IF 6.3 2区 工程技术 Q1 ENGINEERING, CHEMICAL Journal of water process engineering Pub Date : 2025-03-13 DOI:10.1016/j.jwpe.2025.107401
Zishan Aslam, Pervez Alam, Nasir Ahmed Rather
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摘要

苯酚及其衍生物是一种有毒化学品,广泛应用于塑料、煤焦油树脂、焦化和医药等行业。苯酚被 NPRI 和 USEPA 列为 129 种基本污染物之一,需要进行适当的废水处理,以防止对环境和健康造成危害。本研究调查了移动床生物膜反应器(MBBR)的启动动力学,该反应器设计用于处理以苯酚和葡萄糖为主要底物的合成废水。该反应器的水力停留时间(HRT)为 18 小时,有机负荷率(OLR)为每天 0.0013 千克 COD/L,pH 值为 7-9,进水 COD 恒定为 1000 ± 20 毫克/升。生物质首先适应葡萄糖,然后逐渐适应苯酚,共分五个阶段,历时 7 个月 22 天。利用莫诺模型,确定了全苯酚浓度下的主要生物动力学参数:Ks = 47.62 mg/L,k = 0.0485 mgCOD/mgVss-天,Y = 0.336 mgVss/mgCOD,kd = -0.024 天-1,μmax = 0.016 天-1。最高 COD 去除效率和生物量浓度分别为 92 % 和 7.92 mg/L。反应器在 41 天内达到假稳态。第 5 阶段显示出良好的模型拟合(R2 = 0.88-0.90),证实了该反应器在工业规模酚类废水处理方面的效率。最后阶段莫诺模型的 R2 值分别为 0.88 和 0.90,这表明得出的动力学参数与实验数据十分吻合,有效地描述了微生物的生长和底物利用情况。这也证明了该反应器在工业规模处理酚类废物方面的有效性。
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Startup kinetics of aerobic Moving Bed Biofilm Reactors for phenolic wastewater treatment by mesophilic bacteria
Phenol and its derivatives are toxic chemicals widely used in industries like plastics, coal tar resins, coking, and medicine. Classified as one of 129 essential pollutants by NPRI and USEPA, phenol requires proper wastewater treatment to prevent environmental and health hazards. This research investigates the startup kinetics of a Moving Bed Biofilm Reactor (MBBR) designed for the treatment of synthetic wastewater including phenol and glucose as principal substrates. The reactor operated at an 18-hour hydraulic retention time (HRT), an organic loading rate (OLR) of 0.0013 kg COD/L per day, and a pH of 7–9, with a constant influent COD of 1000 ± 20 mg/L. Biomass was first acclimated to glucose and then gradually to phenol over five phases spanning seven months and 22 days. Using the Monod model, key biokinetic parameters at full phenol concentration were determined: Ks = 47.62 mg/L, k = 0.0485 mgCOD/mgVss·days, Y = 0.336 mgVss/mgCOD, kd = −0.024 days−1, and μmax = 0.016 days−1. The highest COD removal efficiency and biomass concentration were 92 % and 7.92 mg/L, respectively. The reactor reached pseudo-steady state in 41 days. Phase 5 showed a good model fit (R2 = 0.88–0.90), confirming the reactor's efficiency for industrial-scale phenolic wastewater treatment. The significant R2 values of 0.88 and 0.90 for the Monod model in final stage indicate that the kinetic parameters derived are well aligned with the experimental data, effectively depicting microbial growth and substrate utilisation. It also demonstrates the reactor's effectiveness for the industrial-scale treatment of phenolic waste.
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来源期刊
Journal of water process engineering
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
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