Atiqa Rahmawati - Academia.edu (original) (raw)
Papers by Atiqa Rahmawati
Jurnal Teknik Kimia dan Lingkungan
Beluntas (Pluchea Indica L.) which commonly used as astringent and antipyretic has a high potenti... more Beluntas (Pluchea Indica L.) which commonly used as astringent and antipyretic has a high potential for the feedstock of essential oil production. The objective of this work is to optimize solvent-free microwave extraction (SFME) of Beluntas leaves by using response surface methodology (RSM). Box-Behnken Design with the variations of extraction time (60-120 min), feed/distiller ratio (0.06-0.1 g/ml), and heating power (150-450 W) was utilized to optimize essential oil yield. The feed/distiller ratio factor had the highest significant effect on the essential oil yield (P<0.05). Essential oil yield increased as the increase of oil heating power and time extraction, and vice versa. On the other hand, the increase in the feed/distiller ratio gave a negative impact on the essential oil yield. The maximum essential oil yield using SFME method of 0.2728 b/b% was obtained for the optimized condition of extraction time of 90 min, microwave heating power of 450 W, and feed/distiller ratio ...
Journal of Biobased Chemicals
Bioethanol is a form of renewable energy that is used to reduce dependence on the use of fossil f... more Bioethanol is a form of renewable energy that is used to reduce dependence on the use of fossil fuels which cause various negative impacts on the environment. Ulva sp. contains high carbohydrates so it has the potential as a raw material for bioethanol production. This study aims to determine the optimum conditions of the fermentation process with the variables used time, pH, and yeast concentration. This study used the results of hydrolysis of Ulva sp. with optimum operating conditions of 0.1 N HCl concentration, 80 mesh particle size, and 450 watt microwave power. Measurement of bioethanol levels was carried out using an alcoholmeter. The results showed that the optimal conditions for fermentation were 7 days of fermentation, pH 5.5, and yeast concentration of 1.5% which resulted in a bioethanol content of 7.55%.
Journal of Biobased Chemicals
The Pegagan plant has a scientific name in the form of Centella asiatica L. which is included in ... more The Pegagan plant has a scientific name in the form of Centella asiatica L. which is included in the Centella genus, Apiaceae family, and kingdom Plantae. Pegagan (Centella asiatica L.) has distinctive bioactive components, namely triterpene ester glycoside compounds in the form of asiaticoside and madecassoside, and triterpene group compounds in the form of Asiatic acid and madecassic acid. In this study, the extraction of bioactive components from pegagan was carried out using the Microwave-Assisted Extraction (MAE) method and will study the effect of ethanol solvent concentration in the extraction of bioactive compounds. Analysis of the extracted bioactive content was carried out by analyzing the total phenol content using the Folin-Ciocalteau reagent and ANOVA analysis. The results obtained from the study were in the form of total phenol content as an indication of the presence of bioactive compounds, namely at operating conditions of 450 watts of power, 50% ethanol concentratio...
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Ampas tebu merupakan suatu limbah atau residu dari proses penggilingan tebu yang telah diambil ni... more Ampas tebu merupakan suatu limbah atau residu dari proses penggilingan tebu yang telah diambil niranya. Ketersediaan ampas tebu berdasarkan data dari P3GI sekitar 2991 juta ton pertahun. Sedangkan ampas tebu dari PG Madukismo Yogyakarta menghasilkan sekitar 1400 ton perhari. Salah satu pemanfaatan ampas tebu yaitu digunakan sebagai bahan baku pembuatan karbon aktif. Adsorben karbon aktif berbahan baku biomassa seperti ampas tebu dapat digunakan sebagai adsorben untuk penyerapan limbah cair, zat warna, dan juga logam berat. Tujuan dari penelitian ini yaitu pemanfaatan limbah ampas tebu untuk dijadikan karbon aktif dengan aktivasi secara kimia. Proses aktivasi secara kimia dalam penelitian menggunakan ZnCl2. Penggunaan ZnCl2 dikarenakan dapat meningkatkan permukaan pori, dapat menghambat pelepasan tar selama karbonasi dan mendukung reaksi kondensasi. Metode penelitian yang digunakan yaitu dengan proses perendaman karbon dalam larutan ZnCl2 dengan konsentrasi 10%, 30%, dan 50% selama 2...
