Hu Yuan-Yuan, Yang Na, Ding Yi, Xu Wen-Lu, Chen Xiu-Rong, Ai Qi-Feng, Chen Shan-Jia, Wang Li-Peng, Huang Hua
College of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China.
Huan Jing Ke Xue. 2013 Apr;34(4):1363-8.
The aerobic sequencing batch activated sludge system (SBR) was used to remove the toxic and refractory organic pollutant, N,N-dimethylformamide (DMF). The formation property and spatial distribution of the organic toxicity in sludge were studied. The operation parameters were controlled as follows: influent COD was about 300 mg x L(-1), every DMF concentration phase lasted 30 d(40 mg x L(-1), 80 mg x L(-1), 120 mg x L(-1)), the SBR cycle lasted 12 h, and DO was 2.0-3.0 mg x L(-1). The results showed that the sludge toxicity increased in the beginning and then decreased to a steady range at each DMF concentration phase; there was a positive correlation between the sludge toxicity and the initial DMF concentration; most of the sludge organic toxicity was caused by DMF biodegradation and existed in the inner extracellular polymeric substances (EPS) and intracellular section of sludge flocs.
采用好氧序批式活性污泥系统（SBR）去除有毒难降解有机污染物N，N-二甲基甲酰胺（DMF）。研究了污泥中有机毒性的形成特性及空间分布。操作参数控制如下：进水化学需氧量（COD）约为300 mg·L⁻¹，每个DMF浓度阶段持续30 d（40 mg·L⁻¹、80 mg·L⁻¹、120 mg·L⁻¹），SBR周期为12 h，溶解氧（DO）为2.0 - 3.0 mg·L⁻¹。结果表明，在各DMF浓度阶段，污泥毒性先升高后降至稳定范围；污泥毒性与初始DMF浓度呈正相关；大部分污泥有机毒性是由DMF生物降解引起的，存在于污泥絮体的胞外聚合物（EPS）内部和细胞内部分。
