Abstract
The accumulation in large volume of solid waste in the area of TPA Mandung is creating a new serious problem since the leachate is extremely increasing. The spill drastically contaminates the groundwater and the surrounding environment because the wastewater treatment plant isn’t working on full capacity. Based on those facts, it is necessary to start researching on how the leachate influences the soil characteristics, and how to get the soil to provide a proper filtration. The samples of soil and the leachate from TPA Mandung have, at first, been collected; soil properties have been physically and mechanically tested, while the leachate characteristics have been determined from the parameters of the contained substances. The leachate filtration was performed simultaneously with a hydraulic conductivity test simply varying its height from 7 cm, 9 cm, and 11 cm. The water drained from the hydraulic conductivity test has been reexamined to determine the changes in the leachate parameters after passing through the soil. The K value (hydraulic conductivity coefficient) in the soil hydraulic conductivity test sampled with height 11 cm, 9 cm, 7 cm, were respectively 0.000050 cm/sec, 0.000062 cm/sec, and 0.000065 cm/sec. The results showed a decrease in the coefficient of hydraulic conductivity along with the addition of leachate and the variation in sample height. The leachate in TPA Mandung before and after filtration had COD, BOD5, TSS, TDS and oil levels that exceeded the permitted threshold according to Regulation of Minister of Environment No. 5 of2014 concerning Wastewater Quality Standard.
Highlights
The accumulation of solid waste in the TPA Mandung with large volumes creates a new problem which is called leachate
The present study investigated the general characteristics, leachate and effect of soils in TPA Mandung Tabanan
Based on the USCS, AASHTO and Atteberg classification system the soil in TPA Mandung Tabanan is categorized into the clay
Summary
The accumulation of solid waste in the TPA Mandung with large volumes creates a new problem which is called leachate. According to Government Regulation of the Republic Indonesia No 82 year 2001 about Water Quality Management and Water Pollution Control, the leachate treatment business must use wastewater management installation or Instalasi Pengelolaan Air Limbah or IPAL. On September 1st, 2016, Sumur Pantau II produced wastewater with 221 mg/L of COD and 109 mg/L of BOD5 The rate of both COD and BOD5 have exceeded the quality standard based on the Ministry of Environment Regulation No 5 year 2014 about the Standard of Wastewater Quality. This exessive value of COD and BOD5 is very harmful to the environment
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