Heri Hermansyah
Departemen Teknik Kimia, Fakultas Teknik, Universitas Indonesia, Depok, 16424, Indonesia

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DEMINERALISASI DAN DEPROTEINASI KULIT UDANG SECARA KONTINYU PADA TAHAPAN EKSTRAKSI KITIN SECARA BIOLOGIS waltam, deden rosid; Hermansyah, Heri; Setyahadi, siswa
Jurnal Sciene dan Teknologi Vol 12, No 1 (2010): JURNAL SAINS DAN TEKNOLOGI INDONESIA
Publisher : Jurnal Sciene dan Teknologi

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Abstract

Chitin extraction in industry has been conducted by chemical process. The process has been known as a harsh treatment that badly affected to chitin quality, equipment and the environment. Since the last decade biologically chitin extractionhas more attracted attention. The biologically chitin extraction was conducted by batch fermentation or subsequent-batch fermentation. Continous demineralization and deproteinization is a new inovation on biologically chitin production technology.This system promises as an alternative technology for  overcoming problems of batch fermentation process and chemical process. The objectives of the experiment was to obtain the optimal condition for continous deminineralizationand deproteinization for producing chitin from Panaeus  vannamei shrimp shells. Lactobacillus acidophilus FNCC 116 and Bacillus licheniformis F11.1 was used for demineralization and deproteination process respectively. The results showed that the best condition for continuous demineralization was 6,5% glucose feed, with 16 hours retention time. For continuous deproteinization, the best condition was with 12 hours retention time. The process could remove 92.95% ash and 91.40% protein. The chitin, ash, and protein content of chitin product was 96.69%, 1.44% and 1,76% respectively.
DEMINERALISASI DAN DEPROTEINASI KULIT UDANG SECARA KONTINYU PADA TAHAPAN EKSTRAKSI KITIN SECARA BIOLOGIS waltam, deden rosid; Hermansyah, Heri; Setyahadi, siswa
Jurnal Sains dan Teknologi Indonesia Vol 12, No 1 (2010)
Publisher : Jurnal Sains dan Teknologi Indonesia

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Abstract

Chitin extraction in industry has been conducted by chemical process. The process has been known as a harsh treatment that badly affected to chitin quality, equipment and the environment. Since the last decade biologically chitin extractionhas more attracted attention. The biologically chitin extraction was conducted by batch fermentation or subsequent-batch fermentation. Continous demineralization and deproteinization is a new inovation on biologically chitin production technology.This system promises as an alternative technology for  overcoming problems of batch fermentation process and chemical process. The objectives of the experiment was to obtain the optimal condition for continous deminineralizationand deproteinization for producing chitin from Panaeus  vannamei shrimp shells. Lactobacillus acidophilus FNCC 116 and Bacillus licheniformis F11.1 was used for demineralization and deproteination process respectively. The results showed that the best condition for continuous demineralization was 6,5% glucose feed, with 16 hours retention time. For continuous deproteinization, the best condition was with 12 hours retention time. The process could remove 92.95% ash and 91.40% protein. The chitin, ash, and protein content of chitin product was 96.69%, 1.44% and 1,76% respectively.
Performance Optimization of Microbial Fuel Cell (MFC) Using Lactobacillus bulgaricus Arbianti, Rita; Utami, Tania; Hermansyah, Heri; Novitasari, Deni; Kristin, Ester; Trisnawati, Ira
Makara Journal of Technology Vol 17, No 1 (2013)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

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Abstract

Electrical energy needs in Indonesia are expected to continue to rise. The use of petroleum as a source of energy still dominates, although oil reserves in Indonesia are increasingly being depleted. Therefore, there is a need to develop alternative sources of sustainable energy, such as microbial fuel cell (MFC). In this study, Lactobacillus bulgaricus was used as an electricity producer in a dual-chamber MFC reactor. We investigated the maximum electrical energy by varying the bacterial optical density (OD), the operational time of MFC, the reactor volume, the electrolyte solution, and the configuration of MFC reactor. In this study, the maximum electrical energy (201.8 mW/m2) was generated at an OD of 0.5 in an MFC reactor series using potassium permanganate as the electrolyte solution.
Utilization of Bagasse Cellulose for Ethanol Production through Simultaneous Saccharification and Fermentation by Xylanase Samsuri, M; Gozan, Misri; Mardias, R; Baiquni, M; Hermansyah, Heri; Wijanarko, Anondho; Prasetya, Bambang; Nasikin, Mohammad
Makara Journal of Technology Vol 11, No 1 (2007)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

