Effect of DEHP on SCFA Production by Anaerobic Fermentation of Waste Activated Sludge
Effect of DEHP on SCFA Production by Anaerobic Fermentation of Waste Activated Sludge
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DEHP对废弃活性污泥厌氧发酵生产SCFA的影响
DOI：
10.1155/2020/1705232
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发表时间：
2020-02
影响因子：
3.1
通讯作者：
Zhou Man
中科院分区：
文献类型：
--
作者：
Gong Rui;Tang Xiang;Fan Changzheng;Zhang Baowei;Zhou Man
邻苯二甲酸二辛酯（DEHP）是工业生产中常用的增塑剂。近年来，由微塑料引起的环境问题引起了广泛关注。由于微塑料具有较大的比表面积，增塑剂从微塑料向环境的释放速度加快。废水中的DEHP随城市管道沿着进入污水处理厂。DEHP进入污水处理厂后，可能会影响以废活性污泥为原料的厌氧发酵。到目前为止，还没有关于DEHP对WAS厌氧发酵影响的研究。研究了外源DEHP对WAS厌氧发酵的影响，结果表明，DEHP主要影响污泥厌氧消化的溶解阶段，对其他阶段影响不显著。它不影响短链脂肪酸（SCFA）的总产率和组成。但DEHP对WAS厌氧发酵的增溶过程有抑制作用，主要表现为体系中可溶性蛋白和可溶性多糖的变化。微生物群落分析结果显示，DEHP的添加并没有改变微生物群落的多样性，但引起了微生物丰度的变化。DEHP降低了产乙酸菌的丰度，增加了产甲烷菌的丰度。这项工作为在DEHP存在下的WAS发酵系统提供了一些见解，并有助于更好地了解微塑料的潜在环境危害。
Diethylhexyl phthalate (DEHP) is a common plasticizer in industrial production. Recently, environmental problems caused by microplastics have drawn wide attention. As the microplastics have a large specific surface area, the release rate of the plasticizer from the microplastics to the environment is accelerated. The DEHP in the wastewater enters the wastewater treatment plants (WWTPs) along with the urban pipeline. After DEHP enters the WWTPs, it may affect the anaerobic fermentation with waste activated sludge (WAS) as raw material. So far, there has been no study on the effect of DEHP on anaerobic fermentation of WAS. Our study focused on the impact of exogenous DEHP on WAS anaerobic fermentation, and the results showed that DEHP mainly affects the solubilization stage of sludge anaerobic digestion, but has no significant effect on other stages. It does not affect the total yield and composition of short-chain fatty acids (SCFA). However, DEHP inhibited the solubilization process of WAS anaerobic fermentation, which was mainly manifested by the changes of soluble protein and soluble polysaccharide in the system. The results of the analysis of microbial communities revealed that the addition of DEHP did not change the diversity of microbial communities, but caused a change in the abundance of microbial organisms. DEHP reduced the abundance of acetogen bacteria and increased the abundance of methanogens. This work provides some insights into WAS fermentation systems in the presence of DEHP and helps to gain a better understanding of the potential environmental hazards of microplastics.
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影响因子：
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