll be pumped di rect ly into the round ta nk which e$uipped with a slowly rotating rake which the function is to break the connection between the sludge particles and therefore increase the settling and compaction. #ra"ity thickening helps to reduced the total sludge "olume by e"en %&' from the original "olume .nit s of thicke ning are gra"it y thick ener, floatat ion thick ener and elutr iati on thickener.
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