Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.
Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.
Sci Total Environ. 2023 Dec 15;904:166596. doi: 10.1016/j.scitotenv.2023.166596. Epub 2023 Aug 26.
The use of catalyst materials to mediate the enhancement of microbial degradation in wastewater is a new economic and energy saving breakthrough in water treatment technology. In this study, γ-AlO, which is commonly used as catalyst/carrier, is used as biological filler to treat kitchen-oil wastewater with low biodegradability, and the COD removal rate is about 50 %. It is found that the complexation of cationic vacancies on AlO surface with extracellular polymeric substance (EPS) secreted by microorganisms in wastewater lead to the polarization of electron distribution on biofilm. The efficient degrading bacteria are enriched on reaction interface and obtain electrons to maintain electron dynamic balance by enhancing the transmembrane metabolism of pollutants. The aluminum vacancies on AlO surface accelerate the microbial degradation of pollutants. The cationic vacancies in the structure of catalyst accelerate the acquisition of exogenous electrons by microorganisms without the addition of external energy, which provides a new idea for catalytic fillers to enhance wastewater degradation.
采用催化剂材料来介导增强废水中微生物降解是水处理技术中的一种新的经济和节能突破。在本研究中，γ-AlO 通常被用作催化剂/载体，被用作生物填料来处理可生化性低的厨房废油废水，COD 去除率约为 50%。研究发现，废水中微生物分泌的胞外聚合物（EPS）与 AlO 表面的阳离子空位的络合作用导致了生物膜上电子分布的极化。高效降解菌在反应界面上得到富集，并通过增强污染物的跨膜代谢作用获得电子来维持电子动态平衡。AlO 表面的铝空位加速了污染物的微生物降解。催化剂结构中的阳离子空位加速了微生物对外源电子的获取，而无需额外的外部能量，这为催化填料增强废水降解提供了新的思路。
