Using waste to treat waste: Coupling of advanced reduction processes and anaerobic fermentation

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-03-18 DOI:10.1016/j.jwpe.2025.107526

Xing-Yuan Chen , Yun Niu , Lin Pan , Han-Lin Gu , Wei Gao , Zi-Yi Mu , Li-Li Hu , Wei Zhang

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Abstract

Hydrated electrons, generated from indole acetic acid (IAA) under ultraviolet (UV) light irradiation for pollutants removal, represented a feasible in situ IAA utilization technology, addressing the issue of inefficient conversion in legume wastewater anaerobic fermentation (AF). In this study, methylene blue (MB) and rhodamine B (RhB) were used as pollutant models in the reductive degradation system. The degradation rate of MB and RhB was increased for 2.05 and 16.93 folds with the IAA concentration increased by 6 folds. Electron paramagnetic resonance and quenching experiments revealed that hydrated electrons were the dominant species in the system. HPLC-MS analysis revealed that hydrated electrons interact with MB and RhB through demethylation/deethylation and deamination. LC₅₀ of Daphnia magna of intermediates were higher than RhB (5.97 mg/L). Ames mutagenicity of intermediates were lower than MB (0.43) and RhB (0.52). The acidic conditions favored MB and RhB reductive degradation. Additionally, HCO₃⁻, Cl⁻, extracellular polymeric substances, proteins, and polysaccharides inhibited the degradation system by interacting with hydrated electrons. The findings revealed that the coupling of advanced reduction processes and AF was effective for wastewater treatment. This study provided a new solution for preventing IAA conversion and a new opportunity for wastewater treatment through “using waste to treat waste”.

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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