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首页> 外文期刊>Journal of Environmental Science and Health >Biological nitrogen removal of ammonia-rich centrate in batch systems
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Biological nitrogen removal of ammonia-rich centrate in batch systems

机译：分批系统中生物富氮浓缩液的生物脱氮

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摘要

This study addressed the removal of ammonia from recycled centrate via biological nitrification and denitrification in batch reactors. Nitrification was successful at ammonia feed concentrations up to 400 mg/L and carbon-to-nitrogen (C/N) ratios greater than 1. The use of pre-exposed biomass to ammonia-rich centrate reduced considerably the overall time required for nitrification, which was also reflected on the corresponding specific rates. The denitrification of naturally-generated nitrates proceeded smoothly, with methanol modestly outperforming acetate as external carbon source. Furthermore, simultaneous nitrification and denitrification (SND) was induced in the presence of readily biodegradable organic carbon (i.e., methanol or acetate) under aerobic conditions. Overall, total nitrogen removal from ammonia-rich centrate by biological methods was viable under the conditions investigated.
机译：这项研究解决了在间歇式反应器中通过生物硝化和反硝化从循环浓缩液中去除氨的问题。氨进料浓度高达400 mg / L且碳氮比（C / N）大于1时，硝化作用是成功的。使用预先暴露的生物质至富含氨的浓缩液可大大减少硝化所需的总时间，这也反映在相应的具体费率上。天然生成的硝酸盐的反硝化过程顺利进行，甲醇作为外部碳源的表现略胜于醋酸盐。此外，在有氧条件下，在易于生物降解的有机碳（即甲醇或乙酸盐）的存在下，同时进行硝化和反硝化（SND）。总体而言，在所研究的条件下，通过生物方法从富氨浓缩物中去除总氮是可行的。

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