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I Nengah Simpen
Program Studi Kimia FMIPA Universitas Udayana, Bukit Jimbaran, Bali
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PRODUKSI BIOENERGI ALTERNATIF DALAM BIODIGESTER MOBILE MELALUI PEMANFAATAN LIMBAH TERNAK SAPI BALI UNTUK MENUNJANG PETERNAKAN BERKELANJUTAN I.A.G. Widihati; IN. Simpen; N.M. Puspa wati
Buletin Udayana Mengabdi Vol 12 No 2 (2013): Volume 12 No.2 – September 2013
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

The Community Service was conducted in Penglipuran village, involving the cattle breeders of Subak Suka MajuSidewahas. The activity was done initially by intoducing device of biodigester mobile for the place of ferment. Andthen, explaining about potency of feces standard upon which biogas, fermentation teory, technique preparationof raw materials including mixing of feses with water in certain comparison, explaining also the system workbiodigester. Activity phase was continued by demonstration at one of breeder cage. Demonstration started fromphase mixing of feces with water at comparison of 2:3, squealer till put into digester and fermented during 10-15 days. On the day of 16th, it was continued by opening faucet of biodigester for the fella of polutan gas, andthen ignition match to have formed of gas (biogas). The conclusion of this activity showed that the participantwere very enthusiastic attending such valuable activity and manage to form biogas. Biogas which already formedis ready to be interfaced to stove which have been modified. The cattle breeders in Subak Suka Maju Sidewahasalso succeeded to follow technique making of biogas starting from preparing the raw material, perception duringfermentation until the day of 15th production. At last biogas start being used on the day of 20th till the 30th.
PELATIHAN TEKNOLOGI FERMENTASI KOMBINASI FESES SAPI DAN BABI DALAM DIGESTER MOBILE SEBAGAI UPAYA PRODUKSI BIOENERGI ALTERNATIF Suryatika Suryatika; R. Dalem; N. Simpen; N. S. Miwada
Buletin Udayana Mengabdi Vol 10 No 1 (2011): Volume 10 No.1 – April 2011
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

Has done community service in order to provide the knowledge and skills to members of a group of cattle in the village of Pengotan, Bangli about how processing cow manure and pig waste into biogas, as an environmentally friendly alternative energy. Method of activities with demoplot how to create installations, mobile digester, which is a fermentation tank where the cow and pig feces to produce biogas (bioenergy) is ready to use. The group of farmers who participated in the training activities of household-scale biogas production is very enthusiastic follow until the end. Almost 100% of participants acknowledged that mobile digester offered as a place of production of biogas can be accepted and become the solution of cultural problems that have been developed in rural areas Pengotan.
PENERAPAN TEKNIK GRAVITASI DALAM PENGAWETAN BAMBU UNTUK MENINGKATKAN KUALITAS BAMBU PASCA PENEBANGAN IN. Simpen; IM. Sutha Negara; I.A.G. Widihati
Buletin Udayana Mengabdi Vol 11 No 1 (2012): Volume 11 No.1 – April 2012
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

The Community Service was held to produce bamboo preserved by borax solution through using gravity technique toward the bamboo crafting raw material in Desa Pengotan, Bangli, therefore people are free from beetle attack. The preserved bamboo will improve quality. The activity was realized by several steps, namely surveys to fix the activity schedule, prepare materials, perform the demonstration plot, apply test, execute, and discuss. From the training in technological application, tuition, and evaluation conducted, the people is very enthusiastic in attending execution of this activity. They considered because the applied technology and yielded product are something new. Besides, the people do not find difficulties in accepting and executing this technology so that they can yield raw material bamboo which have been easily preserved.
PENGUATAN EKSISTENSI SUBAK MELALUI PENDEKATAN IPTEKS DENGAN DILANDASI NILAI-NILAI TRI HITA KARANA (THK) DI DESA MAMBANG, KECAMATAN SELEMADEG TIMUR, KABUPATEN TABANAN N L.N. Kebayantini; IN.S. Miwada; I N. Simpen
Buletin Udayana Mengabdi Vol 15 No 3 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

