摘要
针对太湖流域204座城镇污水处理厂,利用实际运行数据系统分析了水质特征以及有机物、氮、磷和悬浮物之间的概率分布和相关关系。结果表明,太湖流域污水处理厂污水中NH3-N和TN浓度分布符合正态分布,COD、BOD5、SS和TP的浓度分布均呈正偏态分布。进水BOD5/COD值在0.4~0.6之间分布的污水处理厂概率为39.2%,说明太湖流域整体进水的生化性较差;进水SS/BOD5分布超过1.5的概率为36.3%,表明太湖流域进水易造成生物系统污泥的活性的降低;BOD5/TN的均值为3.82,表明进水反硝化碳源不足;进水BOD5/TP>20的概率为82.8%,基本满足生物除磷的要求。水质指标中BOD5和COD,SS和BOD5、COD,TN和NH3-N之间存在显著的一元线性相关关系。结合新排放标准和太湖地区进水水质特征,提出适用于太湖流域污水处理厂提标工艺技术路线建议,为新一轮提标改造提供借鉴和参考。
Based on the operating data of 204 wastewater treatment plants(WWTPs)in Taihu Basin,the influent water quality was described in detail,and the probability distribution and correlation were further analyzed among organic matters,nitrogen and phosphorus contaminants and suspended solids(SS).The results indicated that the NH3-N and total nitrogen(TN)fitted normal distribution,while the COD,BOD5,SS and TP show positive skew distribution.The influent BOD5/COD that ranged from 0.4 to 0.6 was 39.2%,implied poorly biodegradability of WWTPs in Taihu Basin.Comparatively high SS/BOD5 resulted in relatively low bioactivity,which the influent SS/BOD5 exceeding 1.5 was up to 36.3%.In addition,the influent carbon source for denitrification was insufficient due to the low influent BOD5/TN,however,the probability of influent BOD5/TP>20 was 82.8%,suggest that biological phosphorus removal could be basically achieved.There was significant linear dependence relation between BOD5 and COD,SS and BOD5 and COD,TN and NH3-N according to the regression analysis.The technical route for improving standards of WWTPs in Taihu Basin is proposed based on the characteristics of influent water quality,which can provide reference for the new round of standards improvement.
作者
邹吕熙
李怀波
郑凯凯
王燕
王硕
李激
Zou Lüxi;Li Huaibo;Zheng Kaikai;Wang Yan;Wang Shuo;Li Ji(Jiangsu College of Water Treatment Technology and Material Collaborative Innovation Center,Suzhou 215009 ,China;Jiangsu Key Laboratory of Anaerobic Biotechnology,Jiangnan University,Wuxi214122, China)
出处
《给水排水》
CSCD
北大核心
2019年第7期39-45,共7页
Water & Wastewater Engineering
基金
国家水体污染控制与治理科技重大专项(2017ZX07202001)
关键词
太湖流域
污水处理厂
进水水质
水质特征
回归分析
Taihu Basin
Wastewater treatment plant
Influent water quality
Wastewater characteristics
Regression analysis
