摘要
以2个市政污水处理厂(分别简称LD和DT)的活性污泥和二级出水样品作为接种物,分别采用"密闭瓶法"和"呼吸计量法"实验,测试2,4-二氯苯酚和联苯的降解性。结果表明,在密闭瓶法实验中,2个二级出水样品都能使2,4-二氯苯酚的降解率达到超过60%的通过水平;LD和DT的二级出水样品分别使联苯表现为难降解性和可降解性。在呼吸计量法实验中,LD和DT的活性污泥分别使2,4-二氯苯酚表现为难降解性和易降解性,而均使联苯表现为可降解性。选用的接种物和测试方法的不同会导致受试物的降解性结果显示出明显的差异性。因此,对于化学品的降解性测试,不仅需要标准方法,还需要相关权威机构提供标准接种物。
The biodegradability of 2,4-dichlorophenol and biphenyl was tested by closed bottle test and manometric respirometry test with different activated sludge and secondary effluent samples from LD and DT Municipal Wastewater Treatments Plants. In closed bottle test,both rates of degradation of 2,4-dichlorophenol can reach the target by LD and DT secondary effluent samples. However,biphenyl was refractory and degradable,respectively. Compared with closed bottle test,the results of manometric respirometry test indicated that biphenyl was degradable by activated sludge of LD and DT. Moreover,2,4-dichlorophenol was refractory and easily degradable,respectively. From the results,we can conclude that inoculums and test methods have a great effect on the degradation of chemicals. Therefore,standard test method and inoculum are necessary for degradation of chemicals.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第6期3041-3045,共5页
Chinese Journal of Environmental Engineering
基金
国家高技术研究发展计划(863)项目(2013AA06A308)
环保公益性行业科研专项(201309028)
国家自然科学青年基金资助项目(21106072)
