Optimizing moving bed biofilm reactor performance for complex leachate treatment in urbanizing regions

IF 6.7 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-09-11 DOI:10.1016/j.jwpe.2025.108678

Mohammad Reza Samarghandi , Mohammad Taghi Samadi , Ali Dehdar , Solmaz Zabihollahi , Ghasem Azarian , Kamran Tari , Sonia Chavoshi

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Abstract

As urbanization and technological growth accelerate in developing regions, managing mature landfill leachate has become a significant environmental concern due to its complex blend of biodegradable matter, heavy metals. This study investigates a biological treatment approach using a moving bed biofilm reactor (MBBR) seeded with microorganisms derived from landfill soil. At a 30 % carrier filling rate and a 12-h retention time, the system removed 44 % of ammonium and 41.91 % of phosphorus, while chemical oxygen demand (COD) removal averaged below 24.40 %. Improved removal efficiencies 84.14 % for ammonium, 63.17 % for phosphorus, and 78.84 % for COD were observed with increased hydraulic retention time and a 50 % filling ratio. Advanced qPCR analysis identified dominant microbial groups, including Proteobacteria, Bacteroidetes, and Firmicutes, as key drivers of pollutant degradation. The findings highlight the MBBR's robustness and adaptability under variable contamination levels, underscoring its potential as a sustainable treatment strategy for mature leachate in rapidly urbanizing regions.

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移动床生物膜反应器处理城市化地区复杂渗滤液性能优化

随着发展中地区城市化和技术发展的加速，由于成熟的垃圾填埋场渗滤液中含有生物可降解物质和重金属，因此管理渗滤液已成为一个重大的环境问题。本研究探讨了一种利用移动床生物膜反应器（MBBR）的生物处理方法，该反应器中植入了来自垃圾填埋场土壤的微生物。在载体填充率为30%、停留时间为12 h的条件下，铵态氮去除率为44%，磷去除率为41.91%，化学需氧量（COD）去除率平均低于24.40%。当水力停留时间延长，填充率为50%时，铵、磷、COD的去除率分别提高了84.14%、63.17%和78.84%。先进的qPCR分析确定了优势微生物群，包括变形菌门、拟杆菌门和厚壁菌门，是污染物降解的关键驱动因素。研究结果强调了MBBR在不同污染水平下的稳健性和适应性，强调了其作为快速城市化地区成熟渗滤液的可持续处理策略的潜力。

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies