Effect of different biodecomposers on composting of coffee pulp waste

Abstract

Coffee pulp waste is a plantation commodity waste that has the potential to be used as organic fertilizer; however, it requires a long time to decompose. Therefore, the use of biodecomposers can accelerate the weathering process in the fermentation process of coffee pulp waste. This study aims to evaluate the effect of different biodecomposers and to determine the most effective type for decomposing coffee pulp waste and improving its nutrient content. This study was conducted at the Experimental Garden, Department of Agricultural Production Technology, Pangkep State of Polytechnic Agriculture. A completely randomized exprimental design was applied with four treatments (Po: Control, P1: Coffee pulp waste + Aspergillus sp; P2: Coffee pulp waste + Trichoderma sp; P3: Coffee pulp waste + Penicillium sp), each replicated three times. The Data were analyzed using analysis of variance (ANOVA), followed by the LSD test. The results showed that the highest increase in the number of biodecomposer conidia was observed in Penicillium sp. (7.56 × 108). The availability of C, N, P, and K in coffee grounds waste also increased with the addition of biodecomposers compared to the control. The highest C content was 24.15% (Trichoderma sp.), the highest N was 1.27% (Penicillium sp.), the highest P was 3.51% (Trichoderma sp.), and the highest K was 2.07% (Trichoderma sp.), while the lowest C/N ratio was 13 (Penicillium sp.).