Chang B V, Chiang F, Yuan S Y
Department of Microbiology, Soochow University, Shih Lin, Taipei 111, Taiwan.
Chemosphere. 2005 Jun;59(10):1415-20. doi: 10.1016/j.chemosphere.2004.12.055.
We investigated the effects of various factors on the anaerobic degradation of nonylphenol (NP) in sludge. NP (5 mg/l) anaerobic degradation rate constants were 0.029 1/day for sewage sludge and 0.019l/day for petrochemical sludge, and half-lives were 23.9 days and 36.5 days respectively. The optimal pH for NP degradation in sludge was 7 and the degradation rate was enhanced when the temperature was increased. The addition of yeast extract (5 mg/l) or surfactants such as brij 30 or brij 35 (55 or 91 microM) also enhanced the NP degradation rate. The addition of aluminum sulfate (200 mg/l) inhibited the NP degradation rate within 84 days of incubation. The high-to-low order of degradation rates was: sulfate-reducing conditions>methanogenic conditions>nitrate-reducing conditions. Sulfate-reducing bacteria, methanogen, and eubacteria are involved in the degradation of NP, sulfate-reducing bacteria being a major component of sludge.
我们研究了各种因素对污泥中壬基酚（NP）厌氧降解的影响。对于污水污泥，5mg/L的NP厌氧降解速率常数为0.029 1/天，对于石化污泥为0.019 1/天，半衰期分别为23.9天和36.5天。污泥中NP降解的最佳pH值为7，温度升高时降解速率加快。添加酵母提取物（5mg/L）或表面活性剂如Brij 30或Brij 35（55或91μM）也能提高NP降解速率。添加硫酸铝（200mg/L）在培养84天内抑制了NP降解速率。降解速率由高到低的顺序为：硫酸盐还原条件>产甲烷条件>硝酸盐还原条件。硫酸盐还原菌、产甲烷菌和真细菌参与了NP的降解，硫酸盐还原菌是污泥的主要成分。
