RINA ANGGRAINI PURBA, 1114071046 (2015) PENGARUH LAMA PERENDAMAN JERAMI DALAM LARUTAN SODA API DAN PENAMBAHAN RAGI (Saccharomyces cerevisiae) TERHADAP PRODUKSI BIOGAS. FP, UNIVERSITAS LAMPUNG.
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Abstrak (Berisi Bastraknya saja, Judul dan Nama Tidak Boleh di Masukan)
Biogas merupakan sumber energi yang berasal dari bahan organik seperti kotoran hewan dan limbah pertanian. Pembentukan biogas terdiri atas tiga tahapan, yaitu tahap hidrolisis, asidogenesis, dan metanogenesis. Penelitian ini bertujuan untuk mengetahui pengaruh lama perendaman jerami menggunakan larutan soda api (NaOH) dan penambahan ragi (Saccharomyces cerevisiae) terhadap produksi biogas sistem batch. Penelitian dilakukan menggunakan digester batch volume 3 L dengan substrat berupa campuran kotoran sapi dan jerami padi dengan perbandingan berat basah 3: 1 (kotoran sapi: jerami). Penelitian dilaksanakan menggunakan Rancangan Acak Lengkap Faktorial dengan dua faktor. Faktor pertama adalah lama perendaman jerami dalam larutan soda api 1% yang terdiri dari 3 level, yaitu 0 (tanpa perendaman), 1 hari (24 jam), dan 2 hari (48 jam). Faktor kedua adalah dosis penambahan ragi yang terdiri dari 3 level, yaitu 0, 0,5, dan 1 gram. Semua perlakuan diulang sebanyak tiga kali. Pengamatan meliputi karakteristik substrat (kadar air, total solid, volatile solid, abu, dan C/N ratio), kondisi proses (pH dan suhu), serta produksi dan produktivitas biogas. Hasil menunjukkan bahwa lama perendaman berpengaruh nyata terhadap produksi biogas hingga hari ke-30 pada taraf α = 5%. Hasil analisis sidik ragam menunjukkan bahwa faktor lama perendaman jerami berpengaruh nyata terhadap produksi biogas, sedangkan penambahan ragi pada dosis hingga 1 gram tidak berpengaruh terhadap produksi biogas. Hasil analisis juga menunjukkan bahwa tidak ada interaksi nyata antara faktor lama perendaman jerami menggunakan larutan soda api 1% dan penambahan ragi. Produksi biogas menggunakan campuran kotoran sapi dan jerami tanpa perendamann menunjukkan produksi biogas kumulatif tertinggi (6.593 ml selama 30 hari). Biogas yang dihasilkan dari semua perlakuan memberikan nyala api berwarna biru pada saat dibakar yang mengindikasikan kandungan gas metana cukup tinggi. Kata kunci: Biogas, kotoran sapi, jerami, soda api, ragi, perendaman EFFECT OF RICE STRAW SOAKING USING CAUSTIC SODA SOLUTION AND YEAST ADDITION (Saccharomyces cerevisiae) ON BIOGAS PRODUCTION Biogas is a source of energy derived from organic materials such as manure and agricultural waste. The formation of biogas consists of three stages, namely hydrolysis, acidogenesis, and methanogenesis. This experiment aimed to study the effect of rice straw soaking within caustic soda (NaOH) solution and the addition of yeast (Saccharomyces cerevisiae) on biogas production using batch mode. Experiment was conducted using 3-L batch digester using substrate composed of a mixture of cow manure and rice straw with a wet weight ratio of 3: 1 (cow manure: rice straw). The experiment was conducted using completely randomized factorial design of two factors. The first factor is soaking time of rice straw in 1% caustic soda solution which was composed of three levels, namely 0 (without pretreatment), 1 day (24 hours), and 2 days (48 hours). The second factor was yeast dose with three levels, namely 0, 0.5, and 1 gram. All treatment was replicated 3 times. Characteristics of the substrate (water content, total solid, volatile solid, ash, and C/N ratio), and digester performance (pH and temperature), production and productivity biogas was measured. Results show that biogas production until day 30th was significantly affected by soaking time at α = 5%. Yeast addition until 1 gram, however, did not influence the biogas production. The analysis also showed that there is no significant interaction between the soaking time and yeast dose on the biogas production. The biogas production using a mixture of cow dung and rice straw without soaking gave the highest cummulative biogas production (6,593 ml for 30 days). Biogas produced from all treatments provide a blue flame when burned which indicates high methane gas content. Keywords: Biogas, cow dung, rice straw, caustic soda, yeast, soaking
| Jenis Karya Akhir: | Skripsi |
|---|---|
| Subyek: | > Budidaya . Perikanan . Angling > Teknologi (General) > Teknologi (General) Teknologi (General) |
| Program Studi: | Fakultas Pertanian dan Pascasarjana > Prodi Teknik Pertanian |
| Pengguna Deposit: | 4964924 . Digilib |
| Date Deposited: | 19 Dec 2015 03:28 |
| Terakhir diubah: | 19 Dec 2015 03:28 |
| URI: | http://digilib.unila.ac.id/id/eprint/15943 |
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