Towards physicochemical and biological effects on detachment and activity recovery of aging biofilm by enzyme and surfactant treatments

被引：54
作者：
Huang, Hui [1 ]
Yu, Qisheng [1 ]
Ren, Hongqiang [1 ]
Geng, Jinju [1 ]
Xu, Ke [1 ]
Zhang, Yan [1 ]
Ding, Lili [1 ]
机构：
[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Jiangsu, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2018年 / 247卷
基金：
中国国家自然科学基金;
关键词：
Activity recovery of aging biofilm; Enzyme; Surfactant; Physicochemical effect; Biological effect; WASTE-WATER TREATMENT; DIFFERENT OPERATIONAL CONDITIONS; DISSOLVED ORGANIC-MATTER; ATOMIC-FORCE MICROSCOPY; AERATED FILTER; ACTIVATED-SLUDGE; RHAMNOLIPID-BIOSURFACTANT; PSEUDOMONAS-AERUGINOSA; REACTOR; PERFORMANCE;
D O I：
10.1016/j.biortech.2017.09.082
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
In order to explore physicochemical and biological effects on detachment and activity recovery of aging biofilm by enzyme and surfactant treatments, two kinds of biofilm processes, i.e. biological aeration filter (BAF) and moving bed biofilm reactor ( MBBR), and multiple indicators including water quality, biofilm morphology, activity and microbial community structure, were employed. Results showed that detachment of aging biofilm was mainly attributed by extracellular polymeric substance (EPS) solubilization and dispersion, and activity recovery of aging biofilm mainly depended on biological effects of dominant bacteria. Phosphorus metabolism related bacteria, such as Microbacterium and Micropruina, were responsible for BAF biofilm regeneration. More abundant microbial community structure of MBBR regenerated biofilm was found, and biofilm activity was not only related to phosphorus metabolism related bacteria, but also to denitrifying bacteria. Rhamnolipid performed best on aging biofilm detachment and regeneration, giving a clue for effective activation of aging biofilm in wastewater treatment systems.
引用
收藏
页码：319 / 326
页数：8
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