Assessment of Leachate Quality by Comparing WQI to Saprobic Index in Plankton
By: Wartiniyati, Sutrisno Anggoro, Budi Hendrarto, Henna Rya Sunoko
Key Words: Leachate, Plankton, Tides, Season, Saprobic.
J. Bio. Env. Sci. 8(3), 96-106, March 2016.
Change on landfill function from sanitary landfill to open dumping at District of Mempawah, Western Borneo, Indonesia is deterioration in environmental management. Objective of this research is to assess leachate quality in dry season using a comparison of WQI to SI during tides. Only plankton species survives at specific contamination level in landfill leachate. Utilization of plankton was to evaluate the influence of waste to biotic community through tides that flows to landfill. Concentration exceeds specified limits lead to extinction of native biota. Long dry season indicates a high Pb (0.123 mg/l), Cu (0.065 mg/l), NH3 (349 mg/l), Fe (17.4 mg/l), as well as high BOD5, and COD. However, there was low DO in low tide at 2.71 mg/l. Heavy metal such as Pb detected at 0.00 mg/l within safe limits for environment, except NH3 at 5.20 mg/l and 23.00 mg/l. SI indicated leachate on high tide in level of lightly contaminated (Oligosaprobic), low tide (Oligosaprobic) and (β-Mesosaprobic). WQI of landfill leachate was 0 – 25 in extremely poor category, 25 – 50 in poor category for high tide and 0 – 25 in extremely poor category in low tide. Samples was tested using Gravimetric, Winkler Azide, Closed Refluc, Spectrophotometer. Research result showed that the most source of waste was from domestic. Leachate SI was indicated in extremely poor, which were responded by Skeletonema as a tolerant plankton to organic matter, Nitzchia vermiculariswith groups tendency and Synedra acu. Wastewater Treatment Plant is an alternative to minimize contamination to prevent extinction of plankton.