Abstract
Current practice in Indonesia shows that Household Solid Waste (HSW) is handled by transferring to landfill site. Meanwhile, around 68% of HSW is composed of biodegradable components, which has potential for biogas production. The current study compares some commercial activators including Green Phosko (GP7) and Effective microorganisms 4 (EM4) with homemade activator in 200 L anaerobic digester equipped with manual mixing for processing kitchen waste (KW). pH and ratio of solid waste to water were set at 8 and 1:2, respectively. Batch experiments show that digester #3 with homemade activator shows superior performance compared to commercial activators. Meanwhile, the digesters with commercial activators show better performance compared to digester control (without activator). Digester #3 produces 1.35 L CH4/kg total solid (TS) and 1.14 L CH4/kg volatile solid (VS). Current work suggests that the homemade activator has the most suitable methanogen bacterium compared to the commercial activators.
Highlights
Current practice in Indonesia shows that Household Solid Waste (HSW) is mostly handled by transferring to the landfill site
Around 68% of HSW is composed of biodegradable components known as organic fraction of municipal solid waste (OFMSW)
Anaerobic digestion may be incorporated into existing municipal solid waste management (MSWM) in which OFMSW is readily available in abundance as a useless component in a landfill, with no extra cost for planting, such as energy crops
Summary
Current practice in Indonesia shows that Household Solid Waste (HSW) is mostly handled by transferring to the landfill site. Around 68% of HSW is composed of biodegradable components known as organic fraction of municipal solid waste (OFMSW). It is a crucial biomass feedstock, which is potentially recycled into many valuable products. Acetogen bacterium degrades the simple organic molecules into acetic acid, carbon dioxide and hydrogen [2]. Anaerobic digestion may be incorporated into existing municipal solid waste management (MSWM) in which OFMSW is readily available in abundance as a useless component in a landfill, with no extra cost for planting, such as energy crops. The use of OFMSW for anaerobic digestion process helps reduce the growing environmental problems of current MSWM in Indonesia as well as a dependency on fossil energy. The present study focuses on finding an simple digestion process that can be operated by local communities
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