Utilization of Kitchen Waste as Liquid Organic Fertilizer (POC) in Floating Hydroponic Systems in Anizel Crusaster (Lactuca sativa L Batvia Lettuce)

Abstract

Organic waste from households can have added value if it is used as solid and liquid organic fertilizer for plant nutrition in hydroponic systems. The high price of AB Mix fertilizer increases production costs, so innovation is needed as an alternative to nutrients for hydroponic plants. Liquid Organic Fertilizer (POC) is one of the alternatives offered to solve this problem. This study aims to determine the content contained in POC kitchen waste and determine the growth of lettuce plants on hydroponic floating rafts with the application of kitchen waste as POC. This research method uses experimental methods. With nutrient parameters NPK, BOD, COD, pH, temperature, concentration of solution and plant response. The results showed that the NPK content of solid kitchen waste was 0.02% N content, 0.06% P content, 0.07% K content, while the BOD content was 1,476.00 mg/L, and 4,800.00 mg/L COD. After being given liquid organic fertilizer with several concentrations of 50%, 60%, 70%, the 50% concentration treatment gave the best effect on the parameters of plant height, number of leaves, leaf width, and wet weight on lettuce plants with a height of 8.2 cm, width 4.5 cm, 8 leaves and a wet weight of up to 13.79 g.