化学
污水污泥
水解
生物降解
环境化学
污水处理
消化(炼金术)
废水
无氧运动
中层
胞外聚合物
食品科学
污水
好氧消化
作者
Zhangliang Han,Fei Qi,Ruoyu Li,Hui Wang,Dezhi Sun
出处
期刊:Chemosphere
[Elsevier]
日期:2020-02-03
卷期号:249: 126077-
被引量:6
标识
DOI:10.1016/j.chemosphere.2020.126077
摘要
Abstract Aerobic composting and anaerobic digestion with hydrolysis pretreatment are two mainstream methods used to recycle and reclaim sewage sludge. However, during these sludge treatment processes, many odors are emitted that may cause severe emotional disturbance and health risks to those exposed. This study identified odor pollution (i.e. sensory influence, odor contribution, and human risks) from samples collected during sludge aerobic composting throughout different seasons as well as during anaerobic digestion with hydrolysis pretreatment. Odor intensity, odor active values, and permissible concentration-time weighted averages for ammonia and five volatile sulfur compounds were assessed. The results revealed serious odor pollution from all sampling sites during aerobic composting, especially in winter. Excessively strong odors were identified in the composting workshop, with total odor active values between 997 and 8980 which accounted for 78.45%–96.18% of the total sludge aerobic composting plant. Levels of ammonia and dimethyl disulfide in the ambient air were high enough to harm employees’ health. During anaerobic digestion, excessively strong odors were identified in dehydration workshop 2, and the total odor active values of six odors reached 32,268, with ammonia and hydrogen sulfide levels significant enough to harm human health.
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