Pupuk kompos (compost fertilizer)

Composting process degrades organic waste by means of microbes in humid and medium temperature either aerobic or anaerobically. The important steps include to prepare raw materials, sufficiently water addition, aeration adjustment and composting activator involvement. Composting activator examples ActiComp, BioPos, EM4, Green Phoskko Organic Decomposer, OrgaDec, Promoting Microbes, SuperDec, Superfarm or employing earthworm. 

Fig. Compost fertilizer

(Courtesy of Hendraagronom, 2012)

Compost raw material contains carbon and nitrogen in the from of manure, solid waste, wastewater, municiple waste or garbage. In composting process the ratio between carbon to nitrogen is approached by additional manure with high content of nitrogen. The optimum content of nitrogen compound preferably 2.5 to 5% compared to carbon compound.


Composting steps consist of activation step and maturity step within temperature between 30 to 70^oC. During process the mixture is turn up and down weekly. Practically it requires two weeks until two months period for compost to mature depends on treatment during process. The maturity of compost product indicated by black-brownist colour.