THEODOULOU, Michael David,HARRISON, Dorian,DEBACKER, Marion
申请号：
WO2018US31914
公开号：
WO2018208999(A1)
申请日:
2018.05.09
申请国别(地区):
世界知识产权组织国际局
年份:
2018
代理人:
摘要：
Sludge, for example primary sludge or waste activated sludge or both from a wastewater treatment plant, is pre-treated prior to anaerobic digestion. The pre-treatment includes an optuional mechanical treatment to reduce the viscosity of the sludge and a biological hydrolysis treatment. The biological hydrolysis treatment may be performed in a series of reactors some of which are maintained at a temperature in the range of 50 to 70°C. The reactors provide a combined residence time in the range of 0.5 to 6 days. Optionally, measurements of the pH of the sludge during or after biological hydrolysis, or the production of biogas from a downstream anaerobic digester, may be considered in adjusting the temperature of one or more of the biological hydrolysis reactors.
