【摘要】 研究了生活污水中典型有机污染物糖类、蛋白质、油脂以及直链烷基苯磺酸钠(LAS)对生活污水中COD的贡献率,采用硝酸盐利用速率法(NUR)测定了活性污泥数学模型(ASMs)中的有机水质特性参数,分析了单一糖类、蛋白质、油脂、LAS对有机水质特性参数的影响,并给出了生活污水中这4种有机污染物与ASMs有机水质特性参数SS、XS、SI、XI的相关关系.结果表明,反硝化条件下异养菌产率系数为0.683;蛋白质、糖类、油脂和LAS分别占COD的24%~35%、17%~35%、5.78%~10.56%和3.77%~7.23%,是污水中COD的主要化学组成成分;该污水中的快速生物降解物质占总COD的22%~29%,慢速可生物降解物质占29%~38%;生活污水中糖类、蛋白质、油脂、LAS这4种典型有机物的浓度与ASMs的水质特性参数SS、XS、SI、XI的相关性较好,相关系数>0.9.更多还原

【Abstract】 The contribution of typical organic matters such as proteins,sugars,lipids and linear alkylbenzene sulfonate(LAS) to COD of the domestic wastewater was investigated.Nitrate utilization rate was used to determine wastewater characteristic parameters.Relationship between these typical organic matters and wastewater characteristic parameters(S_S,X_S,S_I,X_I) in activated sludge models were investigated.The results showed that YH of activated sludge under denitrifying conditions was 0.683.Proteins,sugars,lipids and LAS accounted for 24%-35%,17%-35%,5.78%-10.56% and 3.77%-7.23% of the total COD,respectively.It indicated that these four pollutants were the main COD source in the domestic wastewater.SS and XI were in the ranges of 22%-29% and 29%-38% of the total COD,respectively.Concentrations of the four typical target organic matters(proteins,sugars,lipids and LAS) correlated well with the wastewater characteristic parameters(S_S,X_S,S_I,X_I) of activated sludge models(ASMs) with the correlative coefficients above 0.9.更多还原