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All Journal EKSAKTA: Journal of Sciences and Data Analysis Jurnal Sains Materi Indonesia Jurnal Bahan Alam Terbarukan Jurnal Sumberdaya Alam dan Lingkungan Journal of Applied Information, Communication and Technology (JAICT) Jurnal Penelitian Pendidikan IPA (JPPIPA) Civil Engineering Journal Indonesian Journal of Chemistry Jurnal Inovator Jurnal Ilmiah Mandala Education (JIME) Jurnal Teknik Kimia ASEAN Journal of Chemical Engineering Kinetika Jurnal Pendidikan dan Teknologi Indonesia Jurnal Pengabdian Masyarakat Indonesia AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) International Journal of Research in Vocational Studies (IJRVOCAS) Chemical Engineering Journal Storage (CEJS) Makara Journal of Science Makara Journal of Technology ENGAGEMENT: Jurnal Pengabdian Masyarakat Innovative: Journal Of Social Science Research Riwayat: Educational Journal of History and Humanities Serambi Engineering Jurnal Sains Materi Indonesia Jurnal Teknologi Riset Terapan
Abu Hasan
Chemical Engineering Department-State Polytechnic Of Sriwijaya Jl. Srijaya Negara Bukit Besar, Palembang 30139, Indonesia
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts 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 Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Social Sciences Other

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STUDI KASUS PENGARUH WAKTU DAN LAJU ALIR PADA PROSES REGENERASI MOLSIEVE MELALUI PEMANASAN PADA KILANG EKSTRAKSI NGL DI PT.PERTA-SAMTAN GAS Haidi Tazaruddin; Fadarina HC; Abu Hasan
KINETIKA Vol. 13 No. 02 (2022): KINETIKA 01072022
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Molsieve adsorption plant which adsorp moisture content in feed gas until H2O below 0.1 ppmv at outlet vessel. After adsorption process, molsieve will saturated and need to regenerate for return molsieve capacity. Regeneration process are very important for adsorption capacity. Problem at extraction plant prabumulih is molsieve capacity will decrease after 3 month. Based of things that affect molsieve capacity, need to evaluate optimal regeneration as a maximum equipment limit. Meassurement parameter in this research is quantitiy of H2O not boiled or remain in molsieve, with heating time variable 3.5 hour , 4.0 hour, 4.5 hour, and 5.0 hour. Combined with flow rate variable 14.0 MMscfd, 14.5 MMscfd, 15.0 MMscfd, 15.5 MMscfd. Result in combination flow rate 15.5 MMscfd with heating time 5.0 hour have a mass H2O to boil up is 1.39387 ton and mass H2O remain in molsiev is 0.08019 ton. The writter found in flow rate 15.0 with heating time 5.0 hour is optimal combination based on equipment limitation. Writter suggest for replace equipment for raise up flow rate to maximal regeneration.
Hydrolysis profile of gadung (dioscorea hispida dennst) starch to glucose using alpha amylase enzyme Utari Agustina; Abu Hasan; Indah Purnamasari
Jurnal Teknik Kimia Vol 30 No 1 (2024): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya in collaboration with Asosiasi Pendidikan Tinggi Teknik Kimia Indonesia (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jtk.v30i1.1162

