零价铁对城市污泥和餐厨垃圾联合厌氧消化产甲烷的影响  

Effect of Zero-valent Iron on Methane Production by Combined Anaerobic Digestion of Municipal Sludge and Kitchen Waste

作　　者：经雪 程洁红 黄寿强 JING Xue;CHENG Jiehong;HUANG Shouqiang(School of Chemical and Environmental Engineering,Jiangsu University of Technology,Changzhou 213001,China)

机构地区：[1]江苏理工学院化学与环境工程学院,江苏常州213001

出　　处：《江苏理工学院学报》2020年第2期1-8,共8页Journal of Jiangsu University of Technology

基　　金：国家自然科学基金“含铬电镀废水构建磁性上转换光催化材料的研究”(21607101)。

摘　　要：城市污泥单独厌氧消化存在产甲烷效率低、停留时间长的缺点。将城市污泥和餐厨垃圾混合后协同厌氧消化,为提高厌氧消化产甲烷效率还加入了纯铁粉。在中温(39±1℃)厌氧消化30 d,考察纯铁粉不同投加量产甲烷效率。结果表明:随着纯铁粉投加量的增加,甲烷产量也随之增加,当系统中纯铁粉投加量为20 g/L时累计产甲烷量最大,达到330.07 m L/gVSS,比不外加任何铁元素的空白组提高了41%;厌氧消化第6天产生的挥发性有机酸是14 329.5 mg/L,比空白组提高52%;消化结束时,VS去除率最大达到40.6%,比空白组的VS去除率提高了47%,污泥达到稳定。表明外加铁能提高系统的甲烷产量。The single anaerobic digestion of urban sludge has the disadvantages of low methane production efficiency and long residence time.Municipal sludge and kitchen waste are municipal organic solid waste,which are mixed for anaerobic digestion.In order to improve the efficiency of methane production by anaerobic digestion,pure iron powder is also added.The methanogenic efficiency of pure iron powder with different dosage is investigated in 30 days of anaerobic digestion at medium temperature(39±1℃).The results showed that the methane production increased with the increase of the amount of pure iron powder,and the maximum cumulative methane production reached 330.07 ml/gVSS when the speculative amount of pure iron powder was 20 g/L,which is 41%higher than that of the blank group without any iron element.The volatile organic acids produced on the sixth day of anaerobic digestion were 14329.5 mg/L,which is 41%higher than that of the blank group.At the end of digestion,the maximum removal rate of VS is 40.6%,which was 47%higher than that of blank group,and the sludge was stable.It is shown that the addition of iron can increase the methane production of the system.

关 键 词：纯铁粉 厌氧消化 产甲烷 城市污泥 餐厨垃圾 

分 类 号：S216.4[农业科学—农业机械化工程]