UASB-SBR工艺处理规模化畜禽养殖废水  

Treatment of large-scale livestock wastewater by UASB-SBR process

作　　者：杜龑 周北海 袁蓉芳[1,2] 包向明 李冬溦[4] 

机构地区：[1]北京科技大学能源与环境工程学院,北京100083 [2]北京科技大学工业典型污染物资源化处理北京市重点实验室,北京100083 [3]江苏泰源环保科技股份有限公司,宜兴214266 [4]北京博世科环保科技有限公司,北京100020

出　　处：《环境工程学报》2018年第2期497-504,共8页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2015ZX07203-011)

摘　　要：针对规模化畜禽养殖废水常规厌氧-好氧组合处理工艺及SBR处理工艺脱氮效率低、运行费用高等问题,采用UASB-SBR工艺,研究3种不同的SBR模式对处理效果的影响。结果表明,UASB容积负荷(以COD计)8 kg·(m^3·d)-1、pH 7.0、温度35℃、HRT 25 h时,COD去除率为80%~85%;SBR在进水15 min、反应480 min、沉淀60 min、出水15 min、闲置810 min条件下,对废水COD、NH_4^+-N、和TN去除率分别为91.8%、98.7%和71.6%,出水COD≤180 mg·L^(-1)、NH_4^+-N<15 mg·L^(-1)、TN<50 mg·L^(-1),达到《畜禽养殖业污染物排放标准》(GB 18596-2001)。该运行条件下NO_2^--N积累率超过50%,出现了NO_2^--N积累,短程硝化反硝化是主要脱氮方式。In this paper,a treatment process of UASB-SBR was built to treat the large scale livestock wastewater,which aimed to solve the problem of conventional anaerobic-aerobic treatment process and SBR treatment process including low denification efficiency,high operating costs and so on.Based on the treatment process,three kinds of SBR experiment were studied.It can be seen from the experiment that when the volume loading（calculated by COD） was 8 kg·（m^3·d）^-1,with the pH value of 7,the temperature of 35 ℃ and HRT of 25 h,the removal efficiency of COD was from 80% to 85% during the anaerobic process（UASB）.For the optimized SBR treatment conditions（influent 15 min,reaction 480 min,precipitation 60 min,effluent 15 min,idle 810 min）,the removal efficiency of COD,NH4^＋-N and TN in livestock wastewater in SBR were 91.8%,98.7% and 71.6%,respectively.The effluent COD was less than 180 mg·L^-1,NH4^＋-N 15 mg·L^-1,TN 50 mg· L^-1,meeting the Discharge Standard of Pollutants for Livestock and Poultry Breeding（GB 18596-2001）.The nitrite accumulation occurred and shortcut nitrification denitrification was the main way of nitrogen removal.

关 键 词：畜禽养殖废水 SBR 脱氮 短程硝化反硝化 

分 类 号：X703.1[环境科学与工程—环境工程]