White mushroom is one of popular food commodity in East Java. Every year total production of white mushroom is more than 4800 ton. The cultivation of this mushroom needed the medium known as "baglog". Every 3 month the medium should be changed. The huge amount of solid waste will be produced around 40 tons/month and must be managed by farmer. Based on the composition of waste contains 80% of sawdust and 10% of rice brain. This composition known has a high concentration of carbon and potential as a material to produce of energy. This research investigated the effectiveness of "baglog" from medium of white mushroom cultivation as a briquette for energy alternative. Different variables used in this experiment are drying process and material that used as an adhesive for making of the briquette. The quality of the briquette such as energy value, compressive strength of briquette, moisture, fi xed carbon and emission of briquette, was analyzed, based on Indonesia Standard. Result of the experiment showed that energy value of the briquette is 3400 cal/gram with drying process using oven. The compressive strength result showed that the adhesive using starch glue is very effective. This briquette is environmentally friendly because the gas emission is less that Indonesian Standard for emission of bio-coal based on PERMEN ESDM no 47 Tahun 2006.
Salah satu solusi alternatif untuk memenuhi kebutuhan bahan bakar adalah dengan memproduksi bioetanol dari konsumsi tanaman seperti jagung dan singkong. Produksi bioetanol dari tanaman tidak efektif karena memerlukan lahan besar untuk memasok kebutuhan bioetanol negara. Penelitian ini membahas penggunaan Spirogyra untuk produksi bioetanol melalui proses fermentasi dengan penambahan enzim α-amilase dalam konsentrasi yang berbeda dari 0, 0.03, 0.06, dan 0.09 g dalam 50 mL. Pengukuran kadar etanol dilakukan melalui proses destilasi. Data yang diperoleh dari proses destilasi dianalisis dengan analysis of variance (ANOVA) untuk mengetahui pengaruh perbedaan penambahan jumlah enzim α-amilase terhadap kadar etanol yang dihasilkan. Hasil penelitian ini menunjukkan bahwa penambahan enzim α-amilase berpengaruh terhadap jumlah etanol yang dihasilkan dari fermentasi ekstrak Spirogyra. Perlakuan dengan penambahan enzim α-amilase sebanyak nol menghasilkan etanol dalam jumlah yang tidak signifikan. Sedangkan, perlakuan penambahan enzim α-amilase 0,06 g/50 mL dalam waktu fermentasi 10 hari menghasilkan konsentrasi etanol tertinggi sebesar 9,245%.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.