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Kulit hewan secara alami mengandung berbagai macam tipe mikroorganisme. Mikroorganisme yang terda... more Kulit hewan secara alami mengandung berbagai macam tipe mikroorganisme. Mikroorganisme yang terdapat pada kulit hewan mampu berkembang biak dengan cepat dikarenakan pada kulit hewan terdapat sumber nutrisi, berkadar air tinggi, pH dan suhu yang sesuai di lingkungan penyamakan. Kulit awetan di gudang penyimpanan kulit Politeknik ATK yang menumpuk akibat Pandemi Covid-19 menjadi masalah yang belum terselesaikan. Pemanfaatan kulit awetan yang menumpuk dengan cara mengisolasi bakteri yang terdapat pada kulit tersebut. Salah satu bakteri yang terdapat pada kulit yaitu bakteri proteolitik, dimana bakteri proteolitik dapat menghasilkan enzime protease. Enzim protease mempunyai peranan penting dalam proses penyamakan kulit yang ramah lingkungan. Tujuan dari penelitian ini yaitu mengisolasi bakteri proteolitik penghasil enzim protease dari tumpukan kulit sapi, kambing dan domba yang telah tersimpan dengan metode penggaraman selama satu tahun di gudang penyimpanan Politeknik ATK Yogyakarta. P...
Sewagati
Kabupaten Jember memiliki Lembaga Pemasyarakatan (Lapas) klas II A yang berlokasi di tengah kota ... more Kabupaten Jember memiliki Lembaga Pemasyarakatan (Lapas) klas II A yang berlokasi di tengah kota Jember. Sampah yang dihasilkan di Lapas cukup banyak. Jumlah sampah yang dihasilkan semakin meningkat seiring dengan meningkatnya jumlah penghuni Lapas. Namun, jika sampah yang ada tidak dimanfaatkan dengan baik akan langsung mencemari lingkungan. Solusi yang ditawarkan pada kegiatan ini adalah mendapatkan sumber energi baru agar lebih ekonomis. Solusi tersebut dilakukan dengan cara melaksanakan pengabdian berupa pemasangan perangkat pengolah biogas untuk Lapas Jember serta sosialisasi dan demonstrasi penggunaan alat. Metode yang dilaksanakan yaitu dengan cara survey, instalasi alat, dan pelaksanaan sosialiasi. Pengabdian ini menghasilkan teknologi tepat menggunakan alat fermentor biogas, dengan bahan baku yang dimasukkan ke dalam fermentor berupa sampah organik, air, dan rumen (kotoran sapi). Uji coba alat fermentor tersebut telah menghasilkan biogas dan dapat disosialisasikan kepada p...
Journal of Biobased Chemicals
Pegagan (Centella asiatica (L.)) is one of the herbaceous plants that grow, and flowers throughou... more Pegagan (Centella asiatica (L.)) is one of the herbaceous plants that grow, and flowers throughout the year. Pegagan has been used for hundreds of years, especially in the dermatology, and cosmetology industries. Pegagan (Centella asiatica (L.)) has distinctive bioactive components, namely triterpene ester glycoside compounds in the form of asiaticoside, and madecoside as well as triterpene group compounds in the form of asiatic acid, and madecasic acid. There are various extraction methods to produce the following compounds namely, conventional extraction methods, and modern extraction methods. The two methods have differences in the results obtained. Therefore, the difference in the extraction method will determine the result of the difference in the levels of a compound. So that this research was carried out on the effect of Pegagan (Centella asiatica (L.)) extraction using a comparison of the Microwave-Assisted Extraction (MAE), and Ultrasound-Assisted Extraction (UAE) methods o...
Journal of Biobased Chemicals
In this research, the extraction of essential oil from fresh basil leaves using solvent-free micr... more In this research, the extraction of essential oil from fresh basil leaves using solvent-free microwave extraction (SFME)and microwave hydrodistillation (MHD) method. Several parameters influence the extraction of basil oil using SFME method: microwave power, the ratio between the mass of raw material with a volume of distiller (F/D), material size, and length of extraction time. Besides, the components contained in basil oil and changes in oil gland conditions in basil leaves before and after being extracted were also evaluated. The optimum condition was obtained as follows: microwave power of 380 W, the ratio between the mass of raw material with a volume of distiller (F/D) of 0.1 g/mL, raw material size of intact (± 3 cm), with an extraction time of 60 min. Moreover, SFME has a shorter extraction time to produce yields than MHD methods. GC-MS analyzed the composition of basil oil, and there were 49 identified components. This study shows that SFME method more effective than the M...
