摘要
采用两级厌氧好氧活性污泥法(A/O)与活性污泥浸没式膜生物反应器(AS-SMBR)结合的生化处理系统和纳滤(NF)深度处理系统,处理BOD5/NH3-N比为0.13～0.22,BOD5/COD比仅0.11左右的老龄化垃圾渗滤液。在水力停留时间不变的条件下,采用同步培养驯化法,控制生化系统DO值在3～4 mg/L,回流比为400%～500%,pH≥7.2,考察了处理系统对垃圾渗滤液中主要污染物的去除情况和MLSS、pH和SV30等运行指标的变化情况,结果表明,生化系统出水的NH3-N去除率>99%,COD平均去除率>50%;NF系统出水的COD去除率≥91%,NH3-N浓度<8 mg/L,且回收率≥75%,出水完全达到GB16889-2008标准中表2的污染物浓度限值和提标改造的要求。
Two-stage A/O process combining with AS-SMBR and NF treatment systems were adopted to treat the aged-landfill leachate which had a BODJNH3-N propotion of 0. 13 - 0.22, and the BODJCOD was only O. 11. It was necessary to control DO value of biochemical system between 3 - 4 mg/L, reflux ratio at 400% - 500% , and pH value≥7.2 at the same HRT. The index of main contaminant of landfill leachate and the changes of MLSS, pH and SV30 during commissioning were investigated. The results show that the removal rate of ammonia in biochemical system 〉 99% , and average COD removal rate 〉 50% , and the removal rate of COD in NF system≥91% , the concentration of ammonia 〈 8 mg/L,simultaneously, coefficient of recovery was ≥75% , effluent of treatment system could reach the standard of GB16889-2008 completely and meet the needs of upgrading oroiect.
出处
《环境工程学报》
CAS
CSCD
北大核心
2013年第3期843-847,共5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(2012ZX07318-001)
