The Influence Of Cementation Solution On The Permeability Of Waste Sludge Stabilized With Bacteria As A Temporary Landfill Cover
Andi Marini Indriani, Maslina, Gunaedy Utomo, and Alfian Rahmadi

Department of Civil Engineering, Universitas Balikpapan, Indonesia

Abstract

Piles of rubbish can produce liquid waste called leachate. Leachate from landfills can have negative impacts on the environment and humans. To minimize the impact of leachate on the surrounding environment, the waste is covered with material that can isolate it from the surrounding environment. PDAM sludge waste is a by-product of drinking water system processing that originates from surface water. Therefore, this research was carried out in order to determine the effect of cementation solution on the permeability coefficient value of Temporary Landfill Cover using PDAM waste sludge material. This research uses PDAM sludge material reinforced with MICP (Microbially Induced Calcite Precipitation). The research results revealed that the sample permeability met the criteria for temporary landfill cover, namely between 10-4 to 10-5 cm/s. Where the highest permeability was found in the 0,75M sample with a 7 day period, namely 4.07x10-4 cm/s and the lowest permeability obtained was 6.67x10-5 cm/s with a cementation solution concentration of 0,25M during the dormant period for 28 days. The test results show that strengthening soil stability by adding cementation solution using the MICP method can reduce permeability values, thereby reducing the possibility of environmental damage by leachate water.

Keywords: MICP, Bacillus Subtilis, Sludge

Topic: Waste Management and Recycling