光-芬顿氧化工艺和吸附法在奶制品废水处理中的应用

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2024-10-23 DOI:10.1016/j.jwpe.2024.106365

Layanne Rodrigues da Silva , Thais Jaciane Rodrigues Araujo , Maria Tereza Sarmento da Fonseca , Newton Carlos Santos , Germano Elias Gomes , Josivanda Palmeira Gomes , Gilmar Trindade de Araujo , Ana Paula Trindade Rocha

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引用次数: 0

摘要

牛奶加工及其衍生物产生的废水由于成分复杂，污染严重。传统的处理方法无法使处理后的废水得到再利用，因此需要更有效的工艺，如高级氧化工艺（AOP）。本研究评估了光-芬顿高级氧化工艺（Photo-Fenton AOP）在活性炭（AC）悬浮液中吸附以减少污水有机负荷的效率。对污水的电导率、pH 值、化学需氧量（COD）、总固体和可溶性固体以及油脂进行了表征。污水的初始 COD 为 630 mg.O₂/L，总固体含量为 3703 mg/L。对 AC 进行了中孔、微孔、零电荷 pH 值以及波姆酸性和碱性基团表征。采用中心复合旋转设计（CCRD）确定了不同浓度的 H₂O₂ 和 FeSO₄，以制备 Fenton 溶液和 AOP 处理的反应时间，并将 COD 减排量作为响应变量。在优化条件下（0.829 mL/L 的 H₂O₂，0.625 g/L 的 FeSO₄，60 分钟），光氧芬顿处理的 COD 最大降幅为 79%。光氧化处理后，样品悬浮于交流电中并过滤。动力学和平衡研究表明，每克 AC 可去除 1666.6 mg.O₂/g，证实了其在光-芬顿处理后作为吸附剂的有效性。在光-芬顿/吸附耦合处理过程中，有机物的去除率达到了 99%，表明有机化合物的还原能力强、效率高。这些结果表明，处理后的废水可用于各种工业用途，促进可持续水管理实践。

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Application of Photo-Fenton oxidative process followed by adsorption in dairy effluents treatment

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Application of Photo-Fenton oxidative process followed by adsorption in dairy effluents treatment

Wastewater from milk processing and its derivatives is highly polluting due to its complex composition. Conventional treatments do not allow the treated effluent to be reused, so more effective processes such as advanced oxidation processes (AOPs) are required. This study evaluated the efficiency of the Photo-Fenton AOP followed by adsorption in activated carbon (AC) suspension to reduce the organic load of the effluent. The effluent was characterized for conductivity, pH, chemical oxygen demand (COD), total and soluble solids, and oils and fats. The initial COD of the effluent was 630 mg.O₂/L, and the total solids content was 3703 mg/L. The AC was characterized for mesoporosity, microporosity, zero-charge pH, and Boehm's acidic and basic groups. A central composite rotational design (CCRD) was used to determine different concentrations of H₂O₂ and FeSO₄ to prepare Fenton solutions and the reaction time for the AOP treatment, with COD reduction as the response variable. The Photo-Fenton treatment achieved a maximum COD reduction of 79 % under optimized conditions (0.829 mL/L of H₂O₂, 0.625 g/L of FeSO₄ for 60 min). After photooxidative treatment, the samples were suspended in AC and filtered. Kinetic and equilibrium studies showed that the AC could remove 1666.6 mg.O₂/g per gram of AC, confirming its effectiveness as an adsorbent after the Photo-Fenton process. With the coupled Photo-Fenton/adsorption treatment, the efficiency for organic removal reached 99 %, indicating strong and efficient reduction of organic compounds. These results suggest that the treated effluent could be suitable for reuse in various industrial applications, promoting sustainable water management practices.

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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