Abstract:
Sago (sago Metroxylon Rottb.) can be used for food, housing and industrial raw
materials. A byproduct of the use of starch in the form of solid waste, which is
already used in a simple to feed livestock and composting. Traditionally, sago waste
composting takes a long time about 3 months with varying quality. Research on
optimum composting time necessary for effective use of raw materials
Microorganism 4 (EM-4) as a starter. In this research, the composition of the raw
material consists of sago pulp, chicken manure and sawdust in the ratio (1:2:1)
fermented with EM-4 on time variations 0, 5, 10, 15, 20 and control of well water at 0
and of 20 days. Analysis of the quality parameters of fermented compost consists of
the availability of nutrients N, P, K, organic C and C/N ratio. They are compost
quality parameters. The method used is the determination of N-nitric acid with phenol
disulfonic acid pickling, P by using Olsen, K using flame photometry, C-organic by
using Willey Black, N-total with kedjhal and C/N ratio by mathematical methods.
The results showed that the optimum level for N, P, K, organic C and C/N ratio of
composting make different on composting day. From fermentation with optimum
level of EM-4 N-nitrate, C-organic and C/N ratio was obtained as the day 5 which are
0.1496%, 3.0229%, and 10.9854. The optimum levels for N-total, P and K are in day
10 which are 0.2768%, 0.1590% and 0.98%. Well water as control has increased all
parameters at the day 20. The changes which occur is due to the lack of activity of
microorganism that works on the composting. Composting sago pulp, chicken
manure and sawdust fermented with EM-4 delivers quality compost in the range of 5-
10 days. Composting can be used as organic fertilizer because it is in the range of C/
N ratio of humus (10-20)
