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首页> 外文期刊>Journal of water reuse and desalination >Heterotrophic nitrification and aerobic denitrification using pure-culture bacteria for wastewater treatment
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Heterotrophic nitrification and aerobic denitrification using pure-culture bacteria for wastewater treatment

机译：用纯培养细菌进行废水处理的异养硝化和有氧脱氮

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摘要

Due to the high water demand and unsustainable water resource, wastewater reclamation and wastewater treatment prior to discharge have become current important issues. Various treatment technologies, such as biological processes, have been improved as alternatives. In this study, the biological nitrogen removal system using pure-culture Bacillus licheniformis was developed and used as an internal treatment unit in an aquarium to improve the effluent quality for water reuse. The efficiencies for NH4-N and total nitrogen (TN) removal and the quality of treated water verified the occurrence of heterotrophic nitrification and aerobic denitrification; the nitrification rate was 0.84 mg/L-h and the denitrification rate was 0.62 mg/L-h. The maximal NH_4-N and TN removal efficiencies were approximately 73% at the influent NH_4-N of 30mg/L. However, the other competitive heterotroph of Pseudomonas sp. was observed, which resulted in dramatically decreasing efficiencies and an enlarged ratio of carbon consumption and nitrogen removal. Although the overall performance of the B. licheniformis system was lower than the system using mixed-culture nitrifying and heterotrophic denitrifying microorganisms, the advantages of the B. licheniformis system were ease of operation and the fact that it is a land-limited treatment system. The research is ongoing to enhance performance and maintain excellent efficiency in a long-term operation.
机译：由于高水需求和不可持续的水资源，排放前的废水填海和废水处理已成为当前的重要问题。各种治疗技术，如生物过程，已作为替代方案得到改善。在该研究中，开发了使用纯培养芽孢杆菌的生物氮去除系统，并用作水族箱中的内部治疗单元，以提高水再利用的污水质量。 NH4-N和总氮（TN）去除的效率和处理水的质量验证了异养硝化和有氧脱氮的发生;硝化速率为0.84mg / L-H，脱氮率为0.62mg / L-H。最大NH_4-N和TN去除效率在30mg / L的流入NH_4-N处约73％。但是，其他竞争性杂种术企业杂志SP。观察到，导致效率显着降低和碳消耗和氮气的扩大比率。虽然B.嗜睡系统的整体性能低于使用混合培养硝化和异养的反硝化微生物的系统，但B.Licheniformis系统的优点是易于操作，并且它是土地有限的处理系统的事实。该研究正在进行，以提高性能，并在长期运行中保持卓越的效率。

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