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Acidogenic Fermentation Facilitates Anaerobic Biodegradation of Polycyclic Aromatic Hydrocarbons in Waste Activated Sludge
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-01-30 00:00:00 , DOI: 10.1021/acssuschemeng.8b06425 Leiyu Feng 1, 2 , Jianguang Chen 1 , Feng Wang 1 , Yinguang Chen 1, 2 , Jingyang Luo 3, 4
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-01-30 00:00:00 , DOI: 10.1021/acssuschemeng.8b06425 Leiyu Feng 1, 2 , Jianguang Chen 1 , Feng Wang 1 , Yinguang Chen 1, 2 , Jingyang Luo 3, 4
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The anaerobic biodegradation of phenanthrene (PHE), a typical polycyclic aromatic hydrocarbon (PAH) in waste activated sludge (WAS), during acidogenic fermentation created by alkaline pHs and biosurfactant was examined in this study. The anaerobic biodegradation efficiency of PHE increased from 17.6% with an operation time of 8 days in the control to 47.5% at pH 10.0, and to 78.2% under the conditions of pH 10.0 and 0.3 g alkyl polyglucose (APG) per gram of total suspended solids (TSS) with a mineralization rate of 25.1%. A mechanistic exploration indicated that the bioavailability of PHE was remarkably improved because of the disruption of sludge structure, and enhancement of transfer and sorption by bacteria and transmembrane transport into microbial cells by alkaline pH and APG. Under acidogenic conditions, the abundance of key microorganisms, especially typical acidogenic bacteria that were capable of degrading PHE, activities of key microbial enzymes, and quantities of functional genes were benefitted by PHE biodegradation. The protein released from WAS facilitated electron transfer among microorganisms and stimulated the cometabolism of PHE. Possible pathways of PHE biodegradation under acidogenic conditions were presented.
中文翻译：
产酸发酵促进废物活性污泥中多环芳烃的厌氧生物降解。
在这项研究中，研究了在碱性pH和生物表面活性剂引起的产酸发酵过程中，废活性污泥（WAS）中典型的多环芳烃（PAH）中菲（PHE）的厌氧生物降解。PHE的厌氧生物降解效率从对照的8天操作时间的17.6％提高到pH 10.0时的47.5％，以及在pH 10.0和0.3 g烷基聚葡萄糖（APG）每克总悬浮液的条件下达到78.2％。固体（TSS）的矿化率为25.1％。机理探索表明，PHE的生物利用度显着提高，这是因为污泥结构的破坏，以及碱性pH和APG增强了细菌的转移和吸收以及跨膜向微生物细胞的迁移。在产酸条件下，关键微生物的数量丰富，尤其是能够降解PHE，关键微生物酶活性以及功能基因数量众多的典型产酸细菌都可以通过PHE生物降解而受益。从WAS释放的蛋白质促进了微生物之间的电子转移，并刺激了PHE的新陈代谢。介绍了在产酸条件下PHE生物降解的可能途径。
更新日期：2019-01-30
中文翻译：
产酸发酵促进废物活性污泥中多环芳烃的厌氧生物降解。
在这项研究中，研究了在碱性pH和生物表面活性剂引起的产酸发酵过程中，废活性污泥（WAS）中典型的多环芳烃（PAH）中菲（PHE）的厌氧生物降解。PHE的厌氧生物降解效率从对照的8天操作时间的17.6％提高到pH 10.0时的47.5％，以及在pH 10.0和0.3 g烷基聚葡萄糖（APG）每克总悬浮液的条件下达到78.2％。固体（TSS）的矿化率为25.1％。机理探索表明，PHE的生物利用度显着提高，这是因为污泥结构的破坏，以及碱性pH和APG增强了细菌的转移和吸收以及跨膜向微生物细胞的迁移。在产酸条件下，关键微生物的数量丰富，尤其是能够降解PHE，关键微生物酶活性以及功能基因数量众多的典型产酸细菌都可以通过PHE生物降解而受益。从WAS释放的蛋白质促进了微生物之间的电子转移，并刺激了PHE的新陈代谢。介绍了在产酸条件下PHE生物降解的可能途径。
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