Research on the application of heterotrophic nitrification-aerobic denitrification bacteria in membrane bioreactor (MBR)

IF 2 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Biotechnology Letters Pub Date : 2024-09-11 DOI:10.1007/s10529-024-03529-5

Tianrui Zhai, Tiantao Zhao, Yuhao Zhong, Peipei Chen, Guojian Li, Liang Teng, Lijie Zhang, Hao Liu

引用次数: 0

Abstract

Inoculating heterotrophic nitrification-aerobic denitrification bacteria (HN-AD) to enhance membrane bioreactor (MBR) efficiency may result in the loss of functional bacteria. Therefore, this study compares the application results of enhancing MBR with a self-designed biological amplifier coupled with HN-AD against the performance of conventional MBR. After enhancement, the MBR achieved a removal efficiency of 96.7% for NH₄⁺-N (100 mg/L) and 96.4% for COD (400 mg/L) in synthetic wastewater. There was a 33% increase in TN (100 mg/L) removal efficiency. The dominant bacteria in the MBR were Alcaligenes (48.4%) and Thauera (15.2%). Additionally, the abundance of denitrification genes (nirK, norB, nosZ) increased in the enhanced MBR, contributing to improved TN removal efficiency. The use of a biological amplifier effectively solved the problem of HN-AD loss in sewage treatment.

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异养硝化-好氧反硝化菌在膜生物反应器（MBR）中的应用研究

接种异养硝化-好氧反硝化细菌（HN-AD）来提高膜生物反应器（MBR）的效率可能会导致功能菌的损失。因此，本研究比较了利用自行设计的生物放大器和 HN-AD 增强膜生物反应器的应用效果与传统膜生物反应器的性能。强化后的 MBR 对合成废水中 NH4+-N (100 mg/L) 和 COD (400 mg/L) 的去除率分别达到 96.7% 和 96.4%。对 TN（100 毫克/升）的去除率提高了 33%。MBR 中的优势细菌是 Alcaligenes（48.4%）和 Thauera（15.2%）。此外，在增强型 MBR 中，反硝化基因（nirK、norB、nosZ）的丰度也有所增加，从而提高了 TN 去除效率。生物放大器的使用有效解决了污水处理中 HN-AD 损失的问题。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biotechnology Letters 工程技术-生物工程与应用微生物

CiteScore

5.90

自引率

3.70%

发文量

108

审稿时长

1.2 months

期刊介绍： Biotechnology Letters is the world’s leading rapid-publication primary journal dedicated to biotechnology as a whole – that is to topics relating to actual or potential applications of biological reactions affected by microbial, plant or animal cells and biocatalysts derived from them. All relevant aspects of molecular biology, genetics and cell biochemistry, of process and reactor design, of pre- and post-treatment steps, and of manufacturing or service operations are therefore included. Contributions from industrial and academic laboratories are equally welcome. We also welcome contributions covering biotechnological aspects of regenerative medicine and biomaterials and also cancer biotechnology. Criteria for the acceptance of papers relate to our aim of publishing useful and informative results that will be of value to other workers in related fields. The emphasis is very much on novelty and immediacy in order to justify rapid publication of authors’ results. It should be noted, however, that we do not normally publish papers (but this is not absolute) that deal with unidentified consortia of microorganisms (e.g. as in activated sludge) as these results may not be easily reproducible in other laboratories. Papers describing the isolation and identification of microorganisms are not regarded as appropriate but such information can be appended as supporting information to a paper. Papers dealing with simple process development are usually considered to lack sufficient novelty or interest to warrant publication.