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Journal : Media Ilmiah Teknologi Pangan (Scientific Journal of Food Technology)

Optimasi ph dan Suhu Proses Sakarifikasi Fermentasi Simultan dalam Produksi Bioethanol dari Ubi jalar Bambang Admadi Harsojuwono; I Wayan Arnata
Media Ilmiah Teknologi Pangan (Scientific Journal of Food Technology) Vol 1, No. 1, 2014
Publisher : Master Program of Food Science and Technology, Faculty of Agricultural Technology, Udayana University

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Abstract

The Research objective was to obtain the optimum pH and temperature of simultaneous fermentation scarification (SFS) process on the ethanol production of the sweet potato hydrolyzed. This research used the block random design with factorial experiment. First factor was pH (4.5 ; 5.0 ; 5.5) and the second factor was temperature (30, 35, 40 and 45 oC). The research was conducted with the following stages : production of sweet potato hydrolyzed by enzyme in the liquidation process, preparation of S. cerevisiae culture and simultaneous fermentation scarification process. The results showed that the optimum simultaneous fermentation scarification process on temperature of 35oC and pH 4,5 that produce the ethanol of 5,32% (v/v) with the ethanol produce efficiency of 35,79% ; fermentation efficiency of 70,16% and yield of 11,79%.Key words: sweet potato, simultaneous fermentation scarification, pH and temperature
Profil Permukaan Dan Gugus Fungsi Bioplastik Pati Singkong Termodifikasi Bambang Admadi Harsojuwono; I Wayan Arnata; Sri Mulyani
Media Ilmiah Teknologi Pangan (Scientific Journal of Food Technology) Vol 3 No 2 (2016)
Publisher : Master Program of Food Science and Technology, Faculty of Agricultural Technology, Udayana University

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Abstract

Tujuan penelitian adalah  mengidentifikasi profil permukaan dan gugus fungsi bioplastik yang terbuat dari pati singkong termodifikasi. Penelitian dilaksanakan dengan metode eksplorasi, yang diawali dari pembuatan bioplastik pati singkong termodifikasi dan dilanjutkan dengan mengamati profil permukaan bioplastik pati singkong termodifikasi pada sisi melintang dan membujur dengan menggunakan Scan Electron Microscope (SEM), serta mengidentifikasi gugus fungsi pada polimer yang terbentuk dalam bioplastik menggunakan spectrometer FTIR. Hasil peneltian menunjukkan bahwa profil permukaan bioplastik pada tampak membujur menunjukkan adanya jaringan-jaringan gel yang dibentuk oleh bahan polimer pati termodifikasi dengan rongga-rongga udara. Profil bioplastik pati singkong (tapioka) tampak samping atau melintang menampilkan susunan berlapis ke arah vertikal dengan ketebalan 379 mikron, sementara itu perbesaran 2500 kali tampak melintang menunjukkan jaringan-jaringan gel yang dibentuk oleh bahan polimer pati yang tersusun berbentuk gelombang atau ombak ke arah vertikal. Bioplastik yang dibentuk dari polimer pati termodifikasi mengandung gugus fungsi hidroksil (O-H) yang berikatan dengan hydrogen, alkana (C-H), aldehida (C-H), ikatan hidrogen asam karboksilat, alkuna (C=C), ester, senyawa aromatik sederhana, karboksil (C-O), alkena (C=C) serta hidrokarbon -(CH2)n.
Characteristic of bioplastic’s physical and mechanical (Study on Tapioca Concentration and Composition Mixture of Plasticizer) Bambang Admadi Harsojuwono; I Wayan Arnata
Media Ilmiah Teknologi Pangan (Scientific Journal of Food Technology) Vol 3 No 1 (2016)
Publisher : Master Program of Food Science and Technology, Faculty of Agricultural Technology, Udayana University

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Abstract

This study aims to (1) the effect of the concentration of starch and  ratio mixture of plasticizer to the physical and mechanical characteristics of bioplastics (2) determine the concentration of starch and plasticizer RATIO mixture  that results in physical and mechanical characteristics of bio plastics best. The experiment was conducted using a factorial randomized block design. The first factor is the concentration of tapioca consisting of 3 levels 4%, 5% and 6% (w / w). The second factor is the   mixture plasticizer ratio  of glycerol and sorbitol   consisting of 5 levels ie (100: 0)%, (95: 5)%, (90:10)%, (85:15)%, (80:20)% b / b. Each combination of treatments classified into 2 time  processing bio plastics, so there are 30 experimental units. Variables observed water content, elongation at break, tensile strength and Young's modulus . The data obtained were analyzed of variant and  test of Duncan's. The results showed that the concentration of tapioca and  mixture plasticizer had no effect on water content but significant effect on the elongation at break, tensile strength and Young's modulus. The concentration of starch 6% with a ratio of mixture of plasticizers glycerol: sorbitol ( 100: 0) produces the best characteristics of bioplastics with water content of 3.98%, elongation at break of 18.75%, the tensile strength of 930 MPa and a Young's modulus of 50 MPa.
Co-Authors A.A.S. A. Sukmaningsih Aditya Nandika A.J Amirrulloh, Muchammad Rizqi Amna Hartiati Anak Agung Made Dewi Anggreni Anak Agung Sagung Inten Mahasari Putri Arnita Adriani Purba Bambang Admadi Bambang Admadi H Bambang Admadi Harjosuwono Bambang Admadi Harsojuwono Bangkit Dwi Satryo Desi Lusiani Pasaribu Dewi Sartika Dimas Anggi Ananta Dwi Setyaningsih G. W. Wirayuda G.P. Ganda Putra Gede Gora Adrista Gusti Ayu Gayatri Amasdenia Sukarno I Gusti Agung Ayu Mirah Pradnya Dewi I Gusti Agung Ayu Utami Andari I Gusti Putu Ganda Putra I Kadek Punia Atmaja I Ketut Satriawan I Komang Putra Adnyana I Komang Rai Wisnawa Putra I Made Adi Parimartha I Made Ari Kharismananda Jagatkirana I Made Arif Sukmawan I Made Mahaputra Wijaya I Made Mahaputra Wijaya I Made Mahaputra Wijaya i made mateo nautillus I Made Sugiastawa I Made Topan Wira Aristya I W.G. SEDANA YOGA I Wayan Angga Sukma I Wayan Rai Widarta I. Setyawati Ida Ayu Adi Ida Ayu Gede Satwika Candra Praba Sari Ida Ayu Sinta Citra Pertiwi Ida Bagus Ananta Wibawa Ida Bagus Wayan Gunam Ida Bagus Wiryasuta Yudiantara Intan Tiar Malau K.G. Govardhana Sutha Karina Novita Dewi Lilis Banne Paseru Luh Putu Wrasiati Lutfi Suhendra MADE AYU DHAVA VAGISVARI GIRI PUTRI MADE PHARMAWATI Made Puspa Aridona Manika Santhi Marchela Milenia Rindany Monica Rusiyantoro Muhammad Iqbal N.L. Yulianti Ni Made Heni Epriyanti Ni Made Wartini Ni Made Wartini Ni Putu Mega Triasswari Ni Wayan Anik Satria Dewi Ni Wayan Anita Ni Wayan Nadia Martaningsih Sutarsa Ninik Indah Purwati Nur Azizah Diniari Nur Richana NYOMAN SEMADI ANTARA Pranayasa, Wayan Angga Pupung Ferdiansyah Putra, Ferdi Prayoga Rian Hakim Richard Howard Patty Sadyasmara, Cokorda Anom Bayu Sri Mulyani Sri Mulyani Tuti Herlina Br.Naibaho