School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
Bioresour Technol. 2016 Jul;212:138-143. doi: 10.1016/j.biortech.2016.03.165. Epub 2016 Apr 2.
The high-strength 2,4-DCP, which exists in two states: dissolved and colloidal, was studied by a continuously electro-microbial system (CEMS) and an intermittently electro-microbial system (IEMS). The hydrolysis rate of colloidal 2,4-DCP in the IEMS without electric assistance was much higher than that in the CEMS. However, the degradation rate of the dissolved 2,4-DCP and the dissolved intermediates (2-chlorophenol and 4-chlorophenol) in the IEMS without electric assistance were much lower than that in the CEMS. By adjusting the intermittent operation mode, the degradation time of 2,4-DCP was shortened greatly. Microbial characteristics in the CEMS and the IEMS were different. The correlation analysis for the main factors affecting the hydrolysis was performed by SPSS, and it was found that the correlation coefficient (rp) was -0.912 for extracellular polymeric substances (EPS) content, 0.823 for zeta potential and 0.632 for relative hydrophobicity, respectively.
该高强度 2,4-DCP 以溶解态和胶体态两种形态存在，通过连续电微生物系统 (CEMS) 和间歇电微生物系统 (IEMS) 进行了研究。在没有电辅助的 IEMS 中，胶体 2,4-DCP 的水解速率远高于 CEMS。然而，在没有电辅助的 IEMS 中，溶解态 2,4-DCP 和溶解中间产物（2-氯苯酚和 4-氯苯酚）的降解速率要低得多。通过调整间歇操作模式，大大缩短了 2,4-DCP 的降解时间。CEMS 和 IEMS 中的微生物特性不同。通过 SPSS 对影响水解的主要因素进行相关性分析，发现胞外聚合物（EPS）含量的相关系数（rp）分别为-0.912、zeta 电位为 0.823、相对疏水性为 0.632。
