负压蒸发-吹脱组合新技术处理垃圾沥滤液高浓度氨氮实验研究  

Experimental study on treatment of high concentration ammoniacal nitrogen in landfill leachate by negative pressure evaporation-stripping combined technology

作　　者：赵贤广 杨世慧 邱明建 郭智 ZHAO Xian-guang;YANG Shi-hui;QIU Ming-jian;GUO Zhi(School of Environmental Science and Engineering,Nanjing Tech University,Nanjing 211800,China;CECEP Engineering Technology Research Institute Co.,Ltd.,Beijing 100082,China)

机构地区：[1]南京工业大学环境科学与工程学院,江苏南京211800 [2]中节能工程技术研究院有限公司,北京100082

出　　处：《现代化工》2020年第2期187-190,195,共5页Modern Chemical Industry

摘　　要：采用"负压蒸发-吹脱"组合新技术处理垃圾沥滤液,通过优化实验运行参数,研究不同条件下垃圾沥滤液氨氮的脱除效率。结果表明,当负压蒸发温度为67℃、真空度为-0. 08 MPa、吹脱气液比为1 000∶1、吹脱温度为67℃时,经负压蒸发后,沥滤液出水氨氮质量浓度由2 621. 6 mg/L降至500 mg/L左右;进一步吹脱处理后,最终出水氨氮质量浓度在150 mg/L以下,氨氮总脱除效率可达96%以上。A new"negative pressure evaporation-stripping"combining technique is used to treat with leachate from waste incineration power plant.The experimental parameters are optimized and the removal efficiency of ammoniacal nitrogen is investigated under different conditions.The optimized operation conditions are as follows:the temperature is at 67℃and vacuum pressure is-0.08 MPa for the negative pressure evaporation,the gas-liquid ratio for air stripping is 1 000∶1,and the stripping temperature is at 67℃.The concentration of ammoniacal nitrogen in leachate decreases from 2 621.6 mg·L-1 to about 500 mg·L-1 after experiencing negative pressure evaporation,and drops again to less than150 mg·L-1 after stripping treatment.Total removal efficiency of ammoniacal nitrogen exceeds 96%.

关 键 词：负压蒸发 吹脱 垃圾沥滤液 氨氮 

分 类 号：X703.1[环境科学与工程—环境工程]