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All Journal Jurnal Ilmu Pertanian Indonesia VALENSI Jurnal Teknik Mesin Chimica et Natura Acta Jurnal Biologi Tropis Jurnal Sinergitas PkM & CSR Santika : Jurnal Ilmiah Sains dan Teknologi Jurnal Kimia dan Kemasan Jurnal Energi Baru dan Terbarukan Berkala Ilmiah Kimia Farmasi AKM: Aksi Kepada Masyarakat Journal of Scientech Research and Development Jurnal Teknologi dan Inovasi Industri
Dikdik Mulyadi
Universitas Muhammadiyah Sukabumi
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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Journal : VALENSI

 1 
Pengaruh Aktivasi Arang Aktif dari Tongkol Jagung dan Tempurung Kelapa Terhadap Luas Permukaan dan Daya Jerap Iodin Lela Mukmilah Yuningsih; Dikdik Mulyadi; A Jaka Kurnia
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v2i1.3091

Abstract

The activated charcoal can be produced from various raw material which contains carbon such as corn cobs and coconut shell. Generally, activated charcoal made through activation process with added chemical materials. The kind of activator will give different influence on surface area or pores volume of the result activated charcoal. In this study, will be made activated charcoal from corn cobs and activated by physical and chemical with KOH activator. Carbonation process is performed at 800oC for 2 hours and followed by chemical activation process by KOH with mass ratio water: charcoal: KOH is 1:1:4, then activated by physical at 600oC for 4 hours. Conducted test on sample contain iodine adsorption and SEM. As a result, iodine adsorption of activated charcoal indicated at KOH 20%. the best adsorption of coconut shell activated charcoal is 1240.233 mg/g with surface area 2352.851 m2/g, while corn cobs activated charcoal is 1133.757 mg/g with surface area 2150.866 m2/g. Morphology of activated charcoal with KOH 20% have pore structure with high 22.63 µm and wide 26.41 µm, the resulting pore size included into macropores structure. Keywords: Activated charcoal, carbonation, activation, adsorption, surface area. DOI: http://dx.doi.org/10.15408/jkv.v2i1.3091
Preparation and Characterization of Chitosan Membranes from Crab Shells (Scylla olivacea) for Beverage Preservative Reni Mulyani; Dikdik Mulyadi; Nopriana Yusuf
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 5, No. 2, November 2019
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (734.623 KB) | DOI: 10.15408/jkv.v5i2.10637

Abstract

Chitosan can extend the shelf life of food and can be used in food preservation. Chitosan is derived from the shell of the animal crustacean, and is a derivative of the chitin polymer. This study aimed to determine the effectiveness of the use of chitosan membrane as an antibacterial compound and its application in pineapple juice products. Chitosan isolation is carried out through three stages, namely deproteination, demineralization, and deacetylation. Determination of the degree of deacetylation using the infrared spectroscopy method and the preservative effectiveness test was carried out based on SNI 01-2332.3-2006 concerning the testing of the Total Plate Count (ALT). Crab chitosan obtained from white-brown isolation results, soluble in 1% acetic acid and the value of the degree of deacetylation (DD) of chitosan crab is 81%. The addition of 1.5% crab chitosan membrane to pineapple juice can reduce bacterial growth until the 20th day with a total plate value (ALT) of 9.1x103 CFU / ml.
Efektivitas Pemanfaatan Serbuk Gergaji dan Limbah Media Tanam Jamur (Baglog) sebagai Bahan Baku Pembuatan Biogas Dikdik Mulyadi; Lela Mukmilah Yuningsih; Desi Kusumawati
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (238.628 KB) | DOI: 10.15408/jkv.v2i1.3100

Abstract

Biogas is  one of energy   that can be produced by anaerobic fermentation of the organic compounds. The objective of this study was to determine the effectiveness of the utilization of waste of media  mushroom growth (baglog) with sawdust as raw material for biogas with  cow dung  activators. The study was conducted through anaerobic fermentation of the samples containing waste baglog (sample 1) and sawdust (sample 2), with the addition of cow manure activator to each sample. Both of these samples do anaerobic fermentation for 32 days, then measuring the volume of biogas every 4 days for 32 days. Methane content  in  samples 1 and 2 measured by  using gas chromatography. To see the effect of the addition of activators cow dung biogas volume measurement was  carried out with  cow dung without addition baglog waste and sawdust. The process of degradation baglog and sawdust with an activator of cow dung could be observed  in  some of the parameters through  total solids (TS), total volatile solids (TVS), volatile fatty acids (VFA), the degree of acidity (pH), and C/N ratio. The results showed that effectiveness of sample 1 resulted in the everage of total volume biogas 28% higher than  sample 2. The content of methane in  sample 1  and sampel 2  was 54% %, and 0.21% respectively. The fermentation process biogas production in this experiment  was carried out  at pH 7, with a value of TS, TVS and VFA showed a decrease  trend after the fermentation process,  C/N ratiowas  lower than the baglog waste sawdust until day 32 retention time. Keywords: Sawdust, baglog waste, biogas, fermentation, methane DOI : http://dx.doi.org/10.15408/jkv.v2i1.3100
Co-Authors . Suryatna A Jaka Kurnia Agustina, Rosita Aji Achmad Saputra Aneu Aryani Pratiwi Desi Kusumawati Devi Indah Anwar Devia Indriani Harfan, Anita Anida Hidayah, Lutfia La Ode Sumarlin Lela Lailatul Khumaisah Lela Laitul Khumaisah Lela Mukmilah Y Lela Mukmilah Yuningsih Muhammad Nurul Fajar Mukmilah Yuningsih, Lela Nopriana Yusuf Rahayu, Agustina Reni Mulyani Salih Muharam Siti Rohani Sugiarti Rahayu Supendi, Arif Tania Ardisa Turdini, Shopi Yoga Asmara