Enhancing biotreatment of incineration leachate by applying an electric potential in a partial nitritation-Anammox system
Enhancing biotreatment of incineration leachate by applying an electric potential in a partial nitritation-Anammox system
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通过在部分亚硝化-厌氧氨氧化系统中施加电势来加强焚烧渗滤液的生物处理
DOI：
10.1016/j.biortech.2019.121311
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发表时间：
2019
影响因子：
11.4
通讯作者：
Smith Jessica A
中科院分区：
文献类型：
--
作者：
Liu Zhao;Sun Dezhi;Tian Haozhong;Yan Liangming;Dang Yan;Smith Jessica A
采用部分亚硝化-厌氧氨氧化系统，对垃圾焚烧厂厌氧渗滤液进行了电位强化生物处理。在最佳极压差为0.06 V时，总脱氮率达到71.9%，比不加极压的对照系统提高17.3%。EP对有机物的去除也有促进作用，尤其是渗滤液中分子量为20 kDa的大分子。喷施EP还促进了胞外聚合物的产生，提高了蛋白质/多糖的比例。高通量DNA测序结果表明，利用外加的极电极法可以使假丝酵母属的厌氧氨氧化细菌在电极上得到丰富。具有降解有机大分子潜力的异养反硝化菌在EP电极上的数量也比对照反应器多。这些结果表明，在厌氧氨氧化技术处理高氨氮和难降解有机物的实际废水中，应用EP可能是一种有用的策略。
An electric potential (EP) was applied to enhance biotreatment of anaerobically-treated leachate from municipal solid waste incineration plants using a partial nitritation-Anammox system. At an optimal EP difference of 0.06 V, total nitrogen removal efficiency reached 71.9%, 17.3% higher than the control system without an EP. Removal of organic matter was also stimulated with the EP, particularly macromolecules with molecular weight >20 kDa in the leachate. Applying EP also promoted production of extracellular polymeric substances and improved the protein/polysaccharide ratio. High-throughput DNA sequencing revealed that Anammox bacteria in the genus CandidatusKueneniawere enriched for on electrodes with the applied EP. Heterotrophic denitrifiers, which potentially could degrade organic macromolecules, were also more abundant on the electrodes with EP compared with the control reactor. These results show that applying an EP could be a useful strategy in Anammox technologies treating real wastewater high in ammonia and refractory organic compounds.