Jornal de Biorremediação e Biodegradação

Abstrato

Review of Enzymatic Sludge Hydrolysis

GUO Jin-song and Xu Yu-feng

Biotechnology is the major process in urban sewage treatment, the operation of which generates a large amount of excess sludge. Treatment of excess sludge has become a major environmental problem. The present article reviews the enzymatic cleavage of activated sludge, which involves the promotion of sludge floc cracking by extracellular enzymes. Appropriate filamentous fungi may have a positive effect on strengthening sewage treatment efficiency and recessive growth reduction. Based on the extracellular enzyme distribution in the sludge flocs, extracellular polymeric substances may be an important factor in inhibiting enzymatic sludge cracking. Furthermore, the key to enhancing the enzymatic activity is by breaking the sludge flocs. Several treatment processes that enhance the enzymatic sludge cleavage are included in this paper.