摘要
研究了零价铁（zero-valentiron，ZVI）固定床-序批式气提生物反应器（SABR）偶合系统降解4-氯硝基苯（4-CINB）。结果表明，ZVI可还原转化4-C1NB为4-氯苯胺（4-C1A），反应遵循准一级反应动力学；以实验室好氧颗粒污泥作为接种物分批培养结果显示，4-C1NBZVI还原产物可被好氧降解；ZVI固定床-SABR偶合系统在COD负荷1．35～1．74kg·m^-3·d^-1，4-C1NB负荷250～340g·m^-3·d^-1条件下运行37d，稳定运行后出水COD维持在65mg·L^-1以下，去除率≥90％，4-CIA浓度维持在0．35mg·L^-1以下，去除率≥99％；ZVI-微生物偶合系统可有效去除氯代硝基苯类污染物。
The objective of this research is to evaluate an integrated zero-valent iron（ZVI） column and sequencing airlift bioreactor（SABR） for treatment of 4-chloronitrobenzene （4-CINB）. ZVI can reductively transform 4-CINB to 4-chloroaniline（4-CIA）, and reductive reactions were followed by pseudo-first-order kinetics, The transform product 4-CIA was found to be readily biodegradable by aerobic granules. The integrated ZVI-SABR system was operated with COD loading of 1.35～1.74 kg m^-3 d^-1 and 4-C1NB loading of 250～340 g m^-3 d^-1. In effluent, COD concentration were lower than 65 mg L-1 , and 4-C1A concentration were lower than 0.35 mg L^-1. The success of the bench-scale integrated system suggests that an integrated ZVI aerobic microorganism process may be a feasible option for treating CINBs-laden wastewater.
出处
《科技通报》
2008年第3期417-423,共7页
Bulletin of Science and Technology
基金
国家自然科学基金资助项目(No.50378082)
浙江省科技计划重点项目(2004C23021)
关键词
氯代硝基苯
零价铁
生物降解
偶合
Chloronitrobenzenes
zero-valent iron
biodegradation
coupling
