低COD/TN比下结构床混合折流板反应器（shbhbr）同时去除有机物和氮：操作策略评价

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-05-17 DOI:10.1016/j.jwpe.2025.107933

D.S.G. Lúcio , R. Ribeiro , G. Tommaso

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引用次数: 0

摘要

本研究考察了实验室规模的厌氧（ANE）和氧/缺氧（O/ a）室混合折流板反应器的潜力，该反应器在不同水力停留时间（HRT）和间歇曝气条件下连续进料乳品废水。反应器的特点是O/A区与结构聚氨酯泡沫床。目的是评估在低碳氮比条件下，O/ a室中有机物和氮的同时去除情况。在整个运行期间，shbhbr的COD去除率达到92.3%以上。条件IIIb的碳氮去除率最高，分别达到98.1%±1.0%和78.4%±4.6%。在O/A室中，C/N比为0.2±0.01，稳态条件下氮去除率为80.9%±1.7%。有效的固体管理是维持反应器性能的关键。IIIa条件下的生物质积累堵塞了曝气系统，降低了除氮效率。在IIIb条件下，污泥处理恢复了系统的稳定性，强调了其在维持氮去除效率方面的作用。这些结果表明，在低COD/NT条件下，shbhbr间歇曝气可以有效地同时去除碳质和氮化合物，通过优化曝气周期降低运营成本，通过结构化聚氨酯床提高生物质保存率，并适应乳制品废水中典型的有机负荷波动。此外，它代表了一种具有成本效益的乳品废水脱氮的有前途的替代方案，最大限度地减少了外部加碳和防止碱化的需要。

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Simultaneous removal of organic matter and nitrogen in a structured-bed hybrid baffled reactor (SBHBR) under low COD/TN ratio: Evaluation of operational strategies

This study investigated the potential of a laboratory-scale hybrid baffled reactor with anaerobic (ANE) and oxic/anoxic (O/A) chambers, operated with continuous feeding of dairy wastewater at different hydraulic retention times (HRT) and intermittent aeration. The reactor featured an O/A zone with a structured polyurethane foam bed. The aim was to evaluate the simultaneous removal of organic matter and nitrogen under a low C/N ratio in the O/A chambers. The SBHBR achieved COD removal above 92.3 % throughout the operation period. Condition IIIb yielded the highest carbon and nitrogen removal efficiencies, reaching 98.1 % ± 1.0 % and 78.4 % ± 4.6 %, respectively. In the O/A chambers, a C/N ratio of 0.2 ± 0.01 was observed, and nitrogen removal reached 80.9 % ± 1.7 % at steady-state conditions. Effective solids management was crucial for maintaining reactor performance. Biomass accumulation in Conditions IIIa clogged the aeration system, reducing nitrogen removal efficiency. Sludge disposal restored system stability in Condition IIIb, underscoring its role in sustaining nitrogen removal efficiency. These results demonstrate that intermittent aeration under a low COD/NT in the SBHBR enables efficient simultaneous removal of carbonaceous and nitrogenous compounds, reduces operational costs by optimizing aeration cycles, enhances biomass retention due to the structured polyurethane bed, and adapts to organic load fluctuations typical of dairy effluents. Moreover, it represents a promising alternative for cost-effective nitrogen removal from dairy wastewater, minimizing the need for external carbon addition and preventing alkalinization.

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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