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首页> 外文期刊>Chemosphere >Decomposition And Mineralization Of Aquatic Humic Substances (ahs) In Treating Landfill Leachate Using The Anammox Process
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Decomposition And Mineralization Of Aquatic Humic Substances (ahs) In Treating Landfill Leachate Using The Anammox Process

机译：厌氧氨氧化法处理垃圾渗滤液时水生腐殖质（ahs）的分解和矿化

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摘要

Aquatic humic substance (AHS) in landfill leachate is resistant to biodegradation, especially in anaerobic habitats. However, we reported here for the first time that AHS was completely biodegraded with the anaerobic ammonium oxidation (Anammox) process. As a result of aromatic-ring cleavage and mineralization, carboxylic and aliphatic organics were significantly produced, the contents of chromophores such as quinoid and ketone were remarkably decreased to decolorize the leachate, and produced carbon dioxide along with increasing carbonate was clearly presented. Of the degraded AHS of 137 mg L~(-1) 51 mg L~(-1) was owed to the oxidation with sulfate of 76 mg L~(-1) as electron acceptor, and the rest to other metabolic mechanism. Isolation and identification of heterotrophic bacteria revealed a diversified consortium comprising four facultative anaerobic species, Bacillus sp., Paenibacillus sp., Bacteroides sp. and Staphylococcus sp., without sulfate-reducing bacteria detected. Their contribution to AHS biodegradation and sulfate reduction under the special conditions with high oxidization-reduction potential and insufficient electron acceptors has not been known yet. Further work is underway to investigate their properties and respective duties in the consortium.
机译：垃圾渗滤液中的水生腐殖质（AHS）具有抗生物降解性，特别是在厌氧生境中。但是，我们在这里首次报道了AHS已通过厌氧铵氧化（Anammox）工艺被完全生物降解。芳环断裂和矿化的结果是，大量产生了羧酸和脂肪族有机物，发色团（如醌类和酮）的含量显着降低，使渗滤液脱色，并清楚地显示了产生的二氧化碳和碳酸盐的增加。降解的AHS 137 mg L〜（-1）中有51 mg L〜（-1）是由于76 mg L〜（-1）的硫酸盐作为电子受体被氧化，其余归因于其他代谢机制。异养细菌的分离和鉴定显示了一个多元化的财团，包括四个兼性厌氧菌种，芽孢杆菌属，Paenibacillus属细菌，拟杆菌属。和葡萄球菌，未发现硫酸盐还原菌。在具有高氧化还原电位和不足电子受体的特殊条件下，它们对AHS生物降解和硫酸盐还原的贡献尚不清楚。目前正在进行进一步的工作，以调查其财产和财团的职责。

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