Edy Supriyo
Department Of Industrial Chemical Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275

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Journal : METANA

Optimasi Pembuatan Kitosan Dari Limbah Cangkang Bekicot (Achatina fulica) Menggunakan Factorial Design 2 Pangkat 3 Intan Septiani; Edy Supriyo
METANA Vol 18, No 1 (2022): Juni 2022
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/metana.v18i1.46292

Abstract

Kitosan merupakan padatan yang berwarna putih kecoklatan, bersifat nontoksit, biodegradable dan biocompatible. Mengolah cangkang bekicot menjadi kitosan melalui tiga proses yaitu deproteinasi yang bertujuan untuk menghilangkan protein, demineralisasi untuk menghilangkan mineral, dan deasetilasi untuk menghilangkan gugus asetil yang masih terikat pada kitosan. Penelitian ini dilakukan untuk mengetahui mutu kitosan yang dihasilkan dari cangkang bekicot dan pengaruh waktu (160 dan 180 menit), rasio (1 : 6,5 dan 1 : 7,5) dan suhu (85oC dan 95oC) pada proses deasetilasi terhadap % kadar air yang dihasilkan dan dilakukan proses optimasi dengan variasi waktu deasetilasi untuk menentukan % kadar air kitosan cangkang bekicot. Dari penelitian pembuatan kitosan dari cangkang bekicot didapatkan kondisi optimum proses deasetilasi pada waktu 160 menit, rasio kitin : NaOH 1 : 6,5 dan suhu 95oC dengan kadar air sebesar 2,2%. Kitosan yang didapatkan memiliki kadar abu sebesar 95,19%, berwarna putih, kitosan yang terbentuk sebesar 9,98% dan kitosan yang dihasilkan dapat digunakan sebagai pengawet bakso dengan masa simpan selama 3 hari.   Chitosan is solid with brownish-white color, non-toxic, biodegradable, and biocompatible. Processing snail shells into chitosan go through three processes, namely deproteination which aims to remove protein, demineralization to remove minerals, and deacetylation to remove acetyl groups. This research was conducted to determine the quality of chitosan produced from snail shells and effect of time (160 and 180 minute), ratio (1:6,5 and 1:7,5) and temperature (85oC and 95oC) in the deacetylation process to the % water content and an optimization process with time variations in deacetylation time to determine the % water content of snail shell chitosan. From the research making chitosan from snail shell it was found that the optimum conditions for the deacetylation process were 160 minutes, the ratio of chitin: NaOH 1:6.5, and a temperature of 95oC with a water content of 2.2%. The chitosan obtained has an ash content of 95.19%, is white, the chitosan formed is 9.98% and the resulting chitosan can be used as a meat ball preservative with a shelf life of 3 days.
OPTIMASI PRODUKSI PROTEIN SEL TUNGGAL DARI BAGASE TERHIDROLISA DENGAN FERMENTASI OLEH SACCAROMYCES CEREVICEAE Isti Pudjihastuti; Margaretha T S; Wahyuningsih Wahyuningsih; Edy Supriyo
METANA Vol 8, No 02 (2012): Desember 2012
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (159.631 KB) | DOI: 10.14710/metana.v8i02.6810

Abstract

The Came pulp (bagase) were main contained cellulose, through process delignification and hidrolized can be used to growting sacaromyces cereviceae yeast as fermented media, so can produced biomass microbial as known as single cell protein (SCP).Design experiment was random block with treatment nutrient added as long as fermented process. The measured parameter were protein contained in microbial biomass with Kehjdahl method. Optimum result were formed to 8 days fermentation and nutrient added (NH4)2SO4:1 gr,MgSO47H2O : 0,5 gr, molase (tetes) 20% : 2 ml to media 50 gr. Key word: bagase, Saccaromyces Cereviceae,SCP
Biokatalisator Lipase Dedak Padi Untuk Proses Asidolisis Minyak Tuna Dan Asam Laurat Wahyuningsih Wahyuningsih; Edy Supriyo; R.T.D. Wisnu Broto
METANA Vol 14, No 1 (2018): Juni 2018
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (876.074 KB) | DOI: 10.14710/metana.v14i1.18658

