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1. (WO2017178356) IMPROVING SLUDGE DEWATERABILITY AND ENERGY BALANCE OF WASTEWATER TREATMENT

Pub. No.:    WO/2017/178356    International Application No.:    PCT/EP2017/058345
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Sat Apr 08 01:59:59 CEST 2017
IPC: C02F 1/00
C02F 1/52
C02F 1/56
C02F 3/28
B01D 21/01
C02F 1/38
Applicants: KEMIRA OYJ
Inventors: LIKANDER, Joonas
HALTTUNEN, Sakari
GRÖNFORS, Outi
HANSEN, Bengt
Title: IMPROVING SLUDGE DEWATERABILITY AND ENERGY BALANCE OF WASTEWATER TREATMENT
Abstract:
The present invention relates to a process for treating primary sludge in a wastewater treatment plant, comprising the steps of admixing an organic coagulant and/or polymer to wastewater; allowing a primary treatment of the wastewater in the presence of the organic coagulant or polymer; separating solids as a primary sludge from said primary treatment; and dewatering the primary sludge. The present invention further relates to a method of improving primary sludge dewaterability and improving energy balance of a wastewater treatment plant.