ABSTRAKKelompok tani jamur Sedyo Lestari merupakan salah satu kelompok tani di Desa Argosari, Kecamatan Sedayu, Kabupaten Bantul. Tingginya permintaan jamur menjadi peluang usaha yang baik bagi kelompok tani Sedyo Lestari. Akan tetapi, proses pembuatan baglog membutuhkan banyak energi berupa kayu bakar, terutama yang digunakan untuk sterilisasi media. Di sisi lain, proses pembudidayaan jamur menghasilkan limbah media baglog berupa serbuk kayu yang dapat digunakan sebagai bahan bakar dalam proses sterilisasi tersebut. Selama ini anggota kelompok tani Sedyo Lestari belum mengetahui metode pemanfaatan limbah media baglog sebagai bahan bakar. Oleh karena itu, perlu dilakukan transfer teknologi mengenai proses pembuatan briket.Metode yang digunakan pada kegiatan pengabdian ini adalah sosialisasi, pelatihan, dan pen dam pingan yang diawali dengan pengenalan briket dan teknologi pembuatannya. Tahap selanjut nya adalah pembuatan mesin pencetak briket yang diikuti dengan pelatihan pembuatan briket. Pen dam pingan dan sosialisasi juga dilakukan kepada seluruh anggota kelompok tani.Luaran dari kegiatan ini adalah mesin pencetak briket yang dapat digunakan oleh seluruh anggota kelompok serta pengetahuan mengenai proses pembuatan briket. Dampak penerapan penggunaan briket media limbah budi daya jamur sebagai bahan bakar pengganti kayu bakar adalah penghematan bagi pengeluaran petani untuk membeli kayu bakar serta penanganan permasalahan limbah bagi petani.
Bioethanol is considered as the most promising prospective renewable energy source. One of the most potential lignocellulose material for bioethanol feedstock is spent media (SM) of edible mushroom. Pleurotus ostreatus is more selective to degrade lignin than holocellulose component, therefore the SM is very compatible as a bioethanol feedstock. This study was observed the influence of variation of cultivation time of oyster mushroom (P.ostreatus) into the SM chemical content and its ethanol production yield by using simultaneous saccharification and fermentation method. The results showed that the difference of cultivation time did not show the significant result on SM chemical content, except the hot water soluble extractive content. The highest hot water soluble extractive content was found in SM with 110 days of cultivation time (27.68%). The highest hydrolysis rate was found at 90 days of cultivation time (15.65%) and 48 and 72 hours saccharification time (14.77% and 14.78%). The highest reducing sugar content was found at 110 days of cultivation time (4.89 g/L). The highest ethanol content was found in SM with a combination of 90 days cultivation time and 48 hours saccharification time (1.696 g/L). The 90 days cultivation time was enough to produce SM that can be used as raw material for bio-ethanol production.
In Indonesia, Casuarina montana usually planted as a road shading tree or in the home garden. This tree will be pruned periodically to reduce the amount of the canopy and maintain the beauty of its shape. Pruning biomass usually consists of the tip of the stem, branches, twigs, and leaves. The biomass has potency for energy or chemicals sources. This study aims to know about energy potential of various types of C. montana biomass and charcoal properties in different carbonization temperature. Six types of biomass from pruning waste of C. montana were used as samples. Branch has high potency as α-cellulose source, while bark including twig bark, branch bark, or stem bark have high potency as lignin source. When it is used as direct fuel (firewood), all biomass of C. montana possess quite high calorific value. When it is converted to be charcoal, temperature of 300°C is good for carbonizing the biomass twig, twig bark, branch bark, and stem bark, while biomass branch and stem need temperature of 400°C.
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