摘要：

采用弱电强化厌氧生物反应系统对废水中的壬基酚（NP）进行降解，研究系统对NP的降解特性、系统降解NP的产电特性以及NP降解产物的生物毒性。实验结果表明：弱电介导可明显促进NP在厌氧生物体系中的降解，当NP初始质量浓度为30 mg/L时，NP与体系中TOC在6 d内的降解率分别可达61.23%和54.02%，且NP的降解符合一级反应动力学模型；体系具有良好的产电性能，最大输出电压和功率密度分别可达0.72 V和487.37 mW/m²；NP生物降解过程中涉及到的主要产物包括3，4-二羟基苯甲酸和对羟基苯甲酸等，推测其降解机理主要涉及羟基化反应和氧化反应；NP废水在弱电强化厌氧生物反应系统对其进行降解的周期末，生物毒性被明显降低。

关键词: 降解, 壬基酚, 厌氧微生物, 生物毒性, 产电性能

Abstract:

The weak current enhanced anaerobic biological reaction system was used to degrade NP in wastewater. The degradation characteristics of NP，the electrochemical performance of the system and the biological toxicity of NP degradation products were studied. The experimental results showed that weak current could significantly promote the degradation of NP in the anaerobic biological system. When the initial mass concentration of NP was 30 mg/L，the degradation rates of NP and TOC in system in 6 d could reach 61.23% and 54.02% respectively，and the degradation of NP conformed to the first-order reaction kinetic model. The system had good electricity generation performance，and the maximum output voltage and power density could reach 0.72 V and 487.37 mW/m²，respectively. The main products in the biodegradation of NP included 3，4-dihydroxybenzoic acid and p-hydroxybenzoic acid. It was speculated that the degradation mechanism mainly involved hydroxylation reaction and oxidation reaction. At the end of the NP degradation cycle of the weak current enhanced anaerobic biological reaction system，the biological toxicity of NP-containing wastewater was significantly reduced.

Key words: degradation, nonylphenol, anaerobic microbes, biological toxicity, electricity generation performance

中图分类号: 

• X703.1