重庆市城镇污水处理厂氧化沟工艺综合评价研究
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摘要
选取化学需氧量(COD)、氨氮(NH_3-N)、五日生化需氧量(BOD5)、总氮(TN)、总磷(TP)、悬浮物(SS)为统计指标,对采用氧化沟工艺的重庆市城镇污水处理厂2015—2017年的出水水质进行了分析,结果表明:6项指标的达标率均在97. 8%以上,平均去除效率较高的是NH_3-N和BOD5,较低的是TN和TP;NH_3-N和BOD5去除效率比较集中,TN和TP去除效率则比较分散;由于受季节和进口浓度的影响,各项指标出水浓度离散程度较大,TP和TN出水浓度近似服从正态分布,出水水质95%的置信区间符合《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级标准,BOD5和COD出水浓度取决于出口水质中的还原性有机污染物的总量,除NH_3-N与TP之间呈负相关外,其余两两指标间均呈正相关。
Effluent quality of town wastewater treatment plants based on oxidation ditch treatment technology from 2015 to 2017 were analyzed statistically with regard to COD,NH_3-N,BOD5,TN,TP and SS. The results showed that the standard-reaching ratios of six indexes were above 97. 8% and the average removal rates of NH_3-N and BOD5 were higher than those of TN and TP. Removal efficiencies of NH_3-N and BOD5 were more centralized,while those of TN and TP were decentralized. Effluent concentration of each index had great dispersion due to different season and the imported concentration,and those of TP and TN were distributed normally. 95% confidence interval of exports water quality meets the first-level standard of"Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant"( GB 18918-2002). The effluent concentration of BOD5 and COD depends on the reducing organic pollutants in the outlet water. In addition to negative correlation between NH_3-N and TP,there is a positive correlation between the other 2 indexes.
Effluent quality of town wastewater treatment plants based on oxidation ditch treatment technology from 2015 to 2017 were analyzed statistically with regard to COD,NH_3-N,BOD5,TN,TP and SS. The results showed that the standard-reaching ratios of six indexes were above 97. 8% and the average removal rates of NH_3-N and BOD5 were higher than those of TN and TP. Removal efficiencies of NH_3-N and BOD5 were more centralized,while those of TN and TP were decentralized. Effluent concentration of each index had great dispersion due to different season and the imported concentration,and those of TP and TN were distributed normally. 95% confidence interval of exports water quality meets the first-level standard of"Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant"( GB 18918-2002). The effluent concentration of BOD5 and COD depends on the reducing organic pollutants in the outlet water. In addition to negative correlation between NH_3-N and TP,there is a positive correlation between the other 2 indexes.
引文
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[2]丁健生,冯求宝,李敬敏,等.城镇污水处理工艺研究进展[J].广东化工,2014,41(3):155-156DING J S,FENG Q B,LI J M,et al. Study and Development Process of Towns Sewage Treatment Technology[J]. Guangdong Chemical Industry,2014,41(3):155-156
[3]伍溢春,杨文婷.城镇污水处理工艺与设备发展趋势浅谈[J].中国新技术新产品,2015(8):172WU Y C,YANG W T. Talking about the Development Trend of Urban Sewage Treatment Process and Equipment[J]. China New Technologies and Products,2015(8):172
[4]周国庆,张红兵,李玉晖.化工环境保护设计手册[M].北京:化学工业出版社,1998ZHOU G Q, ZHANG H B, LI Y H. Chemical Environmental Protection Design Manual[M]. Beijing:Chemical Industry Press,1998
[5]张小平.固体废物污染控制工程[M].北京:化学工业出版社,1998ZHANG X P. Solid Waste Pollution Control Project[M].Beijing:Chemical Industry Press,1998
[6]余波,周英,黄正文,等. CASS工艺应用于小城镇污水处理厂的工艺设计及效果分析[J].绵阳师范学院学报,2014,33(5):81-87YU B,ZHOU Y,HUANG Z W,et al. Process Design and Effect Analysis of Domestic Sewage Treatment in Small Towns by Using CASS Process[J]. Journal of Mianyang Normal University,2014,33(5):81-87
[7]黄贤文,张海红,冯求宝,等.城镇污水处理现状分析及对策[J].绿色科技,2014,(3):53-56HUANG X W,ZHANG H H,FENG Q B,et al. Analysis and Countermeasure about China's urban Sewage Treatment Current Situation[J]. Journal of Green Science and Technology,2014(3):53-56
[8] RANDALL C W. Design and Retrofit of Wastewater Treatment Plants for Biological Nutrient Removal[M].Lancaster:Technomic Publishing Co,1992:112-125
[9]李建民,董志英,杜义鹏,等. A2/O氧化沟-絮凝沉淀-V型滤池组合工艺在城镇污水处理中的应用[J].给水排水,2011,37(7):41-43LI J M,DONG Z Y,DU Y P,et al. Application of A2/O Oxidation Ditch-Flocculation Sedimentation-V Type Filter in Urban Sewage Treatment[J]. Water&Wastewater Engineering,2011,37(7):41-43
[10]吴奂. Carrousel(卡鲁塞尔)氧化沟工艺在城镇污水处理中的运用分析[J].湖南有色金属,2010,26(2):47-50WU H. Analysis of the Practice of Carrousel Oxidation Ditch Technique in Urban Sewage Treatment[J]. Hunan Nonferrous Metals,2010,26(2):47-50
[11]苏翔,王佳,张伟.曝气量对好氧填料床处理农家乐生活污水的影响[J].重庆工商大学学报(自然科学版),2013,30(12):57-62SU X,WANG J,ZHANG W. Influence of Different Aeration Rates on “Farm Fun” Sewage Treatment in Aerobic Packed Bed[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),2013,30(12):57-62
[12]贾俊平.统计学[M].北京:清华大学出版社,2004JIA J P. Statistics[M]. Beijing:Tsinghua University Press,2004
[13]王静,刘洪杰,雷禹,等.三峡库区小江支流沉积物硝化反硝化速率在蓄水期和泄水期的特征[J].环境科学,2017,38(3):946-953WANG J,LIU H J,LEI Y,et al. Nitrification and Denitrification Rates in a Small Tributary,Nanhe River,of Three Gorge Dam Reservoir during Water Collection and Release Events[J]. Environmental Science,2017,38(3):946-953
[14]翁齐文.福州市洋里污水处理厂氧化沟工艺运行情况及改进分析[J].福建建筑,2006,98(2):125WENG Q W. Operation and Improvement Discussion on Carrousel Oxidation Ditch Process of Fuzhou Yangli Wastewater Treatment Plant[J]. Fujian Architecture&Construction,2006,98(2):125
[15]姜亚敏,邢磊,朱喜礼,等.城市污水处理厂改良氧化沟工艺除磷效果影响因素分析[J].水处理技术,2007,33(7):53-56JIANG Y M,XING L,ZHU X L,et al. Analysis of Factors Influencing Dephosphorization in Municipal Wastewater Treatment Plant by Modified Oxidation Ditch[J].Technology of Water Treatment,2007,33(7):53-56
[16]游卫强,杨燮明.污水处理厂Carrousel氧化沟工艺研究[J].中国环保产业,2009,12:54-57YOU W Q,YANG X M. Research on Carrousel Oxidation Channel Technology in Sewage Treatment Plant[J]. China Environmental Protection Industry,2009,12:54-57