基于DO和ORP一阶导数的短程硝化SBR实时控制研究  

The study on real-time control of nitritation SBR based on the first-derivative of DO and ORP

作　　者：吴朕君 穆剑楠[2] 刘铭雪 于明俭 王岩 蔡明[5,4] 李顺义[2] WU Zhenjun;MU Jiannan;LIU Mingxue;YU Mingjian;WANG Yan;CAI Ming;LI Shunyi(Yellow River Engineering Consulting Co., Ltd., Postdoctoral Program, Zhengzhou 450003;School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001;Yellow River Engineering Consulting Co., Ltd., Environmental Engineering Design Institute, Zhengzhou 450003;Yellow River Engineering Consulting Co., Ltd., Institute of City Environmental Hydraulic Planning and Designing, Zhengzhou 450003;Henan Engineering Research Centre of Urban Water Resource and Environment, Zhengzhou 450003)

机构地区：[1]黄河勘测规划设计有限公司博士后科研工作站,郑州450003 [2]郑州大学化工与能源学院,郑州450001 [3]黄河勘测规划设计有限公司环境工程设计研究院,郑州450003 [4]河南省城市水资源环境工程技术研究中心,郑州450003 [5]黄河勘测规划设计有限公司水生态与景观艺术设计院,郑州450003

出　　处：《环境科学学报》2019年第5期1544-1553,共10页Acta Scientiae Circumstantiae

基　　金：黄河勘测规划设计有限公司博士后研究开发项目(No.YREC-2017-PD01)

摘　　要：以序批式生物反应器(Sequencing Batch Reactor,SBR)为基础,研究了短程硝化SBR启动过程中在线监测信号(溶解氧(DO)和氧化还原电位(ORP))的变化规律,考察了不同进水氨氮负荷下DO和ORP一阶导数的变化特征,并对SBR中不同阶段的微生物群落结构进行了对比分析.结果表明,在特定的运行条件下(29～30℃,初始pH>8.2,SRT=14),避免硝化阶段的过度曝气,可在第6 d实现短程硝化-反硝化SBR的快速启动.SBR对氨氮去除率维持在97%以上,亚硝化率(NAR)可长期稳定在98%以上.对SBR运行过程中的DO和ORP进行了长期监测,并对它们的一阶导数进行实时计算,结果发现,在短程硝化终点和反硝化终点处,DO与ORP的一阶导数均出现了极值,并且在不同进水氨氮负荷下,极值基本维持稳定.微生物群落分析结果表明,全程硝化阶段的污泥中同时含有氨氧化菌(AOB)和亚硝酸氧化菌(NOB),短程硝化污泥中几乎不含NOB.研究表明,利用DO和ORP的一阶导数极值作为控制参数是稳定可行的,对实现短程硝化SBR工艺的实时控制具有潜在的研究和应用价值.This study focused on the variation of online signals(DO and ORP) based on the sequencing batch reactor(SBR), and investigated the variation characteristics of the first-derivatives of DO and ORP with different NH+4-N loads, and analyzed the microbial community structure in different operation stages of SBR. The results showed that the nitritation-denitrification SBR started rapidly on the 6th day with controlled operation conditions(temperature 29~30 ℃, initial pH>8.2, SRT=14 d) and avoiding excessive aeration. The removal efficiency of ammonium was more than 97%, and the nitrite accumulation rate(NAR) was higher than 98%. The first-derivatives of DO and ORP were monitored on for a long time. The first-derivatives of both DO and ORP had extremums at the end of nitritation and denitrification periods,and the values were stable under different ammonium loads. The analysis results of microbial community showed that nitrification sludge contained both AOB and NOB, while nitritation sludge almost did not contain NOB. The results demonstrate that it is stable and feasible using the extremum values of first-derivative of DO and ORP as the control parameters in nitritation SBR, which has a potentially application value to realize the real-time control on nitritation SBR.

关 键 词：短程硝化 实时控制 DO和OPR一阶导数 微生物群落 

分 类 号：X703[环境科学与工程—环境工程]