Abstract

Lipid terstruktur dengan medium chain fatty acid (MCFA) pada posisi luar dan polyunsaturated fatty acid (PUFA) pada posisi sn-2 memiliki nilai gizi dan absorbsi yang sangat baik. Dalam penelitian ini lipid terstruktur disintesis secara langsung melalui asidolisis enzimatis antara minyak ikan dan asam laurat. Reaksi dikatalisis oleh lipase dedak padi. Tujuan penelitian ini adalah mempelajari  perilaku dari reaksi asidolisis enzimatik minyak ikan tuna dan asam laurat, dengan kajian pengaruh biokatalis lipase dedak padi terhadap hasil asidolisis. Target yang ingin dicapai berupa data-data teknis laboratorium untuk perancangan, scale-up dan pengoperasian proses yang meliputi kinetika reaksi, studi produktifitas asam lemak, kondisi operasi yang optimum dan analisa tekno-ekonomi. Hasil penelitian menunjukkan bahwa konsentrasi lipase dan suhu reaksi optimum berturut-turut 10% dan 50oC. Rasio mol optimum minyak ikan dan asam laurat adalah 1:10, dihasilkan inkorporasi asam laurat mencapai 62,8 mol%. Pada waktu inkubasi 12 jam, trigliserida menurun seiring dengan meningkatnya waktu inkubasi, sedangkan digliserida meningkat seiring dengan meningkatnya waktu inkubasi. Pada suhu reaksi di atas 50oC, trigliserida menurun seiring dengan meningkatnya suhu reaksi. Metode interesterifikasi ini cukup efektif untuk mensintesis lipid terstruktur spesifik. Lipase dapat digunakan dengan baik untuk sintesa Lipid Terstruktur dari minyak ikan tuna dengan asam laurat. Kondisi optimum reaksi adalah pada suhu 50oC, konsentrasi lipase 10%, perbandingan ratio substrat (Minyak ikan tuna : asam laurat) 1:10 selama 12 jam. Profil gliserida dari hasil asidolisis enzimatis adalah  78,1 % trigliserida, 32,2 % digliserida dan 11,9% monogliserida Lipase Rice Bran Biocatalystator For Asidolysis Process Tuna Oil And Lauric Acid Lipid structured with medium chain fatty acids (MCFA) in the outer position and polyunsaturated fatty acid (PUFA) in sn-2 position has excellent nutritional value and absorption. In this study structured lipids were synthesized directly through enzymatic acididisation between fish oil and lauric acid. The reaction was catalyzed by a specific lipase of 1.3 from the tertiary carotid rugose. The aim of this study was to study the behavior of enzymatic acidic reactions of tuna and lauric acid oils, with the study of the effect of rice bran biocatalyst on acidic acid yield. The targets to be achieved are technical laboratory data for design, scale-up and operation of processes including reaction kinetics, fatty acid productivity studies, optimum operating conditions and techno-economic analysis. The results showed that the optimum lipase concentrate  and temperature of the reaction were 10% and 50oC, respectively. The mole ratio of fish oil and lauric acid was 1:10 in which the incorporation of lauric acid was 62,80% (mol). Incubation time, 12 h, triglyceride decreased with an increase in incubation time. In contrast, the diglyceride increased with an increase in incubation time. At temperature higher than 50oC, triglyceride decreased with an increase in reaction temperature. The methode of interesterification was proven to be effective in synthezed specific structured lipids. Lipase rice brand, can be used successfully for the synthesis of structured lipids from tuna oil with lauric acid. Optimum reaction temperature is 50oC, lipase concentration of 10%, the ratio of substrate ratio (tuna fish oil: lauric acid) 1:10 for time incubation 12 hours. Profile gliseride from results acidolysis enzymatic triglycerides were 78.1%, 32.2% 11.9% diglycerides and monoglycerides.
TEKNOLOGI PRODUKSI PUPUK ORGANIK CAIR DARI LIMBAH SAMPAH RUMAH TANGGA DI KELURAHAN LEMPONGSARI, KODYA SEMARANG DENGAN KOMPOSER EM-4 Wahyuningsih Wahyuningsih; Edy Supriyo
METANA Vol 9, No 01 (2013): Juli 2013
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (270.528 KB) | DOI: 10.14710/metana.v9i01.7205

Abstract

Abstract In Semarang limited landfill waste,new problems.If problems not handled and managed properly,an increase of waste that occur each year could shorten justify the air.In addition,the waste can the quality of natural resources,causing floods,and cause some diseased. Research to be conducted has several specific objectives,as follomposer EM-4.Minimizing the volume of waste in Semarang environment develop a network tool composter for organic fertilizer production of large-scale environmental and examine the addition of decomposers EM-4 the formation of humus to improve the productivity of organic fertilizer in environmentally friendly, operating condition optimization weathering process household waste using waste decomposer EM-4. Composter network of productivity environmentally friendly is expected to replace the function of inorganic fertilizers Research results:the best is on addition EM-4 8 ppm,with the following results:value ratio C/N 14,77;P2O5 1,24%;K2O 0,42%  SNI: ratio C/N 10-20 ;0,1% min P2O5 ;0,2%min K2O Keyword: EM-4 composer,liquid compost organic,organic waste