Tujuan kegiatan adalah untuk mengetahui potensi dan karakteristik subak di desa Mambang serta pelatihanipteks yang mendukung eksistensinya. Sasaran kegiatan yakni anggota subak, kelompok simantri, ibu-ibupetani dan masyarakat lainnya yang ada di desa Mambang. Metode kegiatan dengan pendekatan partisipasiaktif masyarakat dan transfer ipteks. Hasil kegiatan diawali dengan survey potensi subak yang ada di desaMambang. Di desa Mambang terdapat 4 subak (luas total 303,84 ha) yakni subak Babakan Anyar (73,23 ha),Subak Gede Mambang (103,39 ha), Subak Penarukan (80 ha) dan Subak Abian Dukuh Sakti (47,22 ha).Upaya meningkatkan eksistensi keorganikan subak telah dilakukan pelatihan pembuatan biourin, biofestisidadan kompos dan direspon positif oleh para anggota subak (tingkat capaian pengetahuan hingga 85%) sertakegiatan penguatan pakan dengan metode fermentasi. Kegiatan pelatihan kewirusahaan bagi ibu-ibu petani didesa Mambang mendapat respon positif khususnya pada olahan susu kedelai, chicken nugget maupun kripikpisang (rata-rata tingkat capaian pengetahuan hingga 90%). Kesimpulan kegiatan ini telah mampumeningkatkan kesadaran masyarakat dalam pelestarian subak yang dilandasi nilai-nilai Tri Hita Karana(THK).
Modifikasi Limbah Tulang Sapi Bali dan Pemanfaatannya untuk Adsorpsi Methylene Blue (MODIFICATION OF BALI COW BONE WASTE AND ITS APPLICATION TO ADSORPTION OF METHYLENE BLUE) I Nengah Simpen; Ni Gusti Ayu Made Dwi Adhi Suastuti
Jurnal Veteriner Vol 17 No 4 (2016)
Publisher : Faculty of Veterinary Medicine, Udayana University and Published in collaboration with the Indonesia Veterinarian Association

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Abstract

The research of modification, characterization, and application of nano-porous adsorbent base onBali cow bone waste to methylene blue (MB) adsorption has been carried out. The modification was carriedout through extraction of hydroxyapatite (HA) from cow bone, then its activated by 0.4 M NaOH solutionand coating to form active sites of Fe and Fe-Al oxides. The adsorbent was applied to know quantitativelyadsorption capacity coated-HA (CHA) to MB as wastewaters simulation. Compound of CHA wascharacterized amount of active sites by base-acid titration, Bronsted-Lewis acid sites by FTIR spectroscopy,specific surface area by MB method and pore size by surface area analyzer gasorption nitrogen. While,amount of coated-Fe and Al by LIBS. Amount of MB adsorbed was analyzed by UV-Vis spectrophotometer.The results showed that coating of Fe and Fe-Al oxides increased amount of active sites, sites distributionof new Lewis acid site, everage nano pore size with pore volume is microporous (less than 2 nm), and Fe andFe-Al oxides was into HA crystal structure. The amount of active sites was the higest of T1-Fe-Al2O3 andall pores diameter less than 58.182 nm.While, the specific surface area increased T3-Fe2O3>T3-Fe-Al2O3>T2-Fe2O3 respectively. In the adsorption isotherm, coating on HA significantly increased ability of adsorbentand through Freundlich model (R2 > 0.77) with the higest adsorption capacity on T3-Fe2O3 (3.2019 mg/g)then T2-Fe-Al2O3 (2.7921 mg/g). Results of this research indicate that Fe and Fe-Al oxides HA-modifiedincreased adsorption ability.
EFFORTS PERFORMED BY HOTELS IN BALI IN LOOKING AFTER THE ENVIRONMENT A.A.G. Raka Dalem; I.N. Widana; I.N. Simpen; I.N. Artawan
Bumi Lestari Journal of Environment Vol 10 No 1 (2010)
Publisher : Environmental Research Center (PPLH) of Udayana University

