SBBR与人工湿地组合工艺脱氮除磷  

Biological phosphorus and nitrogen removal by combined process of sequencing biofilm batch reactor and constructed wetland

作　　者：刘舒巍 张从轩 杨兴桐 李媛[1] 王晓慧[1] 海热提[1] 

机构地区：[1]北京化工大学,北京市水处理环保材料工程技术研究中心,北京100029

出　　处：《环境工程学报》2017年第8期4527-4534,共8页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51408020);北京市科技计划项目(Z151100002115011);国家国际科技合作专项(2013DFR60250);中央高校基本科研业务费专项资金项目(JD1604,JD1503)

摘　　要：以人工合成污水为原水,以第二代生态碳纤维作为SBBR填料,考察了SBBR和人工湿地组合工艺脱氮除磷的性能。结果表明,SBBR系统能够实现同步硝化反硝化且可出现明显的释磷、吸磷现象,当SBBR厌氧75 min,曝气240 min,溶解氧在3.07~4.09 mg·L^(-1)之间时,组合工艺实现了能耗最低情况下的达标出水。此模式下,SBBR系统对COD、氨氮、TN和TP的去除率分别达到94.6%、94.8%、85.4%和61.1%。人工湿地采取间歇运行模式以进一步脱氮除磷,其中进水12h,放空复氧12 h,稳定后湿地对COD、氨氮、TN和TP的去除率分别达到39.3%、47.3%、61.5%和70.7%。此模式下整体组合工艺表现出了良好的脱氮除磷性能,系统出水COD、氨氮、TN和TP浓度均值分别为13.89、0.535、2.047和0.286 mg·L^(-1),去除率分别能够达到96.7%、97.3%、94.4%和88.6%。The behaviors of biological phosphorus（ P） and nitrogen（ N） removal in a lab-scale combined process using a sequencing biofilm batch reactor stuffed with second-generation carbon fiber and a constructed wetland were investigated during the treatment of artificial wastewater. The experimental results clearly showed that when the aeration time was 75 min,the aerobic time was 240 min,the dissolved oxygen was 3. 07 to 4. 09mg·L^-1,and the best treatment efficiency was achieved. When the SBBR was running under the best operating conditions,simultaneous nitrification and denitrification was steady,as was phosphorus release and absorption.The removal efficiencies of COD,NH4^＋-N,TN,and TP reached 94. 6%,94. 8%,85. 4%,and 61. 1%,respectively. For the constructed wetland,intermittent operation was adopted to enhance the effect of nitrogen and phosphorus removal. Each cycle of intermittent operation included a flooding period of 12 h and a drying period of 12 h. The removal of COD,NH4-＋-N,TN,and TP over the operation period was achieved at average rates of39. 3%,47. 3%,61. 5%,and 70. 7%,respectively. With this system,the established combined process achieved good results for N and P removal; the average effluent COD,NH4-＋-N,TN,and TP concentrations were13. 89,0. 535,2. 047,and 0. 286 mg·L^-1,corresponding to removal rates of 96. 7%,97. 3%,94. 4%,and88. 6%,respectively.

关 键 词：SBBR 人工湿地 脱氮除磷 参数优化 生态碳纤维 

分 类 号：X703[环境科学与工程—环境工程]