原位臭氧氧化对活性污泥系统硝化和反硝化作用的影响研究  

Study on the effect of simultaneous ozonation on nitrification and denitrification of activated sludge system

作　　者：鲁智礼[1] 庞朝辉[1,2] 王海燕[2] 周岳溪[2] 柳栋升[2,3] 张娜[2,4] 

机构地区：[1]华北水利水电学院环境与市政工程学院,河南郑州450011 [2]中国环境科学研究院水污染控制技术研究中心,北京100021 [3]北京科技大学土木与环境工程学院,北京100083 [4]河北工程大学城市建设学院,河北邯郸056038

出　　处：《环境污染与防治》2012年第7期1-5,共5页Environmental Pollution & Control

基　　金：国家科技支撑计划课题"城乡统筹农村生活污水污染控制技术与示范"(No.2009BADC2B01);中国环境科学研究院中央公益性科研院所基本科研业务专项资助项目(No.2007KYYW10)

摘　　要：将厌氧序批式间歇反应器(ASBR)和序批式间歇反应器(SBR)串联组成污泥减量新工艺,着重探讨了对SBR段进行原位臭氧投加时,臭氧氧化作用对系统硝化和反硝化能力的影响,并以不投加作为对照。结果表明,将臭氧原位投加到ASBR—SBR组合工艺的SBR段,臭氧投加量为0.027g(以每克MLSS计),每隔3个周期再次投加、连续运行40d,试验组SBR段臭氧投加当期出水COD去除率为86%,比对照组下降了9百分点,但臭氧氧化细胞内大量有机物进入混合液中,为反硝化作用提供了外加碳源,对污泥反硝化能力的提高起到了一定的促进作用;试验组部分硝化细菌由于臭氧的强氧化作用而失去活性,但是随着剩余污泥量的减少,系统的污泥龄延长,有利于硝化细菌的生长,使得系统的硝化能力基本未受影响;试验组臭氧投加当期SBR段出水NO2--N平均浓度比对照组的高18.9%,但经过3个周期的运行后,其SBR段出水NO2--N平均质量浓度降低至7.57mg/L,基本与对照组持平;试验组臭氧投加当期SBR段出水NO3--N的平均浓度高于对照组,但经过3个周期的运行后,试验组出水NO3--N平均浓度低于对照组;试验组臭氧投加当期SBR段出水TN和对照组的出水TN平均去除率分别为65%和75%,但试验组再经过3个周期的运行后,出水TN平均去除率可以达到72%。可见,原位投加臭氧并未对SBR段的硝化和反硝化能力产生明显的影响。The anaerobic sequencing batch reactor （ASBR） and SBR were combined to reduce the sludge pro- duction of activated sludge system. Two ASBR/SBR processes, with or without a sludge ozonation, were operated in parallel for 40 days. The effect of simultaneous sludge ozonation on nitrification and denitrification of ASBR/SBR process was investigated. In the test group （with sludge ozonation） ,ozone was added to the aeration stage of the SBR per 3 cycles with the dosage of 0. 027 g/g,the COD removal rate of SBR was 86o//00 ,which was 9 percent lower than control group （without sludge ozonation）. While, because of the ozone oxidation, a large number of organic matter were released to the mixed liquor which provided a good carbon source for denitrification. Parts of nitrobacteria was deactivated due to the strong oxidation of ozone, but the decreasing excess sludge prolonged the system retention time which benefited the growth of nitrobacteria, so the nitrification capacity of combination process was not influenced. The average effluent NO3--N of test group was 18.9% higher than that of control group,after 3 cycles of operation, the average effluent NO3--N was decreased to 7.57 mg/L,which was flat to the control group. The effluent NO3--N of test group was first higher than that of control group,while it was less than the control group after 3 cycles of opera- tion. The TN removal efficiency of test group and control group was 65 % and 75% respectively,the TN removal effi- ciency of test group was increased to 72%after 3 cycles of operation. It was concluded that nitrification and denitrifi- cation in the SBR are not significantly influenced by simultaneous ozonation.

关 键 词：原位 臭氧氧化 硝化 反硝化 

分 类 号：X703[环境科学与工程—环境工程]