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Abstract

A study on “Efforts perpormed by hotels in Bali in looking after the environment” was undertaken in 2009, by utilising data from July, 2008 until June, 2009. Objectives of the study was for collecting data on any efforts undertaken by hotels in looking after the environment especially related to minimising water consumption, garbage handling, the use of chemicals (especially cleaning chemicals), minimising energy consumption and ecosystem conservation (measured from the proportion of natural vegetation). Data were collected from interviews, document checkings and distributing questionaires. Results of the study showed that in average water consumption of hotels in Bali was 115 litres / guest night. It was considered low, less than the benchmark of Green Globe/Earthcheck which was 1,300 litres / guest night. The average of energy consumption was 0.322 MJ per guest night, which was still much below the baseline levels / standard of 340 MJ / guest night. In average garbage/waste produced by hotels was 0.0309 litre/guest night. This was also much below the baseline of 6 litres / guest night. The use of biodegradable cleaning chemicals in the hotel was averaged 35% which should be a minimum of 50%. There were 22% only of hotels which used cleaning chemicals that were biodegradable over 50% (over the standard). In average the proportion of natural vegetation in a hotel was 29%. There were 43% of sampled hotels of which their natural vegetation was over the baseline of 33%. Thus, hotels in Bali should improved their performance in looking after the environment, especially dealing with cleaning chemicals and ecosystem conservation. In this regards, they should increase the proportion of the use of biodegradable cleaning chemicals and increase the proportion of land kept with their natural vegetation.
PENINGKATAN POTENSI CEKER BROILER HASIL SAMPING DARI TEMPAT PEMOTONGAN AYAM (TPA) MENJADI GELATIN DENGAN MENGGUNAKAN METODE EKSTRAKSI TERKOMBINASI I Nyoman Sumerta Miwada; I.N. Simpen
Bumi Lestari Journal of Environment Vol 9 No 1 (2009)
Publisher : Environmental Research Center (PPLH) of Udayana University

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Abstract

This research was proposed to increased the potency of shanks, esspeciality their skin by hidrolising the collagen (by extrating with solvent) into gelatine products. This research was run on a Completely Randomized Design (CRD). The experiment was run in factorial designs of 2 x 3. Factor I was solven type chloroform-ethanol and heksana-etanol, Factor II was a combination of ratio of 1:1, 1:3, and 3:1. The variable in this research were pH, viscosity, rendement, protein, and fat of gelatine contents. Result of the research indicated that the pH value of gelatine was between 8.21-8.52. The solvent of chloroform-ethanol gave the best result (P<0.05) on the ratio of 1:3. Percentage of rendement of gelatine was highest obtained from chloroform-ethanol types compared with that of hexane-ethanol (P<0.05). The interaction combinations of chloroform-ethanol on the ratio of 1:1 would result in the rendement percentage to be higher than others (P<0.05). Otherwise, the solvent of hexane-ethanol might bring impact to the viscocity of gelatine (P<0.05) compared to chloroform-ethanol. The interaction combination of hexane-ethanol ratio gave the best result (P<0.05) with highest level of viscosity on the ratio of 3:1 and lower on 1:3. The content of gelatine protein was highest (P<0.05) for the combination of hexane-ethanol compared to that of chloroform-ethanol. The solvent of chloroform-ethanol types could degrade more component of gelatine fat (P<0.05) compared to that of hexane-ethanol. It could be concluded that the research that the content of gelatine protein from extraction by hexane-ethanol on the combination ratio of 3:1 brought the highest quality compared to others.
BIODEGRADASI ZAT WARNA REMAZOL BLACK B SECARA AEROBIK- ANAEROBIK DALAM SISTEM BIOFILTRASI VERTIKAL DENGAN MENGGUNAKAN TANAMAN TALAS (Colocasia esculenta) Febby Hartesa W; I Wayan Budiarsa Suyasa; I Nengah Simpen
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 11 No 1 (2017)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/EJES.2017.v11.i01.p07

