Effect of Adding Local Microorganisms in Pineapple Skin (Ananas comosus l. merr) on NPK Levels in The Manufacture of Liquid Compost Based on Tofu Waste

Abstrak

Tofu industry liquid waste can be used as a base ingredient in making liquid compost. Liquid compost is made from liquid organic materials/waste by adding a compost activator. One effective activator is local microorganisms (MOL) derived from the fermentation of easily found materials, which decompose organic compounds and can substitute for the EM-4 decomposer. This research aims to determine the effect of adding pineapple peel MOL on the N, P, and K levels of liquid compost based on tofu waste. This experimental research used a Pretest-Posttest with Control Group design. The population and sample were liquid waste from the Dinanti Banjarbaru Tofu Factory. Data analysis utilized the Kruskal-Wallis’s test and simple regression test. Results showed that adding pineapple peel MOL increased N, P, and K levels in liquid compost made from tofu waste. The optimal dose for adding pineapple peel MOL has not been established, but a 200 ml dose showed a statistically significant difference. Pineapple peel MOL can be used as a decomposer to create liquid compost from tofu waste as a substitute for EM-4. However, additional organic materials are needed to enhance the N, P, and K nutrients to meet quality standards. Future research should explore combining starter/decomposer compositions with organic materials to achieve optimal liquid organic fertilizer quality according to compost quality standards.