Dedikasi:Jurnal Pengabdian kepada Masyarakat, 2021
Peningkatan jumlah produksi batik memberikan dampak terhadap lingkungan karena limbah cair yang d... more Peningkatan jumlah produksi batik memberikan dampak terhadap lingkungan karena limbah cair yang dihasilkan selama proses pembuatan batik. Penggunaan air dalam proses pembuatan batik rata-rata 25-50 m3 per meter kain. Produksi batik di Indonesia sekitar 500 juta meter per tahun sehingga membutuhkan air 25 juta m3 yang setara dengan kebutuhan air bersih untuk 2500 rumah tangga. Persediaan air bersih tersebut menjadi limbah cair batik dengan volume yang besar, warna yang keruh, dan bau yang menyengat. Limbah cair batik memiliki kandungan pH, Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), dan Total Suspended Solid (TSS) yang tinggi. Solusi yang diberikan untuk mengatasi permasalahan tersebut adalah(1) penyuluhan mengenai kandungan kimia, dampak dan bahaya limbah industri batik terhadap ligkungan dan kehidupan manusia di sekitar kawasan industri, (2) penyuluhan/sosialisasi metode-metode yang dapat diaplikasikan untuk menangani limbah industri batik, (3) Penyuluhan/sosialis...
Journal of Energy Mechanical Material and Manufacturing Engineering, 2020
Glucose is the most abundant monosaccharide in nature, glucose obtained from cellulose and starch... more Glucose is the most abundant monosaccharide in nature, glucose obtained from cellulose and starch, it is many used to degradation process, and for the production of several organic compounds, one of the degradation products of glucose is an HMF (5-hydroxymethylfurfural). HMF is a platform chemical, which can be converted into several chemical and liquid fuels through hydrogenation, oxidation, and esterification. The objective of this researches has studied the kinetics of glucose degradation using acid-catalyzed (H2SO4) in high-temperature liquid water and observe the effect of acid concentration and temperature on degradation of glucose to HMF. In this research was used reactor with pressure 10 atm, with variation time of reaction, sulfuric acid concentration, and temperature of the reaction. From this research found kinetics of glucose degradation was followed by the first-order reaction in each variable. Activation Energy (Ea) values were 7306,593 J/mol; 6341,59 J/mol; 3988,14 J/...
HIGH-ENERGY PROCESSES IN CONDENSED MATTER (HEPCM 2020): Proceedings of the XXVII Conference on High-Energy Processes in Condensed Matter, dedicated to the 90th anniversary of the birth of RI Soloukhin, 2020
Experimental and finite element modeling of partial infill patterns for thermoplastic polymer ext... more Experimental and finite element modeling of partial infill patterns for thermoplastic polymer extrusion 3D printed material using elasto-plastic method
Eksakta : Berkala Ilmiah Bidang MIPA, 2020
This research is to study the effect of ethanol fermentation aerobic pH on acetic acid product. A... more This research is to study the effect of ethanol fermentation aerobic pH on acetic acid product. Anaerobic fermentation uses saccharomyces cerevisiae to produce ethanol, and aerobic fermentation uses acetobacter acetic for acetic acid production. In aerobic ethanol fermentation using pH 3; 3.5; 4 and 5. The ethanol concentration was evaluated using GC ULTRA Scientific Gas Chromatography, DSQ II detector, and MS 220 column. Acetic acid produced was analyzed using an alkalymetric method. Anaerobic fermentation uses Saccharomyces cerevisiae with 1-day log phase, while aerobic fermentation uses acetobacter aceti with a 5-day log phase. Fermentation using saccharomyces cerevisiae within 24 hours so that reduction sugar could stably decrease, optimum ethanol could be got at optimum pH 6 which could decrease 55 % of reducing sugar concentration to produce 8,20583 %v/v ethanol. Fermentation acetate acid content observed in 3 days at pH 6 and 30 ⁰C will produce 6,659 g/l also shows that pH 4...
