盐城市某原水预处理厂设计与运行分析  

Analysis of Design and Operation for a Raw Water Pretreatment Plant in Yancheng City

作　　者：王毅 井添祺 周家中 万兰庆 吴迪 杨华仙 WANG Yi;JING Tianqi;ZHOU Jiazhong;WAN Lanqing;WU Di;YANG Huaxian(Yanlong Lake Drinking Water Source Management Office,Yancheng 224000,China;Qingdao Spring Water Treatment Co.,Ltd.,Qingdao 266555,China;Project Department of Tinghu District Drinking Water Safety Engineering Pretreatment Plant of Beijing Jiu'an Construction Investment Group Co.,Ltd.,Yancheng 224000,China;Southwest Municipal Engineering Design&Research Institute of China,Chengdu 610081,China)

机构地区：[1]盐城市盐龙湖饮用水源管理处,江苏盐城224000 [2]青岛思普润水处理股份有限公司,山东青岛266555 [3]北京久安建设投资集团有限公司亭湖区饮用水安全工程预处理厂项目部,江苏盐城224000 [4]中国市政工程西南设计研究总院有限公司,四川成都610081

出　　处：《净水技术》2020年第7期24-29,34,共7页Water Purification Technology

摘　　要：江苏省盐城市某原水预处理厂总处理规模为30万m^3/d,要求出水达到《地表水环境质量标准》(GB 3838—2002)Ⅲ类水体要求。综合进出水水质、投资占地等,经充分经济论证和方案比选,采用“高锰酸钾预氧化+MBBR生化法+中置式高密度沉淀池”组合工艺对原水进行强化处理。核心生化段采用纯膜MBBR工艺,设6级硝化,气水比设计为0.6~1.3。实际运行结果表明,各出水水质稳定达到地表水Ⅲ类标准,其中,氨氮最低可达0.1 mg/L。对悬浮载体进行高通量测序,结果显示,其对硝化菌具有良好的富集能力,低基质条件下,硝化菌相对丰度可达2.36%,强化了氨氮的去除。经过中置式高密度沉淀池的强化,保障了COD和TP的稳定达标。全厂电耗为0.052 kW·h/t。该工艺路线操作简单,运行成本低,后期维护少,适用于微污染原水的治理。The total treatment capacity of a raw water pretreatment plant in Yancheng City,Jiangsu Province is 3.0×10^5 m^3/d,and the effluent is required to meet class Ⅲ quality standard for Environmental Quality Standards for Surface Water(GB 3838—2002).After full technical and economic demonstration and scheme comparison,with the consideration of quality inflow and outflow,investment land occupation,combined process of"KMnO4 preoxidation+MBBR biochemical tank+medium high density sedimentation tank"are adopted to strengthen the treatment of raw water.The core biochemical section adopts pure MBBR process,with 6 stages of nitrification and an air-water ratio of 0.6~1.3.Actual operation results show that water quality of outflow is stable up to class Ⅲ standard of surface water,and the minimum ammonia nitrogen is 0.1 mg/L.Results of high-throughput sequencing show that suspended carriers has good enrichment capacity for nitrifying bacteria.Under the condition of low substrate,relative abundance of nitrifying bacteria could reach 2.36%,which enhances the removal of ammonia.Through the strengthening of medium high density sedimentation tank,the stability of COD and TP are guaranteed to reach the standard.The power consumption of the whole plant is 0.052 kW·h/t.Above all,the process is simple in operation,low in operation cost and less in later maintenance,and is suitable for the treatment of micropolluted raw water.

关 键 词：微污染原水 预处理 地表水Ⅲ类标准 移动床生物膜反应器(MBBR) 中置式高密度沉淀池 

分 类 号：TU991.2[建筑科学—市政工程]