Domestic Wastewater Treatment through the Application of Corchuros olitorius L. as Bio-Coagulant in Cagayan de Oro City, Philippines


  • Gina C. Lacang

    Department of Environmental Science and Technology, College of Science and Mathematics, University of Science and Technology of Southern Philippines, Cagayan de Oro, 9000, Philippines

  • Corazon V. Ligaray

    Department of Chemical Engineering and Technology, College of Engineering and Technology, Mindanao State University-Iligan Institute of Technology, Iligan, 9200, Philippines

Received: 24 March 2023 | Revised: 18 April 2023 | Accepted: 20 April 2023 | Published Online: 27 April 2023


This research paper presented the potential of Corchuros olitorius L. as a natural coagulant in the removal of turbidity, total suspended solids, and biochemical oxygen demand from the domestic wastewater of the University of Science and Technology of Southern Philippines. Optimization of the natural coagulant and synthetic coagulant was employed prior to the treatment design. The jar test method was used in the optimization and lab analysis including the gravimetric method, dilution technique, and digital measurements. The optimization results of Corchuros olitorius L. using the jar test method revealed better removal at a lower dosage of 50 mg/L and a higher settling time of 90 minutes. The characterization using FTIR analysis also suggests a functional group that influences coagulation activity. Using the optimum dose and optimum settling time, results with the different treatment designs showed the highest removal at pH 7 showed % BOD removal of 89.78% (A75C25); 85.98% (A25C75); 88.76% (A50C50). TSS removal measured values of 88.50% (A75C25), 85.56% (A25C75), and 87.16% (A50C50), while turbidity removal of 83.47% (A75C25), 80.27% (A25C75), and 80.27% (A50C50). Statistically, measured values differ between treatment designs. It is suggested to investigate removal efficiency in more varied pH conditions, different settling times, stirring speed, and other variables for future studies.


Corchorus olitorius L., Jar test, Optimization, Removal efficiency, Wastewater


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How to Cite

Lacang, G. C., & Ligaray, C. V. (2023). Domestic Wastewater Treatment through the Application of Corchuros olitorius L. as Bio-Coagulant in Cagayan de Oro City, Philippines. Journal of Environmental & Earth Sciences, 5(1), 108–120.


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