The effects of different hypochlorite types (namely Ca(OCl)₂ and NaOCl) on the waste activated sludge (WAS) anaerobic fermentation, and microbial community and activity were investigated. The results indicated that both Ca(OCl)₂ and NaOCl contributed to volatile fatty acids (VFAs) production by simultaneously enhancing the solubilization, hydrolysis and acidification processes. The maximal VFAs was respectively 1379.5 (at 10 d) and 1621.5 (at 8 d) mg COD/L at the optimal dose of NaOCl and Ca(OCl)₂ while it was merely 157.4 (at 6 d) mg COD/L in the control. However, the Ca(OCl)₂ might affect the anaerobic process in a continuous mode while the NaOCl was relatively transient, which caused distinctive influences on the microbial structure and activity, and subsequently VFAs production in WAS fermentation systems. Moreover, Ca(OCl)₂ treatments showed advantages over NaOCl on WAS dewatering and VSS reduction, implying the superiority of utilizing Ca(OCl)₂ as additives for WAS disposal.

研究了不同类型的次氯酸盐（即Ca（OCl）₂和NaOCl）对废物活性污泥（WAS）厌氧发酵的影响，以及微生物群落和活性。结果表明，Ca（OCl）₂和NaOCl都通过同时增强溶解，水解和酸化过程来促进挥发性脂肪酸（VFA）的产生。在最佳剂量的NaOCl和Ca（OCl）_2下，最大VFA分别为1379.5（在10 d时）和1621.5（在8 d）时的COD / L，而仅在15 d（在6 d）时，COD / L仅为157.4 mg。控制。但是，Ca（OCl）₂NaOCl相对短暂时，可能以连续模式影响厌氧过程，这对微生物的结构和活性以及随后在WAS发酵系统中产生VFA产生了显着影响。而且，Ca（OCl）₂处理在WAS脱水和VSS减少方面显示出优于NaOCl的优势，这表明利用Ca（OCl）₂作为WAS处理添加剂的优势。