Pupuk Organik dari Limbah Pabrik Gula Madukismo dengan Starter Mikrobia Pengurai Untuk Menambah Kandungan N, P, K

Abstract

Filter cake (blotong) is a dark-colored sludge resulting from sugar mill waste, it often dumped, causing pollution and odor. Filter cake is produced from about 3.8% of sugar cane that is milled by a sugar factory. Vinasse is waste water generated from alcohol making process. In the process of making one liter of alcohol, it will produce 13 liters of vinasse. Vinasse contains many K elements while filter cake contains a lot of N, P and Ca elements. This allows for composting filter cake with the addition of vinasse to produce organic fertilizer. Filter cake and vinasse can be found in Madukismo sugar factory (PG Madukismo). Organic fertilizer through composing the mixture of filter cake and vinasse using microbial starter EM-4 and X-Compost can be done easily at home environment. In order to determine the optimum process conditions to produce organic fertilizer, the ratio of filter cake and vinasse composition need to be varied. Composting reaction experiment was carried out for thirty days with observation in its temperature and pH. Next, analysis on N, P, K, and C/N ratio was conducted. Based on the results obtained, the use of starter microbes X-compost is more prospective than using starter microbes EM-4. The compost produced by the starter microbes X-compost contains higher N, P, K than the compost produced by the starter microbes EM-4. Adding more vinasse will give optimum results if the addition of vinasse is 25% of the weight of filter cake.