Blended natural and synthetic coagulants for the COD and BOD removal from surface water; optimization by response surface methodology: The case of Gibe river - Publication - Bridge of Knowledge

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Blended natural and synthetic coagulants for the COD and BOD removal from surface water; optimization by response surface methodology: The case of Gibe river

Abstract

A novel wastewater treatment method is presented in this study. It combines natural coagulants derived from watermelon seeds with the commonly used synthetic coagulant alum. This research demonstrates a remarkable synergy between these two coagulants in removing nutrients from Gibe River wastewater. Combining natural and chemical coagulants often improves water treatment by enhancing particle destabilization, accelerating floc formation, and broadening the range of removable contaminants, resulting in lower chemical dosage requirements. The optimal mixing ratio, found to be 1 part watermelon seed coagulant to 3 parts alum, leads to improved treatment efficiency. At this ratio, the process achieves impressive removal rates: 98.26 % for total dissolved solids (TDS), 96.10 % for biochemical oxygen demand (BOD), and 95.26 % for chemical oxygen demand (COD). These findings not only validate the use of watermelon seeds as a coagulant but also highlight the combined approach’s environmental and economic benefits. This integrated method offers a more sustainable and cost-effective solution for wastewater treatment.

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DOI:
Digital Object Identifier (open in new tab) 10.1016/j.heliyon.2024.e37961
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Creative Commons: CC-BY-NC-ND open in new tab

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Category:
Articles
Type:
artykuły w czasopismach
Published in:
Heliyon no. 10,
ISSN: 2405-8440
Language:
English
Publication year:
2024
Bibliographic description:
Bayu A., Endale Y., Samuel Z. A., Kebede S.: Blended natural and synthetic coagulants for the COD and BOD removal from surface water; optimization by response surface methodology: The case of Gibe river// Heliyon -,iss. 2024 (2024), s.e-37961
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.heliyon.2024.e37961
Sources of funding:
  • ExiST project: Excellence in Science & Technology – Ethiopia (funded by KfW, Ger many), Jimma Institute of Technology (JiT) Center of Excellence- CRGE RESOURCE CART.
Verified by:
Gdańsk University of Technology

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