外加碳源强化农村生活污水处理及成本分析  

Treatment with External Carbon Source and Cost Analysis Enhanced Rural Domestic Wastewater

作　　者：赵颖 ZHAO Ying(Chengdu Konggang Environmental Investment Co.,Ltd.,Chengdu 610299,China)

机构地区：[1]成都空港环境投资有限公司,四川成都610299

出　　处：《净水技术》2024年第12期111-118,共8页Water Purification Technology

摘　　要：以农村生活污水处理中具有代表性的序批式活性污泥(SBR)工艺和厌氧/缺氧/好氧(AAO)+膜生物反应器(MBR)工艺为考察对象,将固体葡萄糖和固体乙酸钠作为有机物外加碳源,通过药剂化验分析,对比葡萄糖、乙酸钠2种外加碳源的COD_(Cr)含量、BOD_(5)含量、溶解速度等,通过烧杯试验和一体化污水处理设备生产试验,对比2种外加碳源对污染物的去除效果及经济效益。结果表明,固体乙酸钠溶解速度为固体葡萄糖的2.3倍,COD_(Cr)含量为2.4倍。同样投加成本条件下,投加乙酸钠的TN去除率达96.3%,比葡萄糖高13%。投加相同COD_(Cr)当量条件下,投加乙酸钠的反硝化速率约为葡萄糖的1.3倍,TN去除率为87.2%,比葡萄糖高3.2%。投加乙酸钠的工艺出水TP去除率更高,具有更好的生物强化除磷作用。投加乙酸钠的污泥浓度增长率比葡萄糖低29%,污泥容积指数(SVI)值较平稳,污泥膨胀风险较低,适合作为外加碳源长期使用。The research focused on the representative sequencing batch reactor(SBR)process and anaerobic/anoxic/oxic(AAO)+membrane bioreactor(MBR)process in rural domestic wastewater.Glucose and sodium acetate were used as additional carbon sources for organic compounds.Through chemical analysis,the COD_(Cr) content,BOD_(5) content,dissolution rate,etc.of the two external carbon sources,glucose and sodium acetate,were compared.The removal efficiency and economic benefits of the two external carbon sources for pollutants were compared through jar test and integrated equipment for rural domestic wastewater.The results showed that the dissolution rate of sodium acetate was 2.3 times that of glucose,and COD_(Cr) content was 2.4 times.Under the same cost conditions,the removal rate of TN by adding sodium acetate was 96.3%,13%higher than glucose.Under the condition of adding the same COD_(Cr) content,the denitrification rate of sodium acetate was about 1.3 times that of glucose,the TN removal rate was 87.2%,3.2%higher than glucose.The removal rate of TP in effluent of the process flow adding sodium acetate was higher,the effect of biological enhanced phosphorus removal was better.The increase rate of sludge concentration with sodium acetate was 29%lower than glucose,the sludge volume index(SVI)value was relatively stable.The risk of sludge bulking was relatively low,sodium acetate was suitable for long-term use as an external carbon source.

关 键 词：农村生活污水 外加碳源 序批式活性污泥工艺(SBR) 厌氧/缺氧/好氧+膜生物反应器(AAO+MBR) 污染物去除 成本分析 

分 类 号：X799[环境科学与工程—环境工程]