Eleren Sevil Calişkan, Alkan Ufuk
Department of Environmental Engineering, Faculty of Engineering and Architecture, Uludag University, 16059 Bursa, Turkey.
Bioresour Technol. 2009 Dec;100(23):5714-20. doi: 10.1016/j.biortech.2009.06.054. Epub 2009 Jul 26.
The effects of phenol, 2-chlorophenol (2-CP), 2,4-dichlorophenol (2,4-DCP) and 1,2,4-trichlorobenzene (1,2,4-TCB) on the biodegradation kinetics of the conventional activated sludge system (CASS) and the selector activated sludge system (SASS) were investigated. Experiments were carried out using a respirometric method on unacclimated biomass from two lab-scale systems that were operated with the sludge age of 8 days. Toxicity of the test compounds for both reactors were arranged according to EC(50) (effective concentration) values in order as: 1,2,4-TCB>2,4-DCP>2-CP>phenol. All selected test compounds induced higher inhibition effect in the CASS. The SASS appeared to reduce inhibition effect in comparison to the CASS, by 21.36%, 66.95%, 64.37% and 33.33% for phenol, 2-CP, 2,4-DCP and 1,2,4-TCB, respectively. Consequently, the SASS may be recommended as a promising configuration alternative for the waste streams containing toxic compounds.
研究了苯酚、2-氯苯酚（2-CP）、2,4-二氯苯酚（2,4-DCP）和1,2,4-三氯苯（1,2,4-TCB）对常规活性污泥系统（CASS）和选择器活性污泥系统（SASS）生物降解动力学的影响。采用呼吸测定法，对两个污泥龄为8天的实验室规模系统中未驯化的生物质进行了实验。根据EC(50)（有效浓度）值，将测试化合物对两个反应器的毒性依次排列为：1,2,4-TCB>2,4-DCP>2-CP>苯酚。所有选定的测试化合物在CASS中均表现出较高的抑制作用。与CASS相比，SASS对苯酚、2-CP、2,4-DCP和1,2,4-TCB的抑制作用分别降低了21.36%、66.95%、64.37%和33.33%。因此，对于含有有毒化合物的废水流，SASS可能是一种有前景的配置选择。
