Year: 2025 | Month: May | Volume: 12 | Issue: 5 | Pages: 595-606
DOI: https://doi.org/10.52403/ijrr.20250562
Evaluating the Effectiveness of Eco Enzyme in Reducing COD, BOD, and TDS of Leachate at Basirih Landfill under Different Contact Time Conditions
Akbar Rahman1, Helna Mas’ada2
1Department of Architecture, Faculty of Engineering, University of Lambung Mangkurat University, Banjarbaru, South Kalimantan, Indonesia
2Founder Zero Waste South Kalimantan, Banjarmasin, South Kalimantan, Indonesia
Corresponding Author: Akbar Rahman
ABSTRACT
Leachate is one of the significant environmental impacts of landfill operations, characterized by high concentrations of both organic and inorganic pollutants. Basirih Landfill, the sole active final disposal site in Banjarmasin City, generates large volumes of leachate that remain inadequately treated according to environmental quality standards. This study aims to evaluate the effectiveness of Eco Enzyme as a natural biological agent in reducing key leachate pollutant parameters—namely Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), and Total Dissolved Solids (TDS)—by considering variations in application method and contact time. A quasi-experimental design was employed, using a before-after with control model. Eco Enzyme was applied through surface spraying onto leachate ponds (with contact durations of 3–10 days) and through direct mixing during sampling. Analytical results indicate that Eco Enzyme did not significantly reduce COD within short contact durations, although it demonstrated potential for rapid reaction when applied directly. BOD levels consistently decreased across all sampling points, approaching or meeting national quality standards. Conversely, TDS tended to increase at points with longer contact times, likely due to the accumulation of dissolved compounds from decomposition processes. Therefore, the effectiveness of Eco Enzyme is highly dependent on contact duration and is recommended to be integrated with additional treatment methods such as aeration or filtration to achieve more optimal leachate management.
Keywords: Eco Enzyme, leachate, Basirih Landfill, biological treatment, appropriate technology
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