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厌氧消化中腐殖酸对H2S产量的抑制机制
Inhibition mechanisms of humic acid on the production of hydrogen sulfide during anaerobic digestion
投稿时间:2017-09-20  修订日期:2018-04-05
DOI:
中文关键词:  农村生活垃圾  厌氧消化  腐殖酸  H2S  还原力
英文关键词:rural solid waste  anaerobic digestion  humic acid  hydrogen sulphate (H2S)  reducing power
基金项目:
作者单位E-mail
詹咏 上海理工大学 环境与建筑学院 jannet6@163.com 
熊丹 上海理工大学 环境与建筑学院 982319285@qq.com 
董滨 同济大学 环境科学与工程学院 woshiwutuotuo@163.com 
黄婷 上海理工大学 环境与建筑学院  
江沛 上海理工大学 环境与建筑学院  
王玥 上海理工大学 环境与建筑学院  
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中文摘要:
      为了揭示腐植酸对H2S产量的抑制机制,设计了生活垃圾中添加腐殖酸的厌氧消化实验,并为排除其他因素干扰,将生活垃圾中的含硫物质以化学药剂硫酸钠和牛血清白蛋白代替分别与腐殖酸进行厌氧消化实验,同时测定了消化前后腐殖酸得失电子能力,判断腐殖酸是否会抑制厌氧消化过程中H2S的产生。研究结果表明:在厌氧消化实验中通过对腐殖酸的添加发现H2S产量明显降低;在牛血清白蛋白组实验中,H2S的去除率达到83.56%,硫酸钠组实验中H2S去除率只有24.20%;而测定腐殖酸得失电子实验中,厌氧消化后的腐殖酸得电子能力明显低于厌氧消化前,表明腐殖酸在厌氧消化过程中参与了电子的争夺,H2S的生成亦须得到电子,故腐殖酸在H2S的生成阶段通过抢夺电子而在源头上抑制了H2S生成。
英文摘要:
      The tests of anaerobic co-digestion of RSW and humic acid were designed and conducted to investigate the inhibition mechanisms of humic acid on H2S production during anaerobic digesiton. , The sulfur content of RSW was replaced by bovine serum albumin(BSA) and sodium sulfate, respectively, to eliminate the disruption of other compositions, and the tests consisted of anaerobic co-digestion of humic acid and BSA, and humic acid and sodium sulfate. The electron resistance of humic, humic acid electron acceptor model-AQDS and BSA were measured by an electrochemical cell. The results indicated that the production of H2S decreased remarkably by the addition of humic acid. The removal rate of H2S in the BSA group was 83.56%, while the sodium sulfate group was only 24.20%. Electron acceptors of humic acid after anaerobic digestion was significantly lower than those before anaerobic digestion, demonstrating that humic acid played the role of electron transfer during anaerobic digestion. Since the electrons are also needed in the formation of H2S, therefore, humic acid inhibits H2S at the source of its formation by snatching electrons.
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