Research article
Vol 13 No 1 (2019): Volume 13, Number 1, 2019
Pengaruh komposisi subtrat dari campuran kotoran sapi dan rumput gajah (Pennisetum purpureum) terhadap produktivitas biogas pada digester semi kontinu
Jurusan Teknik Pertanian, Fakultas Pertanian, Universitas Lampung Jl Soemantri Brojonegoro No. 1 Kampus Gedong Meneng, 35145 Bandar Lampung
Jurusan Teknik Pertanian, Fakultas Pertanian, Universitas Lampung Jl Soemantri Brojonegoro No. 1 Kampus Gedong Meneng, 35145 Bandar Lampung
Jurusan Teknik Pertanian, Fakultas Pertanian, Universitas Lampung Jl Soemantri Brojonegoro No. 1 Kampus Gedong Meneng, 35145 Bandar Lampung
Abstract
This study aims to determine the effect of substrate composition on biogas production from a mixture of cow dung and elephant grass using semi-continuous digester. Fresh cow dung and elephant grass were obtained from Department of Animal Husbandry, Faculty of Agriculture, University of Lampung. Elephant grass was knife-chopped, crushed using a blender and then mixed with cow dung at a total solid (TS) ratio between elephant grass and cow dung varies from 35:65 (P1), 40:60 (P2), 45:55 (P3), and 50:50 (P4). This mixture was then diluted with tap water until its TS content reach 5% and was used as substrate. Four semi-continuous digesters (labeled as P1 to P4) having a capacity of 36 L and working volume of 28 L were initially loaded with 22 L of diluted fresh cow dung (dilution ratio of 1:1) as a starter (source of bacteria) and were left until stable condition. When the biogas was produced, the prepared substrate was added daily into the respective digester at a loading rate of 500 mL.d-1. Parameters to be observed included daily temperature and pH of the substrate, daily biogas production, TS and VS content, and biogas quality. The results showed that the digester worked at average pH of 6.9 and the daily temperature 26.3 to 29.7°C. The total biogas production for 60 days was 608.4, 676.8, 600.0, and 613.3 L, respectively for P1, P2, P3, and P4. Biogas yield after the substrate achieving the designed composition was 254 (P1), 260 (P2), 261 (P3), and 271 L.m-3 of the substrate (P4). The addition of elephant grass up to 50% could maintain high production of biogas.
References
- Afta, T., Iqbal, J., Iqbal, K., Aslam, S., and Ahmad, R., 2014, Production of biogas from an agro-industrial waste and its characteristics, J. Sci. Res., 6 (2), 347-357
- Deublein, D., and Steinhauser, A., 2008, Biogas from Waste and Renewable Resource, WileyVCH Verlag GmbH &Co. KgaA, Weinheim
- Fachry, H. A. R., Rinenda, dan Gustiawan, 2004, Penentuan nilai kalorifik yang dihasilkan dari proses pembentukan biogas, Jurnal Teknik Kimia, 2 (5), 7-12
- Haryanto, A., Hasanudin, U., Afrian, C., and Zulkarnaen, I., 2018a, Biogas production from anaerobic codigestion of cowdung and elephant grass (Pennisetum purpureum) using batch digester, IOP Conf. Series: Earth and Environmental Science, 141, 012011
- Haryanto, A., Sugara, B. P., Telaumbanua, M., and Rosadi, R. A. B., 2018b, Anaerobic codigestion of cow dung and rice straw to produce biogas using semi-continuous flow digester: Effect of urea addition, IOP Conf. Series: Earth and Environmental Science, 147, 012032
- Haryanto, A., Candra, P. A., Suharyatun, S., Rahmawati, W., Hasanudin, U., and Triyono, S., 2017a, Effect of loading rate and urea addition on biogas yield using semicontinuous flow anaerobic codigestion of cowdung and elephant grass (Penisetum purpuerum), International Conference on Food Security Innovation (ICFSI), Banten, October 18-20, 2017
- Haryanto, A., Cahyani, D., Triyono, S., Murdapa, F., and Haryono, D., 2017b, Economic benefit and greenhouse gas emission reduction potential of a family-scale cowdung anaerobic biogas digester, Int. Journal of Renewable Energy Development, 6 (1), 29-36
- Herawati, D. A., dan Wibawa, A. A., 2010, Pengaruh pretreatment jerami padi pada produksi biogas dari jerami padi dan sampah sayur sawi hijau secara batch, Jurnal Rekayasa Proses, 4 (1), 25-29
- Ihsan, A., Bahri, S., dan Musafira, 2013, Produksi biogas menggunakan cairan isi rumen sapi dengan limbah cair tempe, Natural Science: Journal of Science and Technology, 2 (2), 27-35
- Junaidi, A, 2018, Pengaruh Frekuensi Pengumpanan Terhadap Produksi dan Kualitas Biogas dari Campuran Kotoran Sapid dan Rumput Gajah (Pennisetum purpureum) pada Digester Semi Kontinyu (Skripsi), Jurusan Teknik Pertanian, Fakultas Pertanian, Universitas Lampung, Bandar Lampung
- Kaparaju, P., 2007, Effect of temperature and active biogas process on passive separation of digested manure, Bioresour. Technol., 99 (5), 1345-1352
- Marchaim, U., 1992, Biogas Processes for Sustainable Development, FAO, Rome.
- MEMR (Ministry of Energy and Mineral Resources), 2008, Handbook of Energy & Economic Statistics of Indonesia
- MEMR (Ministry of Energy and Mineral Resources), 2017, Handbook of Energy & Economic Statistics of Indonesia 2017
- Pandey, P. K., Ndegwa, P. M., Soupir, M. L., Alldredge, J. R., and Pitts, M.J., 2013, Efficacies of inocula on the startup of anaerobic reactors treating dairy manure under stirred and unstirred conditions, Biomass and Bioenergy, 35, 2705–2720
- Rekha, B. N., and Aniruddha, B. P., 2013, Performance enhancement of batch anaerobic digestion of napier grass by alkali pretreatment, International Journal of ChemTech Research, 5 (2), 558-564
- Rukmana, H.R., 2005, Budidaya Rumput Unggul, Kanisius, Yogyakarta
- Sawasdee, S., and Nipon, P., 2014, Feasibility of biogas production from napier grass, Energy Procedia, 61, 1229 – 1233
- Simamora, S., Salundik, Wahyuni, S., dan Surajudin, 2006, Membuat Biogas Pengganti Minyak dan Gas Dari Kotoran Ternak, Agromedia Pustaka, Jakarta
- Tangkas, G. P., dan Trihadiningrum, Y., 2016, Kajian pengelolaan limbah padat peternakan sapi Simantri berbasis 2R (reduce dan recycle) di Kecamatan Seririt, Kabupaten Buleleng, Jurnal Teknik ITS, 5 (2), D86-D91
- Uwar, N. A., Wardana, I. N. G, dan Widhiyanuriawan, D., 2012, Karakteristik pembakaran CH4 dengan penambahan CO2 pada model Helle-Shaw Cell pada penyalaan bawah, Jurnal Rekayasa Mesin, 3 (1), 249-257
- Widarti, B. N., Syamsiah, S., dan Mulyono, P., 2012, Degradasi substrat volatile solid pada produksi biogas dari limbah pembuatan tahu dan kotoran sapi, Jurnal Rekayasa Proses, 6 (1), 14-19
- Yadvika, S., Sreekrishnan, T. R., Kohli, S., and Rana, V., 2004, Enhancement of biogas production from solid substrates using different techniques – A review, Bioresour. Technol., 95 (1), 1-10.