摘要
以低C/N比污水为处理对象、基于物料平衡分析,研究了在MUCT工艺中硝化液内循环比与COD降解转化、PHA的代谢、磷的转移以及氮的转化等4个过程的关系。进水COD浓度恒定为（290±10）mg/L,TN浓度恒定为（55±0.5）mg/L,TP浓度恒定为（7.0±0.5）mg/L,改变硝化液内循环比,测定各反应段及出水COD、TN、TP浓度以及污泥中的PHA含量。试验结果表明：厌氧段去除的COD的63%~67%左右转化为PHA,在第二缺氧段和好氧段,PHA被消耗用于吸收污水中的磷,硝化液内循环比对第二缺氧段的消耗量有较明显的影响;硝化液内循环比对磷的释放过程影响较小,是第二缺氧段的吸磷过程的主要影响因素。
Based on mass balances,relationships between the nitrified liquor recycling condition and COD removal,phosphorus release,phosphorus uptake,nitration,denitrification were discussed by using low C/N rate wastewater as the research object,in which the influent chemical oxygen demand concentration was stabilized at（290±10）mg/L,the influent total nitrogen（TN） concentration was stabilized at（55±0.5）mg/L,the influent total phosphorus（TP） concentration was stabilized at（7.0±0.5）mg/L.The nitrified liquor recycling condition was changed to compare the effluent total nitrogen and total phosphorus concentration.The experimental results show that 63%~67% of the COD removed in the anaerobic zone can be identified as PHA;in the second anoxic and aerobic zone,the PHA has been consumed for phosphate uptake,consumption of PHA is significantly affected by nitrified liquor recycling condition in second anoxic zone;nitrified liquor recycling condition has little effect on phosphorus release,but it is a key factor affecting phosphorus uptake in the second anoxic zone.
出处
《当代化工》
CAS
2012年第3期308-311,327,共5页
Contemporary Chemical Industry
关键词
MUCT工艺
硝化液内循环比
物料平衡
转化
MUCT process
Nitrified liquor recycling condition
Mass balance
Conversion
