制革厂废水处理及其对环境的影响:对当前做法和新兴技术的审查

IF 2.4 4区 环境科学与生态学 Q2 WATER RESOURCES Water Quality Research Journal Pub Date : 2023-05-09 DOI:10.2166/wqrj.2023.002
A. Bhardwaj, Sanjeev Kumar, Davinder Singh
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引用次数: 1

摘要

制革业在经济中发挥着重要作用,但由于其高用水量和化学品,导致产生高浓度污染物的废水,因此对环境构成了严重威胁。这些废水包含了整个皮革制造过程中产生的一系列污染物,这使得废水处理成为该行业面临的重大挑战。制革过程对废水中的pH、生物需氧量(BOD)、总悬浮固体(TSS)、化学需氧量(COD)、总溶解固体(TDS)以及T Cr、Cr(III)、Cr(VI)、Cl−、硫酸盐、硫化物和无机成分的浓度也有显著影响。本文简要介绍了制革后废水的来源和特点、不同的处理技术以及处理后废水的应用。与制革废水的主要处理技术相比,吸附法和高级氧化法在生物处理前有效地提高了废水的可生化性。AOPs、酶促、吸附和混凝处理有效地将污水提升到所需的处理水平。此外,在处理后的污水打算重复使用的情况下,膜分离工艺显示出了很高的针对性,而混合技术可以获得更好且具有成本效益的结果。
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Tannery effluent treatment and its environmental impact: a review of current practices and emerging technologies
The tannery industry plays a significant role in the economy but poses a severe environmental threat due to its high water and chemical usage, leading to wastewater generation with a high concentration of pollutants. This wastewater contains a range of contaminants created throughout the leather manufacturing process, making effluent disposal a significant challenge for the industry. The tanning process also contributes significantly to the pH, biological oxygen demand (BOD), total suspended solids (TSS), chemical oxygen demand (COD), total dissolved solids (TDS), and concentrations of T Cr, Cr(III), Cr(VI), Cl−, sulfate, sulfide, and inorganic constituents in the wastewater. This review paper provides a concise overview of the origins and characteristics of post-tanning effluent, different treatment techniques, and applications of treated wastewater. Comparing the prominent tannery effluent technologies, adsorption and advanced oxidation processes (AOPs) effectively improved wastewater biodegradability before biological treatment. AOPs, enzymatic, adsorption, and coagulation treatment effectively upgraded the effluent to desired levels for disposal. Additionally, membrane separation processes have shown high pertinency in cases where the treated effluent is intended for reuse, whereas hybrid technologies can be the answer for better and cost-effective results.
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CiteScore
4.50
自引率
8.70%
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0
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