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  • 刘钊,党岩,田皓中.外加电势强化厌氧氨氧化工艺处理垃圾焚烧渗沥液短程硝化出水[J].环境工程学报,2019,13(7):1670-1677.DOI:10.12030/j.cjee.201902093    [点击复制]
  • LIU Zhao,DANG Yan,TIAN Haozhong.Enhanced biotreatment of partial nitrified incineration leachate by applying electric potential in anammox system[J].,2019,13(7):1670-1677.DOI:10.12030/j.cjee.201902093   [点击复制]
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外加电势强化厌氧氨氧化工艺处理垃圾焚烧渗沥液短程硝化出水
刘钊,党岩,田皓中
0
(北京林业大学,水体污染源控制技术北京市重点实验室,污染水体源控制与生态修复技术北京市高等学校工程研究中心,北京 100083)
摘要:
利用外加电势强化厌氧氨氧化处理垃圾焚烧渗沥液短程硝化出水,研究外加电势对系统脱氮及有机物去除的影响。结果表明,在外加电势为0.06 V时,TN的去除率由43.2%提升至71.3%,COD的去除率由12.1%提升至24.4%。渗沥液中分子质量大于20 kDa的有机物在外加电势的作用下被部分降解成分子质量相对较小的有机物。外加电势也会刺激微生物产生更多的EPS且能提高其中PN/PS的比值,这有利于厌氧氨氧化菌在电极表面的生长和富集,增强微生物的活性。电极生物膜中细胞色素c(Cyt-c)、亚硝酸盐还原酶(Nir)、肼合成酶(HZS)和肼脱氢酶(HDH)4种厌氧氨氧化菌的功能酶的活性也在外加电势的作用下得到了提升。
关键词:  垃圾焚烧渗沥液  厌氧氨氧化  外加电势  脱氮
DOI:10.12030/j.cjee.201902093
投稿时间:2019-02-24
基金项目:国家自然科学基金资助项目51678051;国家水体污染控制与治理科技重大专项2018ZX0731007国家自然科学基金资助项目(51678051);国家水体污染控制与治理科技重大专项(2018ZX0731007)
Enhanced biotreatment of partial nitrified incineration leachate by applying electric potential in anammox system
LIU Zhao,DANG Yan,TIAN Haozhong
(Engineering Research Center for Water Pollution Source Control and Eco-Remediation, Beijing Key Laboratory for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China)
Abstract:
The electric potential (EP) was applied in anammox system to enhance its biotreatment of partial nitrified leachate from municipal solid waste (MSW) plant. The effects of applied EP on total nitrogen (TN) and organic matter removal were investigated. The results showed that at 0.06 V electric potential applied in the anammox system, TN removal and COD efficiencies increased from 43.2% to 71.3% and 12.1% to 24.4%, respectively. Under the effect of applied EP, the macromolecules with molecular weight > 20 kDa in the leachate were degraded into low molecular weighted organics. EP applied could stimulate the microbes, promote the extracellular polymeric substances (EPS) production, and improve the protein (PN)/polysaccharide (PS) ratio, which was conducive to anammox bacteria growth and enrichment on the electrode surface and microbial activity enhancement. Moreover, EP application also strengthened functional enzyme activity of anammox bacteria, such as the Cyt-c in electrode biofilm, Nir, HZS and HDH, and accelerated the rate of electron transfer.
Key words:  leachate from MSW incineration plant  anammox  applied electric potential  nitrogen removal