Development of organic and inorganic waste utilization in Cibodas Village as the upstream part of Citarum River to prevent flood

Abstract

Cikapundung River is one of the resources of Bandung’s water supply. Unfortunately, at the present time Cikapundung is heavily polluted by domestic waste, industrial waste and agricultural waste. In the upstream of Cikapundung, 30% of its population live from livestock as dairy farmers. Dairy farmers tend to dispose their livestock wastes to the river instead of utilized it for biogas and compost, albeit it plays role in ensuring the sustainability in dairy farming and farmers’ economic improvement. Therefore, in order to solve this problem, Chemical Engineering UNPAR and Student Association of Chemical Engineering UNPAR (HMPSTK) with the help of The Lodge Foundation constructed biodigester to convert livestock manures to biogas as part of community service project. The community service consisted of six parts: a) Problem identification; b) Location survey and advocacy; c) Sample collection; d) Research; e) Construction of biogas digester; f) Socialization to local community. Biogas digester with 5,000 L manures/day is constructed in Cibodas Village, Maribaya, Lembang with the help from PRIMARY. Livestock manures with ratio 3:1 to organic waste are proven to produce the largest gas production. Gas produced can be utilized as an alternative energy source to dairy farmers for lantern lighting and cooking, Manures residue can be utilized as fertilizer, consequently reducing waste to Cikapundung and improve water quality in the long term.