Compared effects of “solid-based” hydrogen peroxide pretreatment on disintegration and properties of waste activated sludge

作     者：Hai-Chao Luo Wan-Qian Guo Qi Zhao Hua-Zhe Wang Nan-Qi Ren Hai-Chao Luo;Wan-Qian Guo;Qi Zhao;Hua-Zhe Wang;Nan-Qi Ren

作者机构：State Key Laboratory of Urban Water Resource and EnvironmentHarbin Institute of TechnologyHarbin 150090China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2022年第33卷第3期

页      面：1293-1297页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：financially supported by the National Natural Science Foundation of China (No. 51978201) the State Key Laboratory of Urban Water Resource and Environment (No.2020DX08) 

主　　题：Waste activated sludge “Solid-based”hydrogen peroxide Oxygen reactive species Sludge disintegration Nutrients release 

摘      要：The effects of two solid-based hydrogen peroxides sodium percarbonate(SPC) and calcium peroxide(CP)on waste activated sludge(WAS) disintegration were investigated. Both oxidants achieved efficient WAS disintegration for the synergistic effect of alkaline and oxidation. The strong alkaline condition led to the leakage of ammonia and the existence of abundant calcium ions accelerated the fixation of phosphorus via precipitation in CP WAS disintegration process. However, the spongy-like layer and low p H condition retarded the release of gaseous ammonia in SPC group. Hydroxyl radical was the main oxygen reactive species in SPC approaches which were more intense than CP by electron spin resonance(ESR) *** treated WAS contented more small particle size matter and total suspended solids(TSS) increased dramatically. In conclusion, CP pretreated sludge was more suitable for fertilization, while SPC was in favor of anaerobic digestion. This study clarified the differences between these two oxidants and their intermediates on nutrients release in sludge disintegration.