H2S, MeSH, and NH3 emissions from activated sludge: An insight towards sludge characteristics and microbial mechanisms
H2S, MeSH, and NH3 emissions from activated sludge: An insight towards sludge characteristics and microbial mechanisms
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DOI：
10.1016/j.ibiod.2021.105331
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发表时间：
2021-10-28
影响因子：
4.8
通讯作者：
Li, Fusheng
中科院分区：
文献类型：
--
作者：
Cui, Guangyu;Bhat, Sartaj Ahmad;Li, Fusheng
通过对活性污泥的理化性质和细菌组成的综合评价，研究了活性污泥的恶臭排放潜力。三种类型的污泥处理屠宰场（SWTP），肉类加工（MWTP）和生活污水（DWTP）的基础上不同的形态特征，推测影响气味的产生。具有相对较多的分解细胞碎片的SWTP污泥中的总元素S表现出比MWTP和DWTP污泥中更高的水平，而排放的气味物（硫化氢和甲基硫）表现出相反的模式（即，SWTP污泥的最低水平）。硝化细菌仅在SWTP污泥中检测到，这与相应曝气池中丰富的硝酸盐完全一致。主成分分析结果表明，污泥的臭气排放潜力与脱氢酶活性、硝酸盐含量有较强的相关性，这些参数可作为评价污泥或处理产物臭气排放潜力的参考指标。
The present study investigated the odor emission potential of activated sludge through comprehensive assessment for physicochemical properties and bacterial profile of sludge. Three types of sludges from wastewater treatment plants treating slaughterhouse (SWTP), meat processing (MWTP) and domestic wastewater (DWTP) were used based on distinct morphological features which were speculated to impact odor generation. Total element S in the SWTP sludge with relatively more disintegrated cellular debris exhibited higher level than that in the MWTP and DWTP sludge, while the emitted odorants (hydrogen sulfide and methyl mercaptan) showed the opposite patterns (i.e., the lowest level for the SWTP sludge). Nitrifying bacteria was only detected in the SWTP sludge, which was well in line with abundant nitrate in the corresponding aeration tank. Principal component analysis indicated that the potential of the odor emission from the sludge had strong correlations with dehydrogenase activity, and nitrate, which implies that these parameters may serve as referring indices for evaluating the potential of odor emission of sludge or treated product.