Chemical Quality of Compost Based on Dairy Cow Feces with the Addition of Spent Bleaching Earth, Charcoal Husk, and Mushroom Bag Log Waste Simon Rodo Siahaan and Ita Wahju Nursita
Animal Science Faculty, Universitas Brawijaya, Indonesia
nursita[at]ub.ac.id
Abstract
This research aims to determine the chemical quality of compost made from dairy cow feces, spent bleaching earth (SBE), husk charcoal, and mushroom bag log waste. There was an addition of decomposers, namely the MA-11 bio activator for all treatments. The method used in this research
was an experiment using 4 treatments and 5 composite repetitions. The basic composition for all treatment was 1500 g of dairy cow feces + 600 g of spent bleaching earth + 60 g of husk charcoal. The addition of mushroom bag log waste in each treatment is P0=0 g, P1=100 g, P2=200, P3=300 g, P4=400 g. The variables studied were the percentage of compost nitrogen, phosphorus, potassium and the C/N ratio. The data obtained were analyzed descriptively. The results showed that all variables met Indonesian National Standard (SNI) 19-7030-2004 except for C/N ratio but it is true when referring to the Agricultural Minister Regulation 261-2019. The conclusion of this study is that mixing dairy cow feces, SBE, rice husk charcoal with the addition of mushroom bag log waste effectively increases the C/N ratio of the compost. The suggestion for this research is that further research needs to be conducted on variations in the composition of composting materials to obtain the best quality compost and meet both two standards
