Tari Kamran, Samarghandi Mohammad Reza, Shokoohi Reza, Asgari Ghorban, Poorasgari Eskandar, Afshar Saeid
Department of Environmental Health Engineering, School of Public Health, North Khorasan University of Medical Sciences, Bojnurd, Iran.
Department of Environmental Health Engineering, Faculty of Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran.
Bioprocess Biosyst Eng. 2025 Apr;48(4):665-678. doi: 10.1007/s00449-025-03135-3. Epub 2025 Feb 16.
The removal of nutrients from wastewater to reduce the toxicity of these compounds to the environment requires more space in wastewater treatment plants to establish anaerobic, anoxic and aerobic treatment stages. To address this limitation, researchers have developed practical, intensive hybrid treatment systems that enhance nutrient removal performance while requiring less space. However, the implementation of hybrid systems within a reactor introduces the interaction between the attached and suspended growth that can influence the microbial community structure and the performance of the system, so it is crucial to understand the composition of the microbial communities involved in hybrid growth to optimize control strategies in these systems. This study investigated the microbial community structure of the integrated moving bed membrane bioreactor (IMBMBR) system and its impact on nutrient removal in municipal wastewater. The findings demonstrated that the effluent quality was improved with the IMBMBR. The efficiency of removing COD, BOD, and in the IMBMBR were 91 ± 4.0%, 95 ± 4.0%, 99 ± 0.2% and 24 ± 3.0%, respectively. The IMBMBR had better nitrite oxidation and complete nitrification by increasing the diversity and abundance of effective bacteria. The abundance of Proteobacteria, Bacteroidetes and Nitrospira was enhanced in IMBMBR. Coexistence of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) in IMBMBR led to increased nutrient removal. The study results suggest that IMBMBR can be an effective process for nutrient removal, achieving quality standards that comply with legal requirements for wastewater in municipal and industries with limited space for establishing treatment facilities. Additionally, this process can be quickly implemented as an upgrade to existing wastewater treatment plants, avoiding the need to develop an entirely new system.
从废水中去除营养物质以降低这些化合物对环境的毒性，需要在污水处理厂中有更多空间来建立厌氧、缺氧和好氧处理阶段。为了解决这一限制，研究人员开发了实用的强化混合处理系统，该系统在提高营养物质去除性能的同时所需空间更少。然而，在一个反应器内实施混合系统会引入附着生长和悬浮生长之间的相互作用，这可能会影响微生物群落结构和系统性能，因此了解参与混合生长的微生物群落组成对于优化这些系统的控制策略至关重要。本研究调查了一体式移动床膜生物反应器（IMBMBR）系统的微生物群落结构及其对城市污水中营养物质去除的影响。研究结果表明，IMBMBR提高了出水水质。IMBMBR中化学需氧量（COD）、生化需氧量（BOD）以及[此处原文缺失部分指标]的去除效率分别为91±4.0%、95±4.0%、99±0.2%和24±3.0%。IMBMBR通过增加有效细菌的多样性和丰度，具有更好的亚硝酸盐氧化和完全硝化能力。变形菌门、拟杆菌门和硝化螺旋菌门在IMBMBR中的丰度增加。IMBMBR中氨氧化细菌（AOB）和亚硝酸盐氧化细菌（NOB）的共存导致营养物质去除增加。研究结果表明，IMBMBR可以是一种有效的营养物质去除工艺，能够达到符合市政和工业中处理设施空间有限的废水法定要求的质量标准。此外，该工艺可以作为对现有污水处理厂的升级快速实施，无需开发全新的系统。
