Scholarlink

<p>Industrial soap wastewater, with its high pollutant load, poses serious environmental risks, highlighting the need for sustainable treatment methods. Thus, this study investigates a combined Coagulation/Flocculation (CF) and membrane filtration method to address the complexities of soap wastewater treatment. Using Response Surface Methodology (RSM), seven key parameters including coagulant and flocculant concentrations, initial pH, mixing speed, and contact time were optimized for coagulation and flocculation steps. CF achieved notable results, completely removing turbidity (100% removal) and reducing Chemical Oxygen Demand (COD) by 52% under optimal conditions, i.e., an initial pH of 9.32, alum coagulant concentration of 17.14&#xa0;g L<sup>−1</sup>, and flocculant dosage of 182.08&#xa0;mg L<sup>−1</sup>. Effective coagulation required a mixing speed of 155.18&#xa0;rpm during 4.98&#xa0;min, while flocculation benefited from a slower speed of 32.58&#xa0;rpm over 34.66&#xa0;min. To enhance overall treatment efficiency, microfiltration (MF) and ultrafiltration (UF) membranes were subsequently evaluated. The hybrid CF/UF process based on a 5&#xa0;kDa Molecular Weight Cut Off (MWCO) membrane is the most efficient, achieving a considerable COD removal of 81% accompanied by a salinity reduction of 42%. Germination tests indicate that despite the notable improvement in soap wastewater quality via the innovative CF-UF hybrid approach, the treated water remains unsuitable for irrigation due to persistent phytotoxicity; however, this process offers a promising solution for industrial water recycling, promoting sustainable water management in a circular economy context.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Performance of a Hybrid Process of Coagulation/Flocculation and Membrane Filtration for Highly Polluted Soap Industry Wastewater Treatment for Industrial Purposes

  • 期刊论文

  • 发表日期：

    2025年5月7日

查看全文
  • Ghofrane Louhichi,
  • Linda Jammeli,
  • Ahmed Ghrabi,
  • Imen Khouni

摘要

Industrial soap wastewater, with its high pollutant load, poses serious environmental risks, highlighting the need for sustainable treatment methods. Thus, this study investigates a combined Coagulation/Flocculation (CF) and membrane filtration method to address the complexities of soap wastewater treatment. Using Response Surface Methodology (RSM), seven key parameters including coagulant and flocculant concentrations, initial pH, mixing speed, and contact time were optimized for coagulation and flocculation steps. CF achieved notable results, completely removing turbidity (100% removal) and reducing Chemical Oxygen Demand (COD) by 52% under optimal conditions, i.e., an initial pH of 9.32, alum coagulant concentration of 17.14 g L−1, and flocculant dosage of 182.08 mg L−1. Effective coagulation required a mixing speed of 155.18 rpm during 4.98 min, while flocculation benefited from a slower speed of 32.58 rpm over 34.66 min. To enhance overall treatment efficiency, microfiltration (MF) and ultrafiltration (UF) membranes were subsequently evaluated. The hybrid CF/UF process based on a 5 kDa Molecular Weight Cut Off (MWCO) membrane is the most efficient, achieving a considerable COD removal of 81% accompanied by a salinity reduction of 42%. Germination tests indicate that despite the notable improvement in soap wastewater quality via the innovative CF-UF hybrid approach, the treated water remains unsuitable for irrigation due to persistent phytotoxicity; however, this process offers a promising solution for industrial water recycling, promoting sustainable water management in a circular economy context.

Graphical Abstract