摘要
设计了异波折板水解酸化-A2O一体化反应器,进行生活污水处理的实验研究。10个月的实验结果表明,系统的最佳水力停留时间(HRT)为8 h时,最适COD进水浓度为240~600 mg/L,最佳混合液回流比(r)-污泥回流比(R)为250%~100%。控制反应器于以上运行参数下,25±2℃所对应的COD、TN和TP去除率分别为96.84%、67.55%和81.92%。当温度降至7℃时,其COD、TP和TN分别降至86.35%、50.25%和65.68%。基于实验分析结果,阐明了一体化反应器高效性的机理在于异波折板水解酸化段具有高效传质特性和A2O段具有复合式活性污泥-接触氧化好氧池的特点。
Integrated reactor of opposite folded plate hydrolysis and acidification-A2O was designed to treat low strength sewage.The results of 10 months indicated that the optimal hydraulic retention time（HRT） was 8 h;the optimal influent COD concentration was 240~600 mg/L;the optimal mixed-liquor return ratio（r）-sludge return ratio（R） was 250%~100%.Under above conditions,the COD,TP and TN removal rates were 96.84%,67.55% and 81.92% at 25±2℃,respectively.When the temperature decreased to 7℃,the COD,TP and TN removal rates decreased to 86.35%,50.25% and 65.68% respectively.Based on the results of trial,the mechanisms of higher integrative reactor efficacy in treatment of low strength sewage were owed to high efficient mass-transfer of hydrolysis and acidification stage and the hybrid actived sludge-contact oxidation in aerobic tank at A2O stage.
出处
《环境工程学报》
CAS
CSCD
北大核心
2010年第3期503-507,共5页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(50778080)
云南省教育厅项目(08Z0065)
云南省科技厅项目(2009CD099)
关键词
异波折板
水解酸化
A2O一体化反应器
传质
opposite folded plate
hydrolysis and acidification
A2O
integrated reactor
mass-transfer