Abstract

PIGMEN BIODEGRADATION OF BLACK B REMAZOL ON AEROBIC- ANAEROBIC IN VERTICAL BIOFILTRATION SYSTEM USING TARO PLANT (Colocasia esculenta)The research was conducted to decrease concentration of remazol black b on vertical biosystem of Colocasia esculenta plant with and without addition of activated suspension as variable. The activated suspension was collected from many sources such as sediment of Badung river, Serangan river, Soputan river and dying waste treatment. The aims of this research are: 1) to determine the best activated suspension from seeding sample from some ecosystems, 2) to determine optimal time of vertical biosystem plant to decrease concentration of remazol black b, 3) to know effectivity and capacity of vertical biosystem plant to decrease concentration of remazol black b, TDS and TSS. The results of research show that best activated suspension was provided from sample Serangan river sediment, optimal time to decrease concentration of remazol black b with and without addition of activated suspension is 60 hours and 96 hours. The effectivity system with addition activated suspension to decrease concentration of remazol black b is 97,82% and capacity is 2,7963 ppm/m3hours. The effectivity system with addition activated suspension to decrease concentration of TDS is 83,93% and capacity is 14,44 ppm/m3hours. The effectivity on system with addition activated suspension to decrease concentration of TSS 89,75% and capacity is 9,1568 ppm/m3. The effectivity on system without addition activated suspension to decrease concentration of remazol black b is 89,35% and capacity is 2,5543 ppm/m3hours. The effectivity on system without addition activated suspension to decrease concentration of TDS is 65,71% and capacity is 11,31 ppm/m3hours. The effectivity on system without addition activated suspension to decrease concentration of TSS is 72,29% and capacity is 7,3746 ppm/m3 hours.
Solid Catalyst in Esterification and Transesterification Reactions for Biodiesel Production: A Review Nengah Simpen; IN. Suprapta Winaya; ID.G. Ary Subagia; IW. Budiarsa Suyasa
International Journal of Engineering and Emerging Technology Vol 5 No 2 (2020): July - December
Publisher : Doctorate Program of Engineering Science, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/IJEET.2020.v05.i02.p29

Abstract

Biodiesel is considered as an important substitute for the replacement of fossil diesel due to its biodegradable, renewable and non-toxicity to environment. Biodiesel consist of mixture of mono alkyl esters of long chain fatty acids. It is produced from vegetable oils, animal fats and waste cooking oil. Solid catalysts are promising and advantageous for biodiesel production because those could be reusable, environmentally benign and are more effective than liquid catalysts. Moreover, the application of solid catalysts does not produce soaps through triglycerides saponification or free fatty acids neutralization. When triglycerides as major component of oil react with alcohol (methanol or ethanol) to form biodiesel in the presence of base catalyst, this called is transesterification. When acid catalysts are used for reducing free fatty acids to form biodiesel, this called is esterification. The application of solid catalysts in esterification and transesterification reactions for biodiesel production are discussed in this review.
KONVERSI ASAM OLEAT MENJADI BIODIESEL MENGGUNAKAN KATALIS HETEROGEN CaO CANGKANG KEPITING TEREMBANKAN ?-Al2O3 Y. N. Handayani; I N. Simpen; I. M. S. Negara
Jurnal Kimia (Journal of Chemistry) Vol. 16, No.2, Juli 2022
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JCHEM.2022.v16.i02.p15

