内环境调节层对厌氧生物反应器填埋场中氮转化的影响  

Effect of Environment Adjustment Layers on Nitrogen Transformation in Anaerobic Bioreactor Landfills

作　　者：何正坤[1] 宋博宇[2,3] 朱南文[1] 董军[3] 

机构地区：[1]上海交通大学环境科学与工程学院,上海200240 [2]轻工业环境保护研究所,北京100089 [3]吉林大学环境与资源学院,地下水资源与环境教育部重点实验室,长春130021

出　　处：《环境科学》2017年第4期1551-1557,共7页Environmental Science

基　　金：国家自然科学基金项目(41272253);环境保护公益性行业科研专项(2011467010)

摘　　要：为探究内环境调节层对厌氧生物反应器填埋场内环境和氮组分的长效影响,特设矿化垃圾+重质碳酸钙、矿化垃圾+天然沸石这2种内环境调节层分别置入模拟反应器R2和R3中,同时设R1(不含内环境调节层)作为对照,监测分析390 d内固相垃圾和渗滤液中氮组分的变化.结果表明,R1、R2和R3中pH、碱度、氧化还原电位(Eh)、含水率(MS)的大小关系分别为pH(R2)>pH(R3)>pH(R1)、碱度(R2)>碱度(R3)>碱度(R1)、Eh(R2)<Eh(R3)<Eh(R1)、MS(R3)>MS(R2)>MS(R1).R1、R2和R3中垃圾全氮降解转化率为79.2%、82.3%和88.5%,氨氮为48.3%、60.1%和67.7%,硝态氮为38.5%、44.2%和53.4%;渗滤液中总氮、氨氮和硝态氮的浓度对比分别为TN(R3)<TN(R2)<TN(R1)、NH_4^+-N(R3)<NH_4^+-N(R1)<NH_4^+-N(R2)和NO_3^--N(R3)<NO_3^--N(R2)<NO_3^--N(R1).总体看来,矿化垃圾+重质碳酸钙、矿化垃圾+天然沸石组成的内环境调节层均能长期优化内环境,为氮的降解转化提供有利条件,而矿化垃圾+天然沸石不仅能促进垃圾和渗滤液中氮组分的降解转化,还能一定程度上控制渗滤液循环造成的氨氮累积.To investigate the perennial effect of environment adjustment layers on the interior environment and nitrogen transformation in anaerobic bioreactor landfills,three sets of simulated anaerobic bioreactor landfills and two kinds of environment adjustment layers of mineralized refuse with heavy calcium carbonate（R2） and mineralized refuse with natural zeolites（R3） were designed and established.The degradation and transformation of nitrogen in waste and leachate had been monitored for 390 days.The results showed that,the value orders of pH,alkalinity,oxidation reduction potential and moisture content（MS） were pH（R2） pH（R3） pH（R1）,alkalinity（R2） alkalinity（R3） alkalinity（R1）,Eh（R2） Eh（R3） Eh（R1） and MS（R3） MS（R2） MS（R1）.In R1,R2 and R3,the degradation rates of total nitrogen,ammonia nitrogen,nitrate nitrogen in waste were 79.2%,82.3% and88.5%,48.3%,60.1% and 67.7%,38.5%,44.2% and 53.4%, respectively.Concentration comparison results of total nitrogen,ammonia nitrogen and nitrate nitrogen in leachate were TN（R3） TN（R2） TN（R1） 、NH_4~＋-N（R3） NH_4~＋-N（R1） NH_4~＋-N（R2） 和NO_3^--N（R3） NO_3^--N（R2） NO_3^--N（R1）.Additionally,both of mineralized refuse with heavy calcium carbonate and mineralized refuse with natural zeolites could long-term adjust and optimize the interior environment of anaerobic bioreactor landfills for the degradation and conversion of nitrogen.Mineralized waste with natural zeolite could not only promote the degradation and transformation of nitrogen components in waste and leachate,but also control the accumulation of ammonia nitrogen through leachate recirculation.

关 键 词：内环境 调节层 氮 厌氧生物反应器填埋场 转化 

分 类 号：X705[环境科学与工程—环境工程]