Enhanced hydrolysis of waste activated sludge for methane production via anaerobic digestion under N2-nanobubble water addition

Anaerobic digestion (AD) is a relatively safe and economically feasible disposal technique for waste activated sludge (WAS), in which hydrolysis of complex organic matters is the rate-limiting step. The aim of this study is to explore the efficiency of applying nitrogen gas nanobubble water (N2-NBW) to AD of WAS and reveal the possible mechanisms. The possible effects of N2-NBW on different processes during AD of WAS were investigated and N2-NBW...