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Eco-Friendly Coagulant versus Industrially Used Coagulants: Identification of Their Coagulation Performance, Mechanism and Optimization in Water Treatment Process

Author

Listed:
  • Nadiah Khairul Zaman

    (Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia)

  • Rosiah Rohani

    (Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia
    Research Centre for Sustainable Process Technology, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia)

  • Izzati Izni Yusoff

    (Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia)

  • Muhammad Azraei Kamsol

    (Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia)

  • Siti Aishah Basiron

    (Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia
    Makmal Pusat, Syarikat Air Melaka Berhad, Jalan Padang Keladi, Durian Tunggal, Melaka 76100, Malaysia)

  • Aina Izzati Abd. Rashid

    (Department of Civil Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Malaysia)

Abstract

The evaluation of complex organic and inorganic coagulant’s performances and their relationships could compromise the surface water treatment process time and its efficiency. In this work, process optimization was investigated by comparing an eco-friendly chitosan with the industrially used coagulants namely aluminum sulfate (alum), polyaluminum chloride (PAC), and aluminum chlorohydrate (ACH) in compliance with national drinking water standards. To treat various water samples from different treatment plants with turbidity and pH ranges from 20–826.3 NTU and 5.21–6.80, respectively, 5–20 mg/L coagulant dosages were varied in the presence of aluminum, ferum, and manganese. Among all, 10 mg/L of the respective ACH and chitosan demonstrated 97% and 99% turbidity removal in addition to the removal of the metals that complies with the referred standard. However, chitosan owes fewer sensitive responses (turbidity and residual metal) with the change in its input factors (dosage and pH), especially in acidic conditions. This finding suggested its beneficial role to be used under the non-critical dosage monitoring. Meanwhile, ACH was found to perform better than chitosan only at pH > 7.4 with half dosage required. In summary, chitosan and ACH could perform equally at a different set of optimum conditions. This optimization study offers precise selections of coagulants for a practical water treatment operation.

Suggested Citation

  • Nadiah Khairul Zaman & Rosiah Rohani & Izzati Izni Yusoff & Muhammad Azraei Kamsol & Siti Aishah Basiron & Aina Izzati Abd. Rashid, 2021. "Eco-Friendly Coagulant versus Industrially Used Coagulants: Identification of Their Coagulation Performance, Mechanism and Optimization in Water Treatment Process," IJERPH, MDPI, vol. 18(17), pages 1-21, August.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:17:p:9164-:d:625971
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    References listed on IDEAS

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    1. Setyo Budi Kurniawan & Siti Rozaimah Sheikh Abdullah & Muhammad Fauzul Imron & Nor Sakinah Mohd Said & Nur 'Izzati Ismail & Hassimi Abu Hasan & Ahmad Razi Othman & Ipung Fitri Purwanti, 2020. "Challenges and Opportunities of Biocoagulant/Bioflocculant Application for Drinking Water and Wastewater Treatment and Its Potential for Sludge Recovery," IJERPH, MDPI, vol. 17(24), pages 1-33, December.
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    Cited by:

    1. Dae Wook Kim & Sung Il Yu & Kyuyong Im & Juhee Shin & Seung Gu Shin, 2022. "Responses of Coagulant Type, Dosage and Process Conditions to Phosphate Removal Efficiency from Anaerobic Sludge," IJERPH, MDPI, vol. 19(3), pages 1-9, February.
    2. Alicja Knap-Bałdyga & Monika Żubrowska-Sudoł, 2023. "Natural Organic Matter Removal in Surface Water Treatment via Coagulation—Current Issues, Potential Solutions, and New Findings," Sustainability, MDPI, vol. 15(18), pages 1-24, September.

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