集成式反应器SND对低碳氮比生活污水的深度脱氮效能及其动力学  

Advanced nitroge removal and kinetics for low carbon to nitrogen ratio sewage by SND in an integrated reactor

作　　者：邓时海[1] 李德生[1] 杨雪[1] 卢阳阳[1] 朱善斌[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《北京交通大学学报》2016年第1期49-55,共7页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(51278034);中央高校基本科研业务费专项资金资助(KCJB15016536)

摘　　要：以由实际生活污水配制的低C/N比生活污水为研究对象,在集成式反应器主反应区实现了同步硝化反硝化（SND）脱氮.考察了集成式反应器对低C/N比污水的脱氮效能.结果表明：DO=1.4～1.7mg/L,总HRT=18h（主反应区HRT=7.2h）,C/N=5时,NH4^＋-N可从15±2mg/L平均降至2.5mg/L,总氮可以从20±2mg/L平均降至3.4mg/L,TN处理负荷可达0.13kg TN/（m^3·d）,较同类低C/N比污水脱氮系统高;相同条件下连续运行时,出水NH4^＋-N和TN浓度稳定在0.8～3.0mg/L和1.4～4.7mg/L,去除率在80.2%～94.9%和76.5%～93.2%.以Monod方程为基础通过物料衡算求解出SND动力学方程并求得硝化过程氨氮饱和常数KNH4^＋-N=1.34mg/L,氨氮降解反应级数n=0.622 4,反硝化过程硝酸盐氮饱和常数KNO3^--N=0.71mg/L.分析表明：该SND系统内生物量充足、活性高,生物降解效率受底物浓度限制小,集成式反应器结构合理,可实现小水量低C/N比生活污水深度脱氮,为我国中小城镇生活污水深度处理提供技术支持和理论依据.Nitrogen removal and transformation for low carbon to nitrogen（C/N）ratio by SND in an integrated reactor were studied and analyzed.Results showed that total nitrogen（TN）and ammonia were decreased to 3.4mg/L and 2.5mg/L from 20±2mg/L and 15±2mg/L,respectively,at the conditions of DO=1.4-1.7mg/L,HRT=18h（7.2hin the first reaction zone）,C/N=5.Long-running experiment showed that TN and ammonia in effluent were stabilized in1.4-4.7mg/L and 0.8-3.0mg/L and the removal rate were in 80.2%-94.9% and 76.5%-93.2%,respectively.KNH4^＋-N=1.34mg/L,KNON3^--=0.71mg/L and n=0.622 4were obtained by simultaneous nitrification and denitrification（SND）dynamic model solving.The results indicated that nitrogen in low C/N ratio wastewater could be efficiently removed by SND system in the integrated reactor and the SND system was of operation stability and the ability to resist shock loading.The proposed technology was applicable for advanced nitrogen removal of low C/N ratio small discharge from small town.

关 键 词：市政工程 集成式反应器 同步硝化反硝化 低碳氮比污水 深度脱氮 

分 类 号：X703[环境科学与工程—环境工程]