_{Novel of Liquid Organic Fertilizer from Degraded Batik Dye and Tofu Effluents On Hydroponic Systems}

The batik and tofu industry is growing rapidly in Indonesia. However, the problem of effluents generated in the process of making batik and tofu has not been carried out maximumly. Batik dye effluents such as Indigeosol Blue and tofu effluents contain high BOD, COD, and TSS and can pollute the environment if not handled properly. Aspergillus sp. is a microscopic fungus that is able to properly degrade batik dye effluents. The innovation of making liquid organic fertilizer from degraded batik dye and tofu effluents can be a sustainable solution in overcoming environmental problems and advancing the agricultural sector, especially in the aspect of organic fertilizer for agricultural crop productivity. Micro and macro elements in tofu waste and degraded batik dye effluents have the potential to support organic fertilizer elements. The method of making liquid organic fertilizer from the degraded batik dye and tofu effluents starts from the stage of rejuvenation and proliferation of Aspergillus sp. fungi, degradation process of batik dye waste, fertilizer content analysis test, and fertilizer test on mung bean plants by hydroponic systems. The results showed that the addition of liquid organic fertilizer from degraded batik dye and tofu effluents on mung bean plants affected the best growth response (e.g. plant weight, number of leaves and plant height) than given water, batik dye effluents, and tofu effluents.