Abstract

Indonesia is an agrarian Country that has abundant natural resources. It has potential to be used as industrial raw materials such as sugar reduction from starch. Gadung, which is abundant in Gandus and it can be monitored for its presence in the dry season, is one source of starch. The aims of this research is to obtain glucose with a high yield percentage, to know the optimum concentration of α-amylase enzyme to hydrolysis gadung starch into glucose, and to know the relationship between hydrolysis time and concentration the glucose formed by the addition of the enzyme variation. The implementation of the research is carried out in three stages, first is preparation of raw materials, hydrolysis of gadung starch into glucose enzymatically, and analysis of glucose level using the UV-Vis spectrophotometry with Nelson reaction. The free variables used are the time variation of hydrolysis 0, 10, 20, 30, 40, 50 minutes and alpha amylase enzyme 1 %, 2 %, 3 % b/v. The optimum hydrolysis results on this study were at 1 % b/v enzyme variation, 10 minutes hydrolysis time, and a temperature of 90 oC. The yield of glucose concentration is 255.35 ppm. From this reseach, it is known that the longer the starch hydrolysis takes place, the observed glucose tends to experience in fluctuative consentration caused by the increase of α- amylase enzyme variations.
CO2 and H2S Absorption in Tofu Liquid Waste Biogas using Packed Bed Scrubber with Variation of MEA Concentration and Flow Rate Putra, Aan Ade; Kalsum, Leila; Hasan, Abu
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 3 No. 2 (2023): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v3i2.204

Abstract

Biogas technology has become an alternative fuel that is often used in Indonesia. One of the raw materials for biogas that has the potential and is easy to obtain is waste from the tofu industry. Liquid waste still contains a lot of organic elements. The organic materials contained in the exhaust of the tofu industry are generally very high. The gases commonly found in tofu waste are nitrogen gas (N2), oxygen (O2), hydrogen sulfide (H2S), ammonia (NH3), carbon dioxide (CO2) and methane (CH4). These gases come from the decomposition of organic materials contained in wastewater. So that biogas produced from tofu liquid waste still contains CO2 and H2S gases which are quite high. Therefore, in this study the process of purification or refining of biogas products will be carried out using the absorption method through an absorber column using monoethanolamine (MEA) solution as a chemical absorbent through a 8 mm packed bed scrubber. The results showed that the best biogas flow rate in the purification process which produced the highest CH4 concentration of 95.12% was 40% MEA concentration and 0.8 L/min flow rate. The effect of MEA concentration on biogas purification causes the concentration of CO2 and H2S in the purified biogas to decrease as the MEA concentration increases. The best combination of 0.8 L/min biogas flow rate and 10 mm packing area reduces CO2 and H2S concentrations to 1.88% and 0 ppm.
Combine Improvement for Dye-Sensitized Solar Cells: Characterization of Metal Oxide-Doped TiO2 Nanoparticles Integrated with Clitoria Ternatea Extract Ronaldo; Rusdianasari; Hasan, Abu
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 2 (2024): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i2.292

Abstract

Dye Sensitized-Solar Cells (DSSC) represent a third-generation solar cell technology based on photoelectrochemical principles. This study explores the use of Clitoria ternatea (butterfly pea) extract as an organic dye for DSSCs, focusing on its ability to absorb sunlight effectively. Excitation of electrons triggered by light in photocatalysis is strongly influenced by the position of the band gap. To be effective as a photocatalyst, the material must have a conduction band with a high positive potential compared to the electron accepting potential. Doping metal oxides such as CuO, MgO, Fe2O3, and ZnO into TiO2 can change the band edge properties or surface states which can increase light absorption. This research presents the synthesis of TiO2 nanoparticles as photoanodes doped using metal oxides to evaluate characteristic that can influence DSSC performance. TiO2 nanoparticles doped with metal oxide were synthesized using the solvothermal method and characterized by XRD, SEM-EDX, FTIR, and UV-Vis. Comprehensive analysis of samples doped with metal oxides significantly affects the crystal structure, morphology, elemental composition, and optical properties of the material. The results showed that Cu-doped TiO2 samples allowed for the most significant performance improvement in DSSC, followed by Fe-doped TiO2, Mg-doped TiO2, and Zn-doped TiO2, with pure TiO2 having the lowest performance potential. These results provide important insights into material optimization to improve DSSC efficiency.
The Effects of Raw Material Ratio and Calorific Value on Gasification Rate from Co-Gasification of Coal and Biomass (Bagasse) Kurniansyah, Muhammad Harry; Hasan, Abu; Syari, Aida
Jurnal Bahan Alam Terbarukan Vol 12, No 2 (2023): December 2023 [Nationally Accredited Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v12i2.44257

