AO-SBR短程硝化反硝化垃圾渗滤液预处理中试应用  

Pilot-scale test of partial nitrification-denitrification-based AO-SBR process for landfill leachate pretreatment

作　　者：赵晴[1] 周浩 吕慧[2,3] 张鑫 孟了[5] 刁兴兴[6] ZHAO Qing;ZHOU Hao;LYU Hui;ZHANG Xin;MENG Liao;DIAO Xingxing(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China;School of Environmental Science and Engineering,Sun Yat-Sen University,Guangzhou 510275,China;Shenzhen Research Institute of Sun Yat-Sen University,Shenzhen 518057,China;School of Civil and Architecture Engineering,Heilongjiang Institute of Technology,Harbin 150050,China;Shenzhen Xiaping Municipal Solid Waste Landfill Site,Shenzhen 518047,China;Shenzhen Lisai Development Co.Ltd.,Shenzhen 518029,China)

机构地区：[1]广州大学土木工程学院,广州510006 [2]中山大学环境科学与工程学院,广州510275 [3]中山大学深圳研究院,深圳518057 [4]黑龙江工程学院土木与建筑工程学院,哈尔滨150050 [5]深圳市下坪固体废弃物填埋场,深圳518047 [6]深圳市利赛实业发展有限公司,深圳518029

出　　处：《环境工程学报》2021年第2期545-552,共8页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(42077155);黑龙江省自然科学基金资助项目(QC2017060);深圳市科技计划项目(JSGG20170824101458515);哈尔滨市科技创新人才研究专项资金项目(2017RAQXJ020)。

摘　　要：针对某垃圾渗滤液处理厂现有氨吹脱预处理工艺存在的脱氮效果不佳、运行费用高、易产生二次污染等问题,开展了基于短程硝化反硝化的AO-SBR垃圾渗滤液预处理中试研究,考察了反应系统的脱氮效能,分析了氮素的迁移转化途径,计算长期稳定时预处理工艺的主要运行成本。在中试实验中,垃圾渗滤液进水氨氮浓度为1000~2500 mg·L^−1,控制SBR池pH为6.5~7.5、DO为1.0~1.5 mg·L^−1,投加甲醇调节进水碳氮比为1.4~2.0,通过FNA抑制实现了短程硝化反硝化中试系统的启动和稳定运行。稳定阶段系统中的亚硝化率为90%以上,氨氮去除率为80%以上,总氮去除率为50%左右。典型周期氮元素平衡分析结果表明,通过短程硝化反硝化途径和硝化反硝化途径去除的总氮负荷分别占据总氮去除负荷的74.8%和13.5%。AO-SBR短程硝化反硝化作为垃圾渗滤液预处理工艺可以满足后续工艺流程进水要求,最终出水达到纳管标准,该垃圾渗滤液预处理工艺运行成本比氨吹脱降低约30%。短程硝化反硝化工艺替代氨吹脱工艺进行垃圾渗滤液预处理具有技术及经济可行性。以上研究结果可为垃圾渗滤液处理厂预处理工艺的升级改造提供技术支持。When ammonia stripping is used as pretreatment process of a landfill leachate treatment plant,the problems such as poor denitrification effect,high operation cost and secondary pollution will occur.A pilot study of partial nitrification-denitrification based AO-SBR process for landfill leachate pretreatment was carried out to solve the above problems.Its nitrogen removal efficiency was investigated,the nitrogen migration and transformation path of a typical cycle in the reactor was analyzed,the final effluent water quality and operation costs of pretreatment process were also calculated.The results showed that when the influent ammonia was 1000~2500 mg·L^−1,the pH of SBR tank was 6.5~7.5,DO was 1~1.5 mg·L^−1,the ratio of carbon to nitrogen was adjusted to 1.4~2.0 by adding methanol,the start-up and stable operation of the partial nitrificationdenitrification pilot system were realized.At the stable stage,the nitrification rate of the system reached above 90%,the removal rates of ammonia and total nitrogen were above 80%and around 50%,respectively.The nitrogen balance analysis indicated that 74.8%and 13.5%nitrogen loads were removed by the partial nitrification-denitrification and the complete nitrification-denitrification pathways,respectively.The effluent of partial nitrification-denitrification-based AO-SBR can meet the water inlet requirements of the subsequent processes,and the final water output can meet the pipe receiving standard.The main operating cost of AO-SBR was about 30%less than that of ammonia stripping process.It is technically and economically feasible to pretreat landfill leachate by partial nitrification-denitrification instead of ammonia stripping.This study provides technical support for upgrading the pretreatment process of landfill leachate treatment plant.

关 键 词：垃圾渗滤液预处理 中试 AO-SBR 短程硝化反硝化 

分 类 号：X703.1[环境科学与工程—环境工程]