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Tropical Leachate Properties as a Growing Media for Algae as a Source of Biodiesel Production

Algae can be found in ponds, rivers, lakes, abandoned ponds and also can grow abundantly in the aged pond of leachate landfill since there is the source of sunlight, CO2 (carbon dioxide) and nutrients. Like plants, algae make their own food by photosynthesis but differ from the plant; algae do not have roots, petals, stems or leaves. Leachate is the water that contains dissolved and suspended solids resulting from the percolation of water that drains through the waste in the landfill. The constituents of the leachate include organic matters and inorganic matters which depend on the age of landfill and type of the waste. The aim of this research study is to identify the characteristics of the leachate from aged landfill that cause the growth of the algae. Metals that act as the nutrients that exist in the leachate were measured using ICP-OES (inductively coupled plasma-optical emission spectroscopy). BOD5 (biochemical oxygen demand that is measured in 5 days) and COD (chemical oxygen demand) were measured using DO (dissolved oxygen) meter and spectrophotometer, respectively. The pH of the leachate was measured using pH meter. The results showed that the highest metal that exists in the leachate was magnesium in quantity of 8.52 ppm. BOD5 and COD of the leachate gave the results of 5.24 mg/L and 99.67 mg/L, respectively. The pH of the leachate is considered as alkaline since the value of the pH is 8.38. This indicates that the characteristics of the leachate for algae growth was aged landfill with the alkaline condition and the nutrient needed by the algae for growing is magnesium.