Metal Industry Waste Desiccation Behavior with the Addition of Bentonite as a Landfill Liner
B S Ramadan1*, L K Alfanti1, E Sutrisno1, M A Budihardjo1, I W Wardhana1, S Yumaroh1

Department of Environmental Engineering, Faculty of Engineering, Universitas Diponegoro, Semarang, Indonesia 50275, Indonesia

Abstract

The existence of garbage in the environment can cause pollution. Therefore, it is necessary to carry out waste management, one of which is by building a landfill. Landfill liner should have a permeability coefficient <10-6 cm/sec to prevent contamination. Currently, the affordable material used as landfill liner is clay, but it is quite rare. An alternative material we can use is metal industrial waste, which has not utilized. Metal industrial waste has a permeability coefficient, namely 25.34560 x 10-6 cm/s. In order to reduce the permeability coefficient value, metal industrial waste is added with bentonite material, which has low permeability value with variations of 0%, 5%, 10%, 15%, 20%, and 25% addition of bentonite. Digital image processing techniques used to calculate crack intensity factor (CIF) values using the Matlab 2019a software. The results showed that the permeability value that fulfilled was the variation of 20% bentonite addition of 0.8059.10-6 cm/s and 25% of 0.5059.10-6 cm/s. While the CIF results showed that only the variation of 25% bentonite addition were not eligible because they had a crack area >4%. Thus it can be concluded that the best composite is metal industrial waste with 20% bentonite.

Keywords: Dewatered sludge, permeability coefficient, crack intensity factor

Topic: Environmental Science, Technology, and Education