化工学报2016，Vol.67Issue(4)：1512-1519,8.DOI:10.11949/j.issn.0438-1157.20151320
活性艳蓝经多相类芬顿预处理前后对厌氧污泥性能的影响
Influence of reactive brilliant blue before and after pre-treatment by heterogeneous Fenton-like on characteristics of anaerobic granular sludge
摘要
Abstract
Using reactive brilliant (RB) blue as anthraquinones model pollutants, the inhibition mechanism on methanogenic activity of anaerobic granular sludge was investigated. Likewise, the effect of sludge characteristics on particle size distribution (PSD), metal content and extracellular polymeric substances (EPS)via pre-treatment of heterogeneous Fenton-like oxidation were evaluated. Lastly, degradation pathway of RB blue was proposed. The results showed that RB blue had metabolic or even physiologic toxicity for methanogens. When RB blue was injected into anaerobic reactor, COD removal efficiency was reduced and partical size of anaerobic granular sludge was decreased. Meanwhile, the calcium and magnesium ion concentrations of the granular sludge decreased from 40.5 and 16.2 mg·L−1 to 22.5 and 6.8 mg·L−1, respectively. The stability and flocculability of the granular sludge were deteriorated. However, by pre-treatment of heterogeneous Fenton-like oxidation, COD removal efficiency climbed to more than 90%, while the contents of EPS, protein and polysaccharide increased to 98.7, 69.9, and 28.8 mg·(g VSS)−1, respectively, which guaranteed the favorable stability and activity of the anaerobic granular sludge. The exploration on degradation pathway of RB blue indicated that the hydroxyl free radicals firstly attacked triazine group and anthraquinone structure of RB blue, producing phthalic acid and benzoic acid. After that, they were degraded into small molecule carboxylic acid such as butyric acid, oxalic acid, acetic acid, and so on. The toxicity was reduced, which was beneficial to the anaerobic biological post-treatment.关键词
活性艳蓝/多相类芬顿/毒性评价/厌氧/催化剂/粒径分布Key words
reactive brilliant blue/heterogeneous Fenton-like/toxicity assessment/anaerobic/catalyst/particle size distribution分类
资源环境引用本文复制引用
宿程远,李伟光,黄智,陈孟林..活性艳蓝经多相类芬顿预处理前后对厌氧污泥性能的影响[J].化工学报,2016,67(4):1512-1519,8.基金项目
广西自然科学基金项目（2015GXNSFAA139267）；岩溶生态与环境变化研究广西高校重点实验室资助项目（YRHJ15Z006）。@@@@supported by the Natural Science Foundation of Guangxi (2015GXNSFAA139267) and the University Key Laboratory of Karst Ecology and Environmental Change of Guangxi (YRHJ15Z006) （2015GXNSFAA139267）