Materials Science Forum, 2019
Siwalan (Borassus flabellifer L.) is a palm family that is widely planted in the Tuban area of ... more Siwalan (Borassus flabellifer L.) is a palm family that is widely planted in the Tuban area of East Java. Siwalan sap has a relatively high sugar content of about 10-15 g / 100 ml. The sap is obtained by tapping the inflorescences. In general, siwalan sap is used for fresh drinks or alcoholic beverages with maximum storage in 3 days. Based on the sugar content in the sap of siwalan, acetic acid products can be made through fermentation of glucose to ethanol, then the ethanol is fermented into acetic acid. Acetic acid is widely used as a preservative of food and health drinks. The purpose of this research is to study the effect of ethanol fermentation aerobic pH on acetic acid product. Anaerobic fermentation uses saccharomyces cereviceae to produce ethanol, and aerobic fermentation uses acetobacter aceti for acetic acid production. In aerobic ethanol fermentation using pH 3; 3.5; 4 and 5. The concentration of ethanol was analyzed using GC ULTRA Scientific Gas Chromatography, DSQ II...
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
The increase in the culinary industry certainly must be balanced with the packaging waste generat... more The increase in the culinary industry certainly must be balanced with the packaging waste generated. The waste from aluminum foil is one of the wastes produced. Over 8 tons of aluminum foil waste are generated each month in East Java. Waste that has been piled up is only given to third parties. It takes about 400 years for aluminum foil to breakdown and decompose in the soil. Aluminum foil waste can generate environmental pollution. As waste pollution increases, alternatives are needed to convert waste into use ful materials. Aluminum foil can be utilized as a raw material for the production of potassium aluminum sulfate due to its high aluminum content. The objective of this study is to utilize aluminum waste into potassium aluminum sulfate. The concentrations of KOH and H2SO4 are the two variables combined. In this study, the yield value, pH analysis, melting point, and Al 2O3 content of alum will be determined. The results showed that 2 M KOH and 4.5 M H2SO4 had the highest yield...
Jurnal Teknik Kimia dan Lingkungan
Beluntas (Pluchea Indica L.) which commonly used as astringent and antipyretic has a high potenti... more Beluntas (Pluchea Indica L.) which commonly used as astringent and antipyretic has a high potential for the feedstock of essential oil production. The objective of this work is to optimize solvent-free microwave extraction (SFME) of Beluntas leaves by using response surface methodology (RSM). Box-Behnken Design with the variations of extraction time (60-120 min), feed/distiller ratio (0.06-0.1 g/ml), and heating power (150-450 W) was utilized to optimize essential oil yield. The feed/distiller ratio factor had the highest significant effect on the essential oil yield (P<0.05). Essential oil yield increased as the increase of oil heating power and time extraction, and vice versa. On the other hand, the increase in the feed/distiller ratio gave a negative impact on the essential oil yield. The maximum essential oil yield using SFME method of 0.2728 b/b% was obtained for the optimized condition of extraction time of 90 min, microwave heating power of 450 W, and feed/distiller ratio ...
Journal of Biobased Chemicals
Bioethanol is a form of renewable energy that is used to reduce dependence on the use of fossil f... more Bioethanol is a form of renewable energy that is used to reduce dependence on the use of fossil fuels which cause various negative impacts on the environment. Ulva sp. contains high carbohydrates so it has the potential as a raw material for bioethanol production. This study aims to determine the optimum conditions of the fermentation process with the variables used time, pH, and yeast concentration. This study used the results of hydrolysis of Ulva sp. with optimum operating conditions of 0.1 N HCl concentration, 80 mesh particle size, and 450 watt microwave power. Measurement of bioethanol levels was carried out using an alcoholmeter. The results showed that the optimal conditions for fermentation were 7 days of fermentation, pH 5.5, and yeast concentration of 1.5% which resulted in a bioethanol content of 7.55%.
