Sewage sludge disintegration by combined treatment of alkaline + high pressure homogenization

► A synergy effect was achieved with combined sludge disintegration of alkaline + HPH. ► Maximum sludge disintegration degree with combined treatment was 59.26%. ► Sludge disintegration model for combined treatment was 11-DDCOD=0.713C0.334P0.234N0.119. ► Energy efficiency with combined treatment significantly increased.