摘要
垃圾渗沥液含有高浓度的氨氮、有机氮,在典型垃圾渗沥液处理工艺中,各阶段氮的转化过程有较大区别。混凝沉淀处理可以去除部分有机氮,厌氧处理中氮的转化主要是氨化反应,有机氮经过氨化反应后转化为小分子的有机氮和氨氮,好氧处理系统中主要是硝化反硝化反应,氨化微生物在好氧条件下将有机氮转化氨态氮。一些颗粒有机氮会随剩余污泥排出,膜深度处理过程中,有机氮、氨氮、硝酸盐氮绝大部分会进入到浓缩液里,高级氧化可以将大分子有机氮降解为小分子有机氮和氨氮,焚烧处理可以将有机氮转化为氮氧化物。
Landfill leachate contains high concentrations of ammonia nitrogen and organic nitrogen. In the typical landfill leachate treatment process, the conversion process of nitrogen at each stage is quite different. Coagulation sedimentation treatment can remove some organic nitrogen, the transformation of nitrogen in the anaerobic treatment is mainly ammonification reaction, organic nitrogen is converted into small molecular organic nitrogen and ammonia nitrogen after ammonification reaction. Ammonifying microorganisms transform organic nitrogen into ammonia nitrogen under aerobic conditions. Some of the granule organic nitrogen is excreted with residual sludge. During the depth treatment of the membrane, the organic nitrogen, ammonia nitrogen and nitrate nitrogen will mostly go into the concentrate. Advanced oxidation process can make macromolecular organic nitrogen into small molecular organic nitrogen and ammonia nitrogen. Incineration can convert organic nitrogen to nitrogen oxides.
作者
黄万金
杜昱
丁西明
姜宗海
詹爱平
Huang Wanjin;Du Yu;Ding Ximing;Jang Zonghai;Zhan Aiping(North China Municipal Engineering Design and Research Institute Co.Ltd.,Tianjin 300381)
出处
《环境卫生工程》
2019年第2期77-80,共4页
Environmental Sanitation Engineering
关键词
垃圾渗沥液
总氮
有机氮
转化过程
landfill leachate
total nitrogen
organic nitrogen
conversion process