Journal of Biobased Chemicals
The Pegagan plant has a scientific name in the form of Centella asiatica L. which is included in ... more The Pegagan plant has a scientific name in the form of Centella asiatica L. which is included in the Centella genus, Apiaceae family, and kingdom Plantae. Pegagan (Centella asiatica L.) has distinctive bioactive components, namely triterpene ester glycoside compounds in the form of asiaticoside and madecassoside, and triterpene group compounds in the form of Asiatic acid and madecassic acid. In this study, the extraction of bioactive components from pegagan was carried out using the Microwave-Assisted Extraction (MAE) method and will study the effect of ethanol solvent concentration in the extraction of bioactive compounds. Analysis of the extracted bioactive content was carried out by analyzing the total phenol content using the Folin-Ciocalteau reagent and ANOVA analysis. The results obtained from the study were in the form of total phenol content as an indication of the presence of bioactive compounds, namely at operating conditions of 450 watts of power, 50% ethanol concentratio...
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Ampas tebu merupakan suatu limbah atau residu dari proses penggilingan tebu yang telah diambil ni... more Ampas tebu merupakan suatu limbah atau residu dari proses penggilingan tebu yang telah diambil niranya. Ketersediaan ampas tebu berdasarkan data dari P3GI sekitar 2991 juta ton pertahun. Sedangkan ampas tebu dari PG Madukismo Yogyakarta menghasilkan sekitar 1400 ton perhari. Salah satu pemanfaatan ampas tebu yaitu digunakan sebagai bahan baku pembuatan karbon aktif. Adsorben karbon aktif berbahan baku biomassa seperti ampas tebu dapat digunakan sebagai adsorben untuk penyerapan limbah cair, zat warna, dan juga logam berat. Tujuan dari penelitian ini yaitu pemanfaatan limbah ampas tebu untuk dijadikan karbon aktif dengan aktivasi secara kimia. Proses aktivasi secara kimia dalam penelitian menggunakan ZnCl2. Penggunaan ZnCl2 dikarenakan dapat meningkatkan permukaan pori, dapat menghambat pelepasan tar selama karbonasi dan mendukung reaksi kondensasi. Metode penelitian yang digunakan yaitu dengan proses perendaman karbon dalam larutan ZnCl2 dengan konsentrasi 10%, 30%, dan 50% selama 2...
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Kulit hewan secara alami mengandung berbagai macam tipe mikroorganisme. Mikroorganisme yang terda... more Kulit hewan secara alami mengandung berbagai macam tipe mikroorganisme. Mikroorganisme yang terdapat pada kulit hewan mampu berkembang biak dengan cepat dikarenakan pada kulit hewan terdapat sumber nutrisi, berkadar air tinggi, pH dan suhu yang sesuai di lingkungan penyamakan. Kulit awetan di gudang penyimpanan kulit Politeknik ATK yang menumpuk akibat Pandemi Covid-19 menjadi masalah yang belum terselesaikan. Pemanfaatan kulit awetan yang menumpuk dengan cara mengisolasi bakteri yang terdapat pada kulit tersebut. Salah satu bakteri yang terdapat pada kulit yaitu bakteri proteolitik, dimana bakteri proteolitik dapat menghasilkan enzime protease. Enzim protease mempunyai peranan penting dalam proses penyamakan kulit yang ramah lingkungan. Tujuan dari penelitian ini yaitu mengisolasi bakteri proteolitik penghasil enzim protease dari tumpukan kulit sapi, kambing dan domba yang telah tersimpan dengan metode penggaraman selama satu tahun di gudang penyimpanan Politeknik ATK Yogyakarta. P...
Sewagati
Kabupaten Jember memiliki Lembaga Pemasyarakatan (Lapas) klas II A yang berlokasi di tengah kota ... more Kabupaten Jember memiliki Lembaga Pemasyarakatan (Lapas) klas II A yang berlokasi di tengah kota Jember. Sampah yang dihasilkan di Lapas cukup banyak. Jumlah sampah yang dihasilkan semakin meningkat seiring dengan meningkatnya jumlah penghuni Lapas. Namun, jika sampah yang ada tidak dimanfaatkan dengan baik akan langsung mencemari lingkungan. Solusi yang ditawarkan pada kegiatan ini adalah mendapatkan sumber energi baru agar lebih ekonomis. Solusi tersebut dilakukan dengan cara melaksanakan pengabdian berupa pemasangan perangkat pengolah biogas untuk Lapas Jember serta sosialisasi dan demonstrasi penggunaan alat. Metode yang dilaksanakan yaitu dengan cara survey, instalasi alat, dan pelaksanaan sosialiasi. Pengabdian ini menghasilkan teknologi tepat menggunakan alat fermentor biogas, dengan bahan baku yang dimasukkan ke dalam fermentor berupa sampah organik, air, dan rumen (kotoran sapi). Uji coba alat fermentor tersebut telah menghasilkan biogas dan dapat disosialisasikan kepada p...