Abstract

To reduce greenhouse gas pollution by 29% in 2030 and actively fight climate change, Indonesia uses biomass as an alternative energy which can be combined with coal. Bagasse is a relatively abundant biomass that has not been effectively utilized. Bagasse can be used as a more effective alternative energy source if it is processed with co-gasification, which is the conversion of solid fuel into gas from two different fuel materials at the same time to produce syngas. The characteristics of biomass and coal co-gasification are closely linked to reactor type and gasification parameters such as temperature, gasifying agent, and mass ratio. The composition of the produced syngas changes depending on the calorific value of the coal used and the raw material ratio. The amount of syngas produced rises in direct proportion to the amount of biomass, and the quantity of air supplied causes complete combustion, so the syngas content decreases. The impact of the calorific value of the coal used, as well as variations in the ratio of the composition of coal and bagasse, on the supply of oxygen in downdraft type gasification equipment is investigated in this study. Bagasse characteristics identified by proximate and ultimate analysis indicate that this biomass can be used as an alternative source of renewable energy. The co-gasification process with 100% coal raw material has the highest temperature and the longest time; the co-gasification process with 100% sugarcane bagasse raw material has the lowest temperature and the shortest time; and the duration of the flame produced in syngas ranges from 5-6 minutes. The 25% bagasse and 75% coal ratio provided the fastest high temperature in this testing, making it more efficient. The calorific value of coal and biomass determines combustion efficiency, with 5300 cal/gr coal producing heat that lasts longer than 3800 cal/gr and 4500 cal/gr.
Physical Properties Investigations of Natural Rubber Composites Using Cetyltrimethylammonium Bromide (CTAB) as Modifier of Local Clay Filler Hasan, Abu; Junaidi, Robert; Yerizam, Muhammad; Arifin, Fatahul
ASEAN Journal of Chemical Engineering Vol 23, No 3 (2023)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.80712

Abstract

Improved absorption of rubber backbone on filler surfaces is necessary to enhance the physical properties of rubber vulcanizate. One of the ways to repair the surface of the filler is through modifying using surfactant. Hence, this study aims to compare the physical properties of natural rubber vulcanizates using clay filler and modified clay with cetyltrimethylammonium bromide (CTAB). The processes that were followed to achieve the objectives of this research were the design of rubber formulas, mastication and milling of rubber, and testing of the physical properties of rubber vulcanization. The clay characterization and its modification using FTIR and XRD were also carried out. Characterization using FTIR and XRD showed that there was indeed a clay modification with CTAB. Natural rubber compounds were also analyzed using SEM. The torque on the rheometer for modified clay with CTAB is 12.34 kg-cm higher than for original clay, which is 7.05 kg-cm. Elongation at break and tensile strength for vulcanizate using CTAB-modified clay filler is lower than that using original clay, with 300% modulus and hardness increase. Thus, clay modification using CTAB as a filler has a good effect on the curing characteristics and physical properties of natural rubber vulcanization compared to only using local clay as a filler.
Examining the Intersectional Experiences of Ethnic Minority Women Within the Gendered Paradigm of Educational Institutions: A Case Study of Rajshahi University Moniruzzaman; Hasan, Abu
ENGAGEMENT: Jurnal Pengabdian Masyarakat Vol. 3 No. 3 (2024): Community Empowerment and Services
Publisher : Perkumpulan Dosen Fakultas Agama Islam Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58355/engagement.v3i3.88

