The rate limiting step in the digestion of the waste active sludge is hydrolysis the stage. Thermal pre-treatment and chemical sludge disintegration methods can be used to shorten the biochemical hydrolysis process and ...

The individual and combined effects of alkaline and ultrasonic pretreatment on both physical and chemical properties and anaerobic biodegradability of waste activated sludge (WAS) were investigated comprehensively in ...