EFFECT OF LEACHATE MICROORGANISMS FROM BIOCONVERSION ORGANIC WASTE BY Hermetia illucens LARVAE ON CHILI (Capsicum sp.) GROWTH IN URBAN ROOFTOP FARMING SYSTEMS

• Main Author: Mawawi, Hidayat
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/42903
• Institution: Institut Teknologi Bandung

Black Soldier Fly Larvae (Hermetia illucens) is known as organism can convert organic waste and bioconversion process would generate liquid (leachate) and solid (compost) residue. Leachate that be produced by black soldier fly (BSF) contain nutrients and potential microbes to support plant growth, and determine optimal leachate concentration for plant. Liquid fertilizer was applied to chili plant after moving to soil medium and compost ex BSF with 1%, 2% and leachate 3% concentration in 2 times/ week. The liquid fertilizer effect to growth and productivity of cabai which compared with control group (without nutrition) as negative control and NASA® as positive control. Observations consisted of plant height, number of plant branches, wet weight, fruit dimensions and vitamin C content. Microorganisms leachate and compost contain were analyzed in Axil Scientific Pte Ltd. The leachate result was showed dominant bacterial was Pseudomonas sp. (41% of bacterial population) as fixing nitrogen, dominant fungal was Aspergillus sp. (24% of fungal population) as entomopathogen, dissolving phosphate and generate indole acetyl acetate (IAA) compound. The compost result was showed dominant bacterial was Pirellulaceae (26% of bacterial population) as ammonia oxidizer, dominant fungal was Aspergilus candidus (36% of fungal population) as dissolving phosphate. Leachate 1% treatment were showed number of branches 15.95 ± 5.21, plant height 23.41 ± 8.22 cm, wet weight 1401.43 gram, fruit dimension 0.65-1.39 cm, and vitamin C content 48.73 – 62.62 mg/100 gram. Although leachate concentration increasing was directly proportional with number of microorganism in leachate, it has no real influence on chili growth and productivity as indicated by statistical analysis which did not show significant differences between treatment groups. Based on value of wet weight and vitamin C contain on chilies, its were concluded that leachate 1% can be apllied as liquid organic fertilizer for chili cultivation such as NASA®.