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Abstract

Bagasse is a solid residue from sugar cane process, which is not many use it for some product which have more added value. Bagasse, which is a lignosellulosic material, be able to be use for alternative energy resources like bioethanol or biogas. With renewable energy resources a crisis of energy in Republic of Indonesia could be solved, especially in oil and gas. This research has done the conversion of bagasse to bioethanol with xylanase enzyme. The result show that bagasse contains of 52,7% cellulose, 20% hemicelluloses, and 24,2% lignin. Xylanase enzyme and Saccharomyces cerevisiae was used to hydrolyse and fermentation in SSF process. Variation in this research use pH (4, 4,5, and 5), for increasing ethanol quantity, SSF process was done by added chloride acid (HCl) with concentration 0.5% and 1% (v/v) and also pre-treatment with white rot fungi such as Lentinus edodes (L.edodes) as long 4 weeks. The SSF process was done with 24, 48, 72, and 96 hours incubation time for fermentation. Variation of pH 4, 4,5, and 5 can produce ethanol with concentrations 2,357 g/L, 2,451 g/L, 2,709 g/L. The added chloride acid (HCl) with concentration 0.5% and 1% (v/v) and L. edodes can increase ethanol yield, The highest ethanol concentration with added chloride acid (HCl) concentration 0.5% and 1% consecutively is 2,967 g/L, 3,249 g/L. The highest ethanol concentration with pre-treatment by L. edodes is 3,202 g/L.
Kinetic Model For Triglyceride Hydrolysis Using Lipase:Review Hermansyah, Heri; Wijanarko, Anondho; Dianursanti, Dianursanti; Gozan, Misri; Wulan, Praswasti P. D.K; Arbianti, Rita; Soemantojo, Roekmijati W.; Utami, Tania Surya; Yuliusman, Yuliusman; Kubo, Momoji; Shibasaki-Kitakawa, Naomi; Yonemoto, Toshiy
Makara Journal of Technology Vol 11, No 1 (2007)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

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Abstract

Triglyceride hydrolysis using lipase has been proposed as a novel method to produce raw materials in food and cosmetic industries such as diacylglycerol, monoacylglycerol, glycerol and fatty acid. In order to design a reactor for utilizing this reaction on industrial scale, constructing a kinetic model is important. Since the substrates are oil and water, the hydrolysis takes place at oil-water interface. Furthermore, the triglyceride has three ester bonds, so that the hydrolysis stepwise proceeds. Thus, the reaction mechanism is very complicated. The difference between the interfacial and bulk concentrations of the enzyme, substrates and products, and the interfacial enzymatic reaction mechanism should be considered in the model.
Biomass Production Chlorella Vulgaris Buitenzorg Using Series of Bubble Column Photo Bioreactor with a Periodic Illumination Wijanarko, Anondho; Dianursanti, Dianursanti; Muryanto, Muryanto; Simanjuntak, Josia; Wulan, Praswasti; Hermansyah, Heri; Gozan, Misri; Soemantojo, Roekmijati
Makara Journal of Technology Vol 12, No 1 (2008)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

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Abstract

Chlorella vulgaris Buitenzorg cultivation using three bubble column photo bioreactors arranged in series with a volume of 200 mL for 130 hours shows an increase of biomass production of Chlorella vulgaris Buitenzorg up to 1.20 times and a decrease of the ability of CO2 fixation compared to single reactor at a periodic sun illumination cycle. The operation conditions on cultivation are as following: T, 29.0oC; P,1 atm.; UG, 2.40 m/h; CO2, 10%; Benneck medium; and illumination source by Phillip Halogen Lamp 20W /12V/ 50Hz. Other research parameters such as microbial carbon dioxide transferred rate (qco2), CO2 transferred rate (CTR), energy consumption for cellular formation (Ex), and cultural bicarbonate species concentration [HCO3] also give better results on series of reactor.
Fotodegradasi Fenol Dengan Katalis TiO2 P25 Berpenyangga Batu Apung Hendarsa, Agung Sri; Tanuwijaya, Jessica; V.N., Catur Nitya; Hermansyah, Heri; Slamet, Slamet
Jurnal Kimia dan Kemasan Vol. 35 No. 1 April 2013
Publisher : Balai Besar Kimia dan Kemasan

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Abstract

Modifikasi fotokatalis TiO2 dengan batu apung sebagai penyangga untuk mendegradasi senyawa fenol telah dilakukan. Batu apung yang sudah mengalami perlakuan awal dilapisi oleh sol TiO2, yang berasal dari prekursor TiO2 P25, dengan menggunakan metode dip coating. Komposit TiO2-batu apung tersebut dikarakterisasi dengan SEM-EDS dan BET, kemudian diaplikasikan untuk mendegradasi fenol dengan menggunakan reaktor batch yang dilengkapi oleh lampu merkuri 250 W. Konsentrasi fenol dianalisis dengan Spektrofotometer UV-Vis. Hasil eksperimen menunjukkan bahwa penambahan udara pada sistem reaksi dapat meningkatkan kinerja katalis komposit. Pengaruh tersebut lebih nyata pada komposit dengan loading TiO2 rendah (2,5%) yang mencapai sekitar 5 kali lipat. Pada katalis 2,5%TiO2-batu apung, laju alir udara optimal dicapai pada 100 ml/menit, dengan tingkat degradasi terhadap 10 ppm fenol mencapai 100% selama 2,5 jam. Sementara itu pada katalis 25%TiO2-batu apung, waktu yang dibutuhkan untuk degradasi fenol sampai batas baku mutu (0,5 ppm) pada konsentrasi awal fenol 10 ppm, 50 ppm, 100 ppm, dan 1000 ppm masing- masing adalah 3 jam; 5,7 jam; 6,9 jam; dan 16,9 jam. 
BIONANOKOMPOSIT : PELUANG POLIMER ALAMI SEBAGAI MATERIAL BARU SEMIKONDUKTOR ., Nuryetti; Hermansyah, Heri; Nasikin, Muhammad
Jurnal Riset Industri Vol 6, No 1 (2012): Hilirisasi Industri Berbasis Sumber Daya Alam Lokal
Publisher : Badan Penelitian dan Pengembangan Industri

