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垃圾渗滤液补充反硝化碳源强化脱氮效果
Enhancement in nitrogen removal with landfill leachate as supplemental carbon source for denitrification
投稿时间:2018-08-12  修订日期:2018-12-23
DOI:
中文关键词:  垃圾渗滤液  外加碳源  反硝化  脱氮  水解酸化
英文关键词:landfill leachate  external carbon source  denitrification  nitrogen removal  hydrolysis and acidification
基金项目:水体污染控制与治理科技重大专项(2017ZX07101-002), 国家国际科技合作专项项目(2016YFE0123500-003)
作者单位E-mail
徐晨璐 青岛理工大学环境与市政工程学院 chluxu@163.com 
尹志轩 青岛理工大学环境与市政工程学院 yzxqut@163.com 
李春雨 青岛理工大学环境与市政工程学院  
毕学军 青岛理工大学环境与市政工程学院  
顾瑞环 青岛首创瑞海水务有限公司  
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中文摘要:
      垃圾渗滤液中含有大量易被微生物利用的挥发性脂肪酸,若其可以作为城镇污水处理厂的补充碳源,将对降低碳源投加成本和实现垃圾渗滤液的资源化利用有重要意义。在实际城镇污水处理厂考察了垃圾渗滤液补充进水碳源的脱氮效果,并进一步对比了传统碳源(甲醇、乙酸钠)、垃圾渗滤液及垃圾渗滤液在不同pH条件下产生的水解酸化液作为碳源时的反硝化效果。结果表明,实际城镇污水处理厂投加乙酸钠作为补充碳源时总氮去除率仅提高3%左右,而在进水中混合垃圾渗滤液后提高了约10%。在批次实验中,垃圾渗滤液与乙酸钠作碳源时NO3--N去除率均>97%,但垃圾渗滤液为碳源时最大比反硝化速率高达8.8 mg N?(g MLSS?h) -1,是乙酸钠为碳源时的1.7倍。垃圾渗滤液中性和碱性水解酸化液为碳源时,反硝化效果相差不大,最大比反硝化速率为4.5-4.8 mg N?(g MLSS?h) -1,NO3--N去除率仅为70%左右。垃圾渗滤液或其水解酸化液是否可以作为强化脱氮效果的补充碳源取决于基质本身的性质。
英文摘要:
      Because containing large amount of readily biodegradable volatile fatty acids, landfill leachate is expected to be used as carbon source for denitrification in municipal wastewater treatment plant, producing great significance to the cost reduction of external carbon source and resource utilization of landfill leachate. Nitrogen removal with landfill leachate as supplemental carbon source was investigated in municipal wastewater treatment plant. The denitrification efficiencies using traditional carbon sources (methanol and sodium acetate), landfill leachate, and hydrolysis acidification liquor of landfill leachate under different pH conditions as substrates were further compared. The results show that total nitrogen removal efficiency has been only increased 3% with sodium acetate as external carbon source, but it has been increased about 10% by mixing landfill leachate into the influent in the actual municipal wastewater treatment plant. In the batch tests, the NO3--N removal efficiencies have been more than 97% with landfill leachate or sodium acetate as carbon sources. But the maximum specific denitrification rate of landfill leachate as carbon source (8.8 mg N?(g MLSS?h) -1) has been 1.7 times higher than that of sodium acetate. There is almost no difference of the denitrification efficiencies when landfill leachate hydrolysis acidification liquor under neutral or alkaline conditions has been used as carbon sources, with 4.5-4.8 mg N?(g MLSS?h) -1 of maximum specific denitrification rate and 70% of nitrate removal efficiency. Whether landfill leachate and its hydrolysis acidification liquor could be used as an alternative external carbon source for nitrogen removal enhancement depends on the characteristics itself.
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