<p><em>Ampas tebu sebagian besar mengandung bahan-bahan lignoselulosa.yang dapat berfungsi sebagai adsorben. Minyak jelantah (waste cooking oil) adalah minyak bekas pemakaian kebutuhan rumah tangga umumnya, bila ditinjau dari komposisi kimianya, minyak jelantah mengandung senyawa-senyawa yang bersifat karsinogenik, tapi bila dimurnikan dengan cara meyerap kotoran yang ada, masih bias bernilai Ampas tebu adsorben dapat menurunkan FFA oleh 82,14%. Berdasarkan sampel 150 ml digunakan memasak sampel minyak, waktu efektif untuk pengobatan untuk mengurangi FFA adalah 60 menit, Tujuan penelitian ini adalah untuk mengetahui efektivitas ampas tebu sebagai adsorben untuk pemurnian minyak jelantah. Penelitian ini merupakan Jenis penelitian ini adalah Exsperimen, dengan rancangan One Group Pretest Posttest. Populasi dalam penelitian ini adalah Minyak Jelantah hasil dari penggorengan sanjai di Kota Bukittinggi tahun 2018. Sampel diambil menggunakan metode Purposive Sampling. Hasil penelitian menunjukkan sesudah dilakukan penyaringan sampel minyak jelantah menggunakan ampas tebu sebanyak tiga kali pengulangan didapatkan hasil yaitu : bau normal, rasa hambar, warna kuning muda, dan endapan tidak ada, sehingga sesuai dengan standar baku mutu minyak goreng yang baik, adanya perbedaan rerata kadar asam lemak bebas, bilangan peroksida, kadar air sebelum dan sesudah adalah asam lemak (0,233), peroksida (1,366), air (0,533). Hasil uji statistik didapatkan p value asam lemak (0,020), peroksida (0,002), air (0,026). Kesimpulan dari penelitian ini minyak yang telah di proses sesuai dengan standar baku mutu minyak goreng yang baik. (SNI 01-3741-2002 tentang Standar Mutu Minyak Goreng).</em></p><p><em><br /></em></p><p><em><em>Sugarcane (Saccharum officinarum) is used as the main raw material in the sugar industry. Bagasse is the solid waste from the industrial processing of sugar cane into sugar. Bagasse fiber is not soluble in water and is mostly composed of cellulose, hemicellulose and lignin. Cooking oil (waste cooking oil) is a former oil consumption household goods generally, but when viewed from the chemical composition, used cooking oils contain compounds that are carcinogenic. Bagasse adsorbent can reduce FFA by 82.14%. Based on a 150 ml sample used cooking oil samples, the effective time for treatment to reduce FFA is 60 minutes,The purpose of this study was to determine the effectiveness of bagasse as an adsorbent for pemnurnian used cooking oil. This research is a type of research is Exsperimen, with one group pretest posttest design. The population in this study is the result of frying Used Cooking Oil Sanjai Bukittinggi 2018. The results showed After filtering waste cooking oil samples using bagasse as much as three times the repetition of the results obtained are: normal smell, taste bland, pale yellow color, and precipitation does not exist, so in accordance with bakum good quality cooking oil, theirmean differencefree fatty acid content, peroxide value, moisture content before and after is 0.233, 1.366, 0.533. Statistical test results obtained p value of 0.020, 0.002, 0.026. The conclusion of this study after three repetitions the results obtained are: normal smell, taste bland, pale yellow color, and precipitation does not exist, and its happening significant reduction of which the decrease in free fatty acid, peroxide, water content.</em></em></p>
One method to overcome the scarcity of alternative sources of energy on earth is through the development of photovoltaic cells. This method used a solar energy to electrical energy transformation. In this research, breaking (splitting) of water molecules into H 2 and O 2 gas by the photovoltaic process uses electrodes CuO/C with Na 2 SO 4 electrolyte. In this process used 2 photovoltaic cells as electricity producing and U-shaped electrolysis cell for solver (splitting) of water molecule produce H 2 and O 2 gas. CuO electrode (anode) is made through the burning of copper rod in a furnace at temperature 400 o C with a variety of combustion 1, 3, 4 times each lasting for 1 hs, while the cathode in the form of carbon rods obtained from 2B pencil. The optimum conditions for Na 2 SO 4 electrolyte concentration is 0.8 N and for CuO electrodes with 3x burning. Optimum efficiency photovoltaic process was 2.66%. H 2 and O 2 gas volume obtained near stoichiometric ratio is 2 : 1.
Bioetanol merupakan salah satu bahan bakar alternatif yang diproduksi melalui proses fermentasi dengan bantuan mikroorganisme. Produksi bioetanol dunia meningkat seiring dengan gejolak harga minyak. Minat untuk memproduksi etanol melalui fermentasi bahan baku yang murah, seperti lignoselulosa dari limbah pertanian, kehutanan, dan tanaman yang mempunyai kandungan biomassa tinggi makin meningkat. Produksi bioetanol dilakukan melalui tiga tahapan proses yaitu hidrolisis, fermentasi dan destilasi. Pada proses fermentasi, dilakukan dengan bantuan mikrob. Penelitian ini bertujuan untuk memproduksi bioetanol dari limbah tandan kosong kelapa sawit dengan bantuan bakteri yang diisolasi dari tanah gambut Cagar Biosfer Giam Siak Kecil Bukit Batu Riau. Dari hasil penelitian diperoleh kadar bioetanol didapatkan sebesar 0,642% pada fermentasi selama 4 hari dan 5,61% pada fermentasi selama 6 hari.
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