Abstract

Katalis heterogen telah dikembangkan dalam produksi biodiesel. Katalis heterogen CaO dibuat melalui proses kalsinasi dari salah satu sumber CaCO3 yaitu cangkang kepiting. Pembuatan katalis heterogen CaO telah berhasil dilakukan selanjutnya diaktivasi menggunakan larutan KOH dan diembankan ?-Al2O3, secara metode padat-padat. Tujuan penelitian ini adalah mengetahui karakteristik katalis heterogen CaO teraktivasi terembankan ?-Al2O3 (CaO/?-Al2O3) serta mengetahui kinerja katalis tersebut dalam mengkonversi asam oleat menjadi biodiesel. Hasil penelitian menunjukan bahwa katalis dengan karakteristik terbaik ditunjukkan oleh CaO/?-Al2O3 100:7 yang memiliki nilai kebasaan permukaan sebesar 20,9532 mmol g-1 dengan jumlah situs basa 12,6181x1019 atom g-1, dan luas permukaan spesifik sebesar 42,0979 m2/g. Hasil pemanfaatan katalis CaO/?-Al2O3 untuk mengkonversi asam oleat menjadi biodiesel, diperoleh konsentrasi optimum adalah 5%, rasio molar asam oleat/metanol optimum 1:9, dan waktu reaksi optimum 120 menit mampu mengkonversi asam oleat menjadi biodiesel dengan yield 89,80%.Karakteristik biodiesel hasil konversi memenuhi standar yang ditetapkan SNI 7182-2015, yaitu densitas (40oC) 863 kg/m3, viskositas kinematik (40oC) 4,8 cSt, kadar air 0,03%, dan bilangan iod 35,3562 g I2/100g. Kata kunci: asam oleat, biodiesel, CaO/?-Al2O3, katalis heterogen. ABSTRACT Heterogeneous catalysts are commonly used in biodiesel production. The CaO heterogeneous catalyst can be prepared by calcination process from one source of CaCO3 prepared from crab shell. The preparation of heterogeneous catalyst was successfully carried out by activation with KOH and doped with ?-Al2O3. The purpose of this study is to determine the characteristics of the CaO/?-Al2O3heterogeneous catalyst and the performance of the catalyst for converting oleic acid into biodiesel. The results of this study that the best characteristics of catalyst were shown by CaO/?-Al2O3 100:7, which has a surface basicity was 20,9532 mmol g-1 with active sites 12,6181x1019atom g-1, and specific surface area of ??42.0979 m2/g. The results of using CaO /?-Al2O3 catalyst for converting oleic acid into biodiesel with the optimum concentration was 5%, the optimum oil/methanol molar ratio of 1:9, and the optimum reaction time of 120 minutes for converting oleic acid into biodiesel with the yield of 89.80%. The characteristics of the final biodiesel obtained had met the Indonesian National Standard (SNI 7182-2015) with density (at 40oC), kinematic viscosity (at 40oC), water content, iodine value were 863 kg/m3; 4.8 cSt; 0.039%, and 35.3562 g I2/100g, respectively. Keywords: CaO/?-Al2O3, oleic acid,biodiesel, heterogeneous catalyst.
Co-Authors A A I Rahma Prabawanti A.A. B. Putra Anak Agung Gde Raka Dalem Anastasia Victor, Agnes Maria Salvi Arsa Arsa D. A. D. N. Dewi D.M Priyantha Wedagama Dewik Setiyawati Dwi Adhi S, Ni Gusti Ayu Made Dwi Anggraeni Putri Suandi Ewa Satriawijaya Febby Hartesa W G M Arya Sasmita G.M.A. Sasmita Gunawan, A. A. Ngurah Gusti Ngurah Sutapa Hudi Nurwendi I Gde Antha Kasmawan I Gede Andy Andika Parahita I M. S. Negara I M. S. Negara I M. S. Negara I M. Trimastiya I Made Dupi Andika I Made Sutha Negara I Made Sutha Negara I Made Wisnu Adhi Putra I Nengah Artawan I Nengah Sandi I Nyoman Aribudiman I Nyoman Sumerta Miwada I Nyoman Suprapta Winaya I NYOMAN SUTARPA SUTAMA I Nyoman Widana I W BUDIARSA SUYASA I Wayan Redana I Wayan Suarsa I Wayan Sudiarta I Wayan Suditayasa I. M. S. Negara I.A.G. Widihati I.A.G. Widihati I.M.S. Negara Ida Ayu Agung Pradnyani Ida Bagus Made Suryatika Ika Umratul IM.S. Negara Ketut Gede Dharma Putra Komang Yogi Purnamawati M. Arsa M. Indra Dwitama M. W. Prayani Made Indra Dwitama Made Suryatika, Ida Bagus Muhammad Nasib N. K. A. Oktapiani N. K. D. Astuti N.M. Puspa wati Nanik Ayumi Ni G. A. M. Dwi Adhi Suastuti Ni Ketut Suminten Ni Komang Tria Paramita Septiari Ni LUH ARPIWI Ni Luh Eka Anggarayanti Ni Luh Nyoman Kebayantini Ni Luh Putu Suciptawati Ni Made Puspawati Ni Made Widya Pratiwi Ni Nyoman Pujianiki Ni Nyoman Rupiasih Ni Putu Diantariani Ni Putu Gita Bonita Dewi Ni Putu Widya Tironika Dewi Ni Wayan Trisnadewi, Ni Wayan O. Ratnayani O. Ratnayani O. Ratnayani Oka Ratnayani Olivia Carolyn Sitepu Prawistya Putra, I Made Gede Mas Putra Adnyana, I Gusti Agung Putra, Anak Agung Bawa Putu Suarya R. Dalem S. R. Mustikawati Sihotang, Erikson Sihotang, I Nyoman Sitanggang, Katrin Walensky Siti Helmyati Siti Zulaikah Sri Rahayu Santi Tri Lestari, Komang Ayu W. A. Fauzi Y. N. Handayani Y. Ulfa