吸附剂对市政污水浓缩效能的影响

来源：中国环境科学杂志2024年第11期北京时间：

作者：郝立图, 杨晓欢, 田端云, 夏思恋, 陈荣

单位：西安建筑科技大学环境与市政工程学院, 陕西省环境工程重点实验室, 陕西 西安 710055

摘要：In order to investigate the effects of different adsorbents on carbon source concentration and membrane separation in the coagulation adsorption microfiltration process, this study used polyaluminum chloride (PACL) as a coagulant, and compared three types of adsorbents: powdered activated carbon (PAC), biochar (BC), and magnetic biochar (Fe-BC). The concentration efficiency, membrane fouling characteristics, methane production potential, and microbial community analysis of the concentrate were revealed. Content of COD, protein, and total phosphorus in the concentrate was significantly increased by the addition of adsorbents. The optimal concentration efficiency of the PAC group was 81.8%, and the protein content was about 2.4 times that of the control group. However, the enrichment effect of polysaccharides and total nitrogen was not significant. The membrane fouling of the BC group concentrate was found to be lower. A membrane resistance of 3.31×108m-1 caused by the concentrate was lower than that of the AC group (4.61×108m-1) and the Fe BC group (4.13×108m-1). In addition, the relative abundance of Proteobacteria, which are prone to membrane fouling, in the BC group concentrate was lower. The higher methane production potential of the BC group was due to the higher abundance of Bacteroidota, which participated in EPS and floc formation in the concentrate. The high abundance of Firmicutes involved in the hydrolysis and acidification process in the Fe BC concentrated solution provided favorable conditions for improving the methane production rate.

关键词：碳源浓缩,生物炭,膜污染,产甲烷潜力

基金资助：国家杰出青年科学基金资助项目(52325002);陕西省杰出青年科学基金资助项目(2022JC-031);国家重点研发计划资助项目(2022YFC3203102-01)