The characteristics of dissolved organic matter (DOM) formed in aerobic and anaerobic digestion of waste-activated sludge (WAS) after ozone pretreatment were investigated with three ozone dosages (4.72, 10.96, and 13.8 mg O3/min) and four ozonation times (0, 10, 20, and 30 min) using six aerobic and six anaerobic digestion reactors. High decreasing rate of volatile suspended solid/total suspended solid indicated enhanced destruction of volatile solids and efficient sludge reduction. The results of TOC and UV absorbance indicated that increasing ozone dosage and time significantly enhanced hydrolysis and degradation of DOM. Data analysis with a first-order sequential reaction model revealed that, for aerobic digestion, kh increased in the range of 0.00049-0.00154 day-1; and for anaerobic digestion of WAS, kh increased in the range of 0.00302-0.00796 day-1 and kd increased in the range of 0.24910-0.54548 day-1. Detailed analysis of the composition of DOM showed that ozone pretreatment increased irreversible membrane resistance (IMR) and enhanced the breakdown of large DOM molecules, the formation of aromatic proteins, and tryptophan- and tyrosine-aromatic amino acids, as well as the accumulation of humic acid- and fulvic acid-like substances.

中文翻译：

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臭氧预处理对废物活化污泥的好氧和厌氧消化过程中形成的溶解有机物特性的影响。

研究了三种臭氧剂量（4.72、10.96和13.8 mg O3 / min）和四个臭氧化时间（0）对臭氧预处理后的废水污泥（WAS）的好氧和厌氧消化过程中形成的溶解有机物（DOM）的特性。 ，10、20和30分钟）使用六个有氧消化反应器和六个厌氧消化反应器。挥发性悬浮固体/总悬浮固体的高降低率表明挥发性固体的破坏增强，污泥有效减少。TOC和UV吸光度的结果表明，增加臭氧剂量和时间可以显着增强DOM的水解和降解。一阶顺序反应模型的数据分析显示，对于有氧消化，kh在0.00049-0.00154 day-1范围内增加；对于WAS的厌氧消化，kh在0.00302-0的范围内增加。00796第1天和kd在0.24910-0.54548第1天的范围内增加。对DOM组成的详细分析表明，臭氧预处理增加了不可逆膜抗性（IMR），并增强了大DOM分子的分解，芳香蛋白的形成，色氨酸和酪氨酸-芳香族氨基酸以及腐殖质的积累酸和黄腐酸样物质。