Research article
Vol 11 No 1 (2017): Volume 11, Number 1, 2017
Pengaruh penambahan EM-4 dan molasses terhadap proses composting campuran daun angsana (Pterocarpus indicun) dan akasia (Acasia auriculiformis)
Prodi Teknik Kimia, Fakultas Teknik, Universitas Sebelas Maret Jl. Ir. Sutami No. 36A Surakarta 57126, Indonesia.
Prodi Teknik Kimia, Fakultas Teknik, Universitas Sebelas Maret Jl. Ir. Sutami No. 36A Surakarta 57126, Indonesia
Prodi Teknik Kimia, Fakultas Teknik, Universitas Sebelas Maret Jl. Ir. Sutami No. 36A Surakarta 57126, Indonesia.
Abstract
Dried leaves in the Universitas Sebelas Maret (UNS) area, which consist of angsana (Pterocarpus indicus) and acacia (Acacia auriculiformis) are potential to be utilized as organic fertilizers. The objective of this research was to study the influence the addition of inoculation with Effective Microorganism-4 (EM-4) and molasses in composting process of angsana and acacia leaves. As much as 3 kilograms of acacia and angsana leaves crushed till 1 cm size was incorporated into fermentor tank. Into the reactor, EM-4 and molases were then added and the fermentor was sealed. This mixture was incubated for 4 weeks, and every 4 days it was homogenized by flipping the fermentor tank. Sampling was carried out every 7 days for total organic C and total N content measurements and C/N ratio calculation. The volume ratio of EM-4 inoculation and molasses addition was varied i.e. 3:3, 9:3, 3:9, and 9:9. The fastest maturity of organic fertilizer during the composting process was achieved by EM-4: molasses ratio of 3:9 which only needed 21 days composting time. All other ratios have reached maturity on the 28th day of composting process. The variation of EM-4 has an effect on the time of organic fertilizer maturity product, while the variation of molasses has no effect on the process.
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