Paper ID: 126
STUDY OF CLOSURE ZONE 1 GRIYO MULYO’S LANDFILL IN SIDOARJO REGENCY
Retno Sri Juliea and Ellina Sitepu Pandebesie*
Department of Environmental Engineering, Faculty of Civil, Planning, and Geo-Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia
TPA Griyo Mulyo has an area of 28.62 Ha consisting of two zones of waste. Zone 1 covering an area of 8.49 Ha with full condition and zone 2 covering 5.89 Ha under construction. Zone 1 Griyo Mulyo Landfill was built in 2005. In 2019, a Risk Index assessment was conducted in zone 1 of the Griyo Mulyo Landfill with a result of 614.5 which, based on Minister of Public Works Regulation No. 03 of 2013, the Risk Index in the range 601 – 1000 is included in the very high hazard evaluation. This research method covers technical aspects and financing aspects. The technical aspects consist of calculating the stability of land, reconturing, drainage planning, leachate and gas handling. Funding aspects analyzed are the results of the planning, then the calculation of the financing of closure is carried out with 2 alternative cover layers. The results of this study recommend the contour arrangement with a maximum height of waste is 15 meters by forming terraces at each 5 meters hight. Leachate discharge produced is 0.067 liters / second or 5.8 m3 / day. Cost estimation for waste closure based on technical analysis is Rp. 60,927,648,757 (alternative 1), and Rp. 46,422,790,031 (alternative 2).