电辅助微生物反应器降解苯并噻唑效能的研究

Degradation of Benzothiazole in Electro-Assisted Microbial Reactor

本研究采用单室电辅助微生物反应器(EAMR)氧化苯并噻唑(BTH),考察了外加电压和COD/BTH对BTH降解效能的影响.结果发现,BTH在阳极氧化降解为2-羟基苯并噻唑(OHBT)后,噻唑环断裂,最终转化为2-甲磺酰基苯胺;BTH的降解过程符合表观一级动力学规律,并且提高外加电压和引入共基质代谢作用均能提高BTH的降解反应速率常数;在外加电压0.7 V和COD/BTH值为30∶1时,48 h后BTH的降解率可以达到96%,实现了BTH类废水的高效脱毒,为后续生物处理创造了有利的条件.

The oxidative degradation of benzothiazole (BTH) in a single-chamber electro-assisted microbial reactor was investigated. The effects of applied voltage and COD/ BTH ratio on the performance of degrading benzothiazole were studied. The research showed that BTH was oxidized to 2-hydroxy-benzothiazole ( OHBT ), then thiazole ring scission, and BTH translated into 2-methylsulfonylaniline eventually. The degrading of benzothiazole was in conformity with the pseudo first-order kinetic model, and the pseudo first-order kinetic constant can be increased by raising the applied voltage and co-metabolism. When the applied voltage was 0. 7 V and COD/ BTH ratio was 30, the degradation rate was 96% in 48 h, achieving the detoxification of BTH, and that is advantageous to the biochemical treatment.