改良型Carrousel氧化沟工艺生物脱氮优化研究  

Optimization of Biological Nitrogen Removal in Modified Carrousel Oxidation Ditch Process

作　　者：唐锋兵[1,2] 吴坤茹 达书峰[4] 李思敏 TANG Feng-bing;WU Kun-ru;DA Shu-feng;LI Si-min(Hebei Engineering Research Center for Water Pollution Control and Water Ecological Remediation, Hebei University of Engineering, Handan 056038, China;College of Energy and Environmental Engineering, Hebei University of Engineering, Handan 056038, China;Shenyang Municipal Engineering Design and Research Institute, Shenyang 110015, China;Handan Municipal Drainage Co. Ltd., Handan 056001, China)

机构地区：[1]河北工程大学河北省水污染控制与水生态修复工程技术研究中心,河北邯郸056038 [2]河北工程大学能源与环境工程学院,河北邯郸056038 [3]沈阳市市政工程设计研究院,辽宁沈阳110015 [4]邯郸市市政排水有限责任公司,河北邯郸056001

出　　处：《中国给水排水》2018年第13期91-94,97,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07203-003);邯郸市科学技术研究与发展计划项目(1723209055);河北工程大学青年学术骨干基金资助项目(201401)

摘　　要：为解决采用改良型Carrousel氧化沟工艺的某污水厂出水TN与NH_4^+-N浓度高的问题,经现场试验对SRT、HRT和DO等工艺参数进行了优化调整。通过问题诊断,发现系统SRT过长、HRT短及好氧区DO浓度低是导致脱氮效果差的直接原因;工艺优化结果表明,将系统的SRT、HRT和好氧区DO浓度分别控制在18 d、16 h和2.5~3.0 mg/L时系统的脱氮效果提升较大,此时出水TN、NH_4^+-N的平均浓度分别为12.6和3.3 mg/L,去除率分别为78%和91%,且出水BOD5、COD与SS等指标均达到了《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。The parameters including SRT, HRT and DO concentration were optimized through scale experiments, to solve the high concentrations of TN and NH4 ＋- N in the effluent of a modified Car- rousel oxidation ditch process in a wastewater treatment plant. The diagnosis results indicated that long SRT, short HRT and low DO concentration were the direct causes of the poor denitrification. The process optimization results showed that the system achieved higher nitrogen removal efficiency when the SRT, HRT and DO concentration were controlled at 18 d, 16 h, and 2.5 -3.0 mg/L, respectively. The aver- age concentrations of TN and NH4＋ - N in the effluent were 12.6 mg/L and 3.3 mg/L, and the removal rates were 78% and 91% , respectively. Additionally, the effluent BODs, COD and SS all met the first level A criteria in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB 18918- 2002 ）.

关 键 词：改良型Carrousel氧化沟 生物脱氮 污泥龄 水力停留时间 溶解氧 

分 类 号：TU992.3[建筑科学—市政工程]