Journal of Biobased Chemicals
Pegagan (Centella asiatica (L.)) is one of the herbaceous plants that grow, and flowers throughou... more Pegagan (Centella asiatica (L.)) is one of the herbaceous plants that grow, and flowers throughout the year. Pegagan has been used for hundreds of years, especially in the dermatology, and cosmetology industries. Pegagan (Centella asiatica (L.)) has distinctive bioactive components, namely triterpene ester glycoside compounds in the form of asiaticoside, and madecoside as well as triterpene group compounds in the form of asiatic acid, and madecasic acid. There are various extraction methods to produce the following compounds namely, conventional extraction methods, and modern extraction methods. The two methods have differences in the results obtained. Therefore, the difference in the extraction method will determine the result of the difference in the levels of a compound. So that this research was carried out on the effect of Pegagan (Centella asiatica (L.)) extraction using a comparison of the Microwave-Assisted Extraction (MAE), and Ultrasound-Assisted Extraction (UAE) methods o...
Journal of Biobased Chemicals
In this research, the extraction of essential oil from fresh basil leaves using solvent-free micr... more In this research, the extraction of essential oil from fresh basil leaves using solvent-free microwave extraction (SFME)and microwave hydrodistillation (MHD) method. Several parameters influence the extraction of basil oil using SFME method: microwave power, the ratio between the mass of raw material with a volume of distiller (F/D), material size, and length of extraction time. Besides, the components contained in basil oil and changes in oil gland conditions in basil leaves before and after being extracted were also evaluated. The optimum condition was obtained as follows: microwave power of 380 W, the ratio between the mass of raw material with a volume of distiller (F/D) of 0.1 g/mL, raw material size of intact (± 3 cm), with an extraction time of 60 min. Moreover, SFME has a shorter extraction time to produce yields than MHD methods. GC-MS analyzed the composition of basil oil, and there were 49 identified components. This study shows that SFME method more effective than the M...
Dedikasi:Jurnal Pengabdian kepada Masyarakat, 2021
Peningkatan jumlah produksi batik memberikan dampak terhadap lingkungan karena limbah cair yang d... more Peningkatan jumlah produksi batik memberikan dampak terhadap lingkungan karena limbah cair yang dihasilkan selama proses pembuatan batik. Penggunaan air dalam proses pembuatan batik rata-rata 25-50 m3 per meter kain. Produksi batik di Indonesia sekitar 500 juta meter per tahun sehingga membutuhkan air 25 juta m3 yang setara dengan kebutuhan air bersih untuk 2500 rumah tangga. Persediaan air bersih tersebut menjadi limbah cair batik dengan volume yang besar, warna yang keruh, dan bau yang menyengat. Limbah cair batik memiliki kandungan pH, Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), dan Total Suspended Solid (TSS) yang tinggi. Solusi yang diberikan untuk mengatasi permasalahan tersebut adalah(1) penyuluhan mengenai kandungan kimia, dampak dan bahaya limbah industri batik terhadap ligkungan dan kehidupan manusia di sekitar kawasan industri, (2) penyuluhan/sosialisasi metode-metode yang dapat diaplikasikan untuk menangani limbah industri batik, (3) Penyuluhan/sosialis...
