Abstract:
The escalating areas of palm oil plantation in Riau Province in 2005 due to the
demand for crude palm oil that will also producer wastes. Its solid waste (empty
bunch),its liquid waste from waste water treatment and EM can be useful as organic
fertilizer by composting them for a period about 45 days. To evaluate the quality of
compost such a calsium, magnesium, and sulfur are determined after 10, 15, 20, 25, 30,
35,40, and 45 days of incubation.
The result show that there is the increment of Ca and Mg contents but not for S
because sulfur in the form S04'^ could be oxidized to develop SO2 and reduce to H2S.
The highest Ca obtained after 30 days, Mg obtained after 20 days, and S obtained after 10
days incubation period. For Ca is 7,81 % (w/w), Mg is 1,57 % (w/w), and S is 3,68 %
(w/w).
From the resuh, shows that the compost can be used as organic fertilizer for the
need of Ca, Mg, and S for plants and corps in Riau Province areas.
