INVESTIGATION OF ENHANCED ELECTROCOAGULATION-MEMBRANE PROCESS FOR WATER RECLAMATION FROM PALM OIL MILL EFFLUENTS

IF 0.6 Q3 ENGINEERING, MULTIDISCIPLINARY

IIUM Engineering Journal Pub Date : 2024-01-01 DOI:10.31436/iiumej.v25i1.2629

Amina Tahreen, M. Jami, Fathilah Ali, NIK RASHIDA NIK ABDUL GHANI, R. Nedjai

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引用次数: 0

Abstract

The process of electrocoagulation (EC) enhanced with adsorbent addition, as a pre-treatment for ultrafiltration membrane, is widely unexplored in oil palm-based wastewater treatment. Utilizing predetermined EC operational parameters and a defined activated carbon (AC) dosage for biotreated palm oil mill effluents (BPOME), membrane fouling was studied during crossflow membrane filtration at 0.5 bar transmembrane pressure and 1 kDa membrane pore size. The dominant fouling mechanism in membrane filtration without EC-AC pretreatment of BPOME, was cake formation, which was determined through Hermia’s pore blocking models. However, after EC-AC pre-treatment, the membrane fouling was mitigated. Moreover, the pre-treatment process, AC assisted EC, sustainably enhanced the final treated effluent quality in addition to enhancing fouling mitigation in the subsequent membrane filtration. The removal of Total Suspended Solids (TSS), turbidity and color were nearly 100% and Chemical Oxygen Demand (COD) was 99.7% removed with final value of 5±1 mg/L, which is within the range of reusable water standards. ABSTRAK: Proses elektrokoagulasi (EC) yang ditingkatkan dengan bahan penyerap, adalah pra-rawatan bagi membran penuras ultra. Walau bagaimanapun ianya masih belum luas diterokai dalam sistem rawatan air buangan berasaskan kelapa sawit. Mengguna pakai parameter operasi EC pra-tentu dan dos karbon aktif tentu (AC) bagi bio-rawatan efluen kilang kelapa sawit yang terawat (BPOME), mendakan membran telah dikaji menggunakan teknik penurasan membran aliran silang pada tekanan transmembran 0.5 bar dan saiz liang membran 1 kDa. Mekanisme mendakan membran kotoran dominan dalam penurasan membran tanpa pra-rawatan EC-AC BPOME, adalah pembentukan kek, iaitu terhasil melalui model penyumbatan liang Hermia. Walau bagaimanapun, selepas pra-rawatan EC-AC, mendakan kotoran membran dapat dikurangkan. Tambahan, proses pra-rawatan AC-EC, secara mampan dapat menambah kualiti akhir efluen terawat selain dapat meningkatkan mitigasi kotoran mendakan dalam penurasan membran seterusnya. Penyingkiran Total Pepejal Terampai (TSS) adalah 99.7%, kekeruhan dan warna adalah hampir 100%. Keperluan Oksigen Kimia (COD) tersingkir sebanyak 99.7% dengan nilai akhir sebanyak 5±1 mg/L, iaitu dalam julat piawaian air boleh guna semula.

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加强电凝-膜法工艺用于棕榈油厂污水再生利用的研究

作为超滤膜的一种预处理方法，通过添加吸附剂加强电凝聚（EC）过程在以油棕为基础的废水处理中尚未得到广泛探索。在 0.5 巴跨膜压力和 1 kDa 膜孔径条件下，利用预先确定的电解运行参数和生物处理棕榈油厂废水（BPOME）的活性炭（AC）用量，对横流膜过滤过程中的膜污垢进行了研究。在未进行 EC-AC 预处理的 BPOME 膜过滤过程中，主要的污垢机理是滤饼的形成，这是由 Hermia 的孔阻塞模型确定的。然而，经过 EC-AC 预处理后，膜堵塞现象得到缓解。此外，在预处理过程中，AC 辅助 EC 可持续地提高最终处理出水的水质，并在随后的膜过滤过程中减少污垢。总悬浮固体（TSS）、浊度和色度的去除率接近 100%，化学需氧量（COD）的去除率为 99.7%，最终值为 5±1 mg/L，在可重复使用水标准范围内。摘要使用吸附剂强化电凝（EC）工艺是超滤膜的一种预处理方法。然而，它在以棕榈油为基础的污水处理系统中仍未得到广泛应用。在对棕榈油精炼厂废水（BPOME）进行生物处理时，使用预先指定的导电率和预先指定的活性碳（AC）剂量的操作参数，在跨膜压力为 0.5 巴、膜钻孔尺寸为 1 kDa 的条件下，使用错流膜修补技术对膜修补进行了研究。在没有经过 EC-AC BPOME 预处理的膜放气过程中，主要的污物膜放气机制是滤饼的形成，它是通过赫米亚钻孔堵塞模型产生的。然而，经过 EC-AC 预处理后，膜污垢可以减少。此外，AC-EC 预处理工艺除了能在随后的膜脱水中减少易燃杂质外，还能大大提高处理后污水的最终质量。总悬浮固体（TSS）的去除率为 99.7%，浊度和色度的去除率几乎达到 100%。化学需氧量（COD）的去除率高达 99.7%，最终值为 5±1 mg/L，在水可重复使用的范围内。

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来源期刊

IIUM Engineering Journal ENGINEERING, MULTIDISCIPLINARY-

CiteScore

2.10

自引率

20.00%

发文量

审稿时长

40 weeks

期刊介绍： The IIUM Engineering Journal, published biannually (June and December), is a peer-reviewed open-access journal of the Faculty of Engineering, International Islamic University Malaysia (IIUM). The IIUM Engineering Journal publishes original research findings as regular papers, review papers (by invitation). The Journal provides a platform for Engineers, Researchers, Academicians, and Practitioners who are highly motivated in contributing to the Engineering disciplines, and Applied Sciences. It also welcomes contributions that address solutions to the specific challenges of the developing world, and address science and technology issues from an Islamic and multidisciplinary perspective. Subject areas suitable for publication are as follows: -Chemical and Biotechnology Engineering -Civil and Environmental Engineering -Computer Science and Information Technology -Electrical, Computer, and Communications Engineering -Engineering Mathematics and Applied Science -Materials and Manufacturing Engineering -Mechanical and Aerospace Engineering -Mechatronics and Automation Engineering