Journal of Energy Mechanical Material and Manufacturing Engineering, 2020
Glucose is the most abundant monosaccharide in nature, glucose obtained from cellulose and starch... more Glucose is the most abundant monosaccharide in nature, glucose obtained from cellulose and starch, it is many used to degradation process, and for the production of several organic compounds, one of the degradation products of glucose is an HMF (5-hydroxymethylfurfural). HMF is a platform chemical, which can be converted into several chemical and liquid fuels through hydrogenation, oxidation, and esterification. The objective of this researches has studied the kinetics of glucose degradation using acid-catalyzed (H2SO4) in high-temperature liquid water and observe the effect of acid concentration and temperature on degradation of glucose to HMF. In this research was used reactor with pressure 10 atm, with variation time of reaction, sulfuric acid concentration, and temperature of the reaction. From this research found kinetics of glucose degradation was followed by the first-order reaction in each variable. Activation Energy (Ea) values were 7306,593 J/mol; 6341,59 J/mol; 3988,14 J/...
HIGH-ENERGY PROCESSES IN CONDENSED MATTER (HEPCM 2020): Proceedings of the XXVII Conference on High-Energy Processes in Condensed Matter, dedicated to the 90th anniversary of the birth of RI Soloukhin, 2020
Experimental and finite element modeling of partial infill patterns for thermoplastic polymer ext... more Experimental and finite element modeling of partial infill patterns for thermoplastic polymer extrusion 3D printed material using elasto-plastic method
Eksakta : Berkala Ilmiah Bidang MIPA, 2020
This research is to study the effect of ethanol fermentation aerobic pH on acetic acid product. A... more This research is to study the effect of ethanol fermentation aerobic pH on acetic acid product. Anaerobic fermentation uses saccharomyces cerevisiae to produce ethanol, and aerobic fermentation uses acetobacter acetic for acetic acid production. In aerobic ethanol fermentation using pH 3; 3.5; 4 and 5. The ethanol concentration was evaluated using GC ULTRA Scientific Gas Chromatography, DSQ II detector, and MS 220 column. Acetic acid produced was analyzed using an alkalymetric method. Anaerobic fermentation uses Saccharomyces cerevisiae with 1-day log phase, while aerobic fermentation uses acetobacter aceti with a 5-day log phase. Fermentation using saccharomyces cerevisiae within 24 hours so that reduction sugar could stably decrease, optimum ethanol could be got at optimum pH 6 which could decrease 55 % of reducing sugar concentration to produce 8,20583 %v/v ethanol. Fermentation acetate acid content observed in 3 days at pH 6 and 30 ⁰C will produce 6,659 g/l also shows that pH 4...
Materials Science Forum, 2019
Siwalan (Borassus flabellifer L.) is a palm family that is widely planted in the Tuban area of ... more Siwalan (Borassus flabellifer L.) is a palm family that is widely planted in the Tuban area of East Java. Siwalan sap has a relatively high sugar content of about 10-15 g / 100 ml. The sap is obtained by tapping the inflorescences. In general, siwalan sap is used for fresh drinks or alcoholic beverages with maximum storage in 3 days. Based on the sugar content in the sap of siwalan, acetic acid products can be made through fermentation of glucose to ethanol, then the ethanol is fermented into acetic acid. Acetic acid is widely used as a preservative of food and health drinks. The purpose of this research is to study the effect of ethanol fermentation aerobic pH on acetic acid product. Anaerobic fermentation uses saccharomyces cereviceae to produce ethanol, and aerobic fermentation uses acetobacter aceti for acetic acid production. In aerobic ethanol fermentation using pH 3; 3.5; 4 and 5. The concentration of ethanol was analyzed using GC ULTRA Scientific Gas Chromatography, DSQ II...
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
The increase in the culinary industry certainly must be balanced with the packaging waste generat... more The increase in the culinary industry certainly must be balanced with the packaging waste generated. The waste from aluminum foil is one of the wastes produced. Over 8 tons of aluminum foil waste are generated each month in East Java. Waste that has been piled up is only given to third parties. It takes about 400 years for aluminum foil to breakdown and decompose in the soil. Aluminum foil waste can generate environmental pollution. As waste pollution increases, alternatives are needed to convert waste into use ful materials. Aluminum foil can be utilized as a raw material for the production of potassium aluminum sulfate due to its high aluminum content. The objective of this study is to utilize aluminum waste into potassium aluminum sulfate. The concentrations of KOH and H2SO4 are the two variables combined. In this study, the yield value, pH analysis, melting point, and Al 2O3 content of alum will be determined. The results showed that 2 M KOH and 4.5 M H2SO4 had the highest yield...