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Abstract

Bionanokomposit adalah material generasi baru dari nanokomposit yang muncul di bidang ilmu pengetahuan material dan teknologi nano. Bionanokomposit adalah gabungan dari matrik polimer alami dari bahan pengisi organik lanorganik  yang berukuran nano. Saat ini usaha pegembangan nanokomposit berbahan polimer alami difokuskan pada peningkatan sifat-sifat mekanik dan panas dan sifat fungsionalnya.Polimer alami sebagai sumber yang dapat diperbaharui seperti protein, polisakarida dan lemak. Material ini memiliki potensi yang besar untuk digunakan sebagai material semikonduktor.Dengan melihat kebutuhan akan material semikonduktor yang terus meningkat dan bahan baku polimer alami (pati) di  Indonesia yang berlimpah, merupakan peluang yang    cukup menjanjikan untuk pengembangan bionanokomposit sebagai material semikonduktor di Indonesia. Artikel ini akan membahas tentang bionanokomposit yang berbahan dasar polimer alami, proses pembuatan, karakteristik dan peluang penggunaan polimer alami sebagai bahan pembuatan bionanokomposit. Keywords: polimer alami, plastik, bionanokomposit, proses pembuatan, aplikasi.
BIONANOKOMPOSIT : PELUANG POLIMER ALAMI SEBAGAI MATERIAL BARU SEMIKONDUKTOR ., Nuryetti; Hermansyah, Heri; Nasikin, Muhammad
Jurnal Riset Industri Vol 6, No 1 (2012): Hilirisasi Industri Berbasis Sumber Daya Alam Lokal
Publisher : Badan Penelitian dan Pengembangan Industri

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Abstract

Bionanokomposit adalah material generasi baru dari nanokomposit yang muncul di bidang ilmu pengetahuan material dan teknologi nano. Bionanokomposit adalah gabungan dari matrik polimer alami dari bahan pengisi organik lanorganik  yang berukuran nano. Saat ini usaha pegembangan nanokomposit berbahan polimer alami difokuskan pada peningkatan sifat-sifat mekanik dan panas dan sifat fungsionalnya.Polimer alami sebagai sumber yang dapat diperbaharui seperti protein, polisakarida dan lemak. Material ini memiliki potensi yang besar untuk digunakan sebagai material semikonduktor.Dengan melihat kebutuhan akan material semikonduktor yang terus meningkat dan bahan baku polimer alami (pati) di  Indonesia yang berlimpah, merupakan peluang yang    cukup menjanjikan untuk pengembangan bionanokomposit sebagai material semikonduktor di Indonesia. Artikel ini akan membahas tentang bionanokomposit yang berbahan dasar polimer alami, proses pembuatan, karakteristik dan peluang penggunaan polimer alami sebagai bahan pembuatan bionanokomposit. Keywords: polimer alami, plastik, bionanokomposit, proses pembuatan, aplikasi.
Pengaruh Aktivitas Shalat Terhadap Kontrol Glikemik Penderita DM Tipe 2 di Wilayah Kerja Dinas Kesehatan Kabupaten Kuningan Hendriana, Yana; Hermansyah, Heri
Jurnal Ilmu Kesehatan Bhakti Husada: Health Sciences Journal Vol 6 No 2 (2017): Jurnal Ilmu Kesehatan Bhakti Husada
Publisher : Sekolah Tinggi Ilmu Kesehatan Kuningan

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Abstract

Type 2 Diabetes mellitus (DM) is a chronic disease of carbohydrate, fat, and protein metabolism disorders, which is characterized by elevated chronic blood glucose (hyperglycemia) levels. The sustainable hyperglycemia is able to cause disruption of the entire system of body. This research aimed at finding out the influence of the five-time prayer implementation on the decrease of fasting blood glucose level of type 2 diabetes mellitus. The study employed a quasi experimental research by one group pre and post test design without control group. The number of samples of 15 respondents was determined by purposive sampling technique. The result of statistical analysis showed that there was the significant influence between the five-time prayer implementation and the decrease of fasting blood glucose, the average decrease was 93,113 and p value=0,000. The decrease in fasting blood glucose after the intervention of prayer activity in the form of the implementation of five-day prayers for 3 days caused by the body's physiological effects enhanced GLUT 4 translocation and increase the psychological effects of mind relaxation that occurred during the five-time prayer practice