Abstract

This study aims to explore how ethnic minority women are facing discrimination at Rajshahi University. The research methodology involved the use of a qualitative case study design, which employed interviews to collect data from a sample of 17 undergraduate ethnic minority women at Rajshahi University. The study aimed to identify the influence of discriminatory outlook towards ethnic minority women in their academic experiences. There are significant biases against ethnic minority women in their academic experiences. The implications of this research highlight the need for increased attention to gender dynamics about ethnic minorities in society and the importance of creating more inclusive and equitable learning environments for all in society so that no one is facing discrimination based on their ethnic identity as well as gender status. This study contributes to the literature on gender and education by providing insight into the experiences of ethnic minority women and offering recommendations for authorities to promote a more equitable environment that eradicates the problems indicated in this research.
Increasing the Photochemical Performance of Dye-Sensitized Solar Cell: The Effect of Mixed Dye from Areca Catechu and Tectona Grandis Extract Ahmad, Ali; Hasan, Abu; Bow, Yohandri
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 3 (2024): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i3.301

Abstract

Dye Sensitized-Solar Cells (DSSC) represent a solar cell technology belonging to the third generation, functioning on the principles of the photoelectrochemical concept. The utilization of teak leaves (Tectona Grandis) and areca nut (Areca Catechu) as an organic dye in DSSC is accountable for the absorption of solar radiation. The stimulation of electrons induced by light in photocatalysis is greatly impacted by the band gap's specific location. For a material to act efficiently as a photocatalyst, it must possess a conduction band exhibiting a notably high positive potential in comparison to the potential of electron acceptance. The mixed of dye from teak leaves and areca nut increasing the absorption of the sunlight, thereby enhancing light absorption. The current study details the Mixing of areca nut and teak leaves extract to enhance the photochemical performance of DSSC and subsequently examined via FTIR, and UV-Vis analyses. A thorough examination of samples from mixed dye significantly impacts the elemental composition, and optical characteristics of the substance. The outcomes revealed that mixed dye from areca nut and teak leaves exhibited the most notable enhancement in DSSC efficiency, followed by teak leaves dye, whereas the areca nut dye demonstrated least performance potential. These findings offer valuable insights towards optimizing dye to boost the efficiency of DSSC.
Design of VHF Directional Antenna on Class B Automatic Identification System (AIS) for Vessel Traffic Monitoring Supriyanto, Eko; Hasan, Abu; Bramantyo, Hutama Arif; Nurrani, Hanny
JAICT Vol. 8 No. 2 (2023)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jaict.v8i2.5017

Abstract

The majority of Automatic Identification System (AIS) equipment used on ships, harbormasters, and monitoring stations utilizes antennas that possess an omnidirectional beam pattern, covering all directions in a 360-degree range. One limitation inherent to omnidirectional antennas is their susceptibility to signal dispersion, resulting in suboptimal signal gain in certain directions. In the context of using omnidirectional antennas at Port AIS stations or other Monitoring Stations situated in expansive terrestrial regions, it is observed that the monitoring range is reduced. The objective of this study is to develop a prototype of a directional antenna capable of enhancing the monitoring range of ship traffic monitoring stations in alignment with the specific direction requested by land-based monitoring stations. The approach  being utilized  is the prototype method. This methodology encompasses the sequential steps of data collection, material and issue identification, planning, modeling, building, testing, and implementation.
Classification System of Crystal Guava (Psidium Guajava) Using Convolutional Neural Network And Rectrified Linear Unit Method Based on Android Wiktasari, Wiktasari; Yudantoro, Tri Raharjo; Alifiansyah, Muhammad Fikry; Kurnianingsih, Kurnianingsih; Triyono, Liliek; Hasan, Abu
JAICT Vol. 10 No. 1 (2025)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jaict.v10i1.6170

Abstract

These instructions Abstract - However, determining the ripeness of fruit is frequently done by hand, which presents problems with consistency and efficiency. In order to improve the sorting of crystal guava fruit maturity, this study suggests combining machine learning technology with the creation of digital image-based apps. Fruit ripeness is classified using a convolutional neural network (CNN), a deep learning model, based on the color of its skin. It is anticipated that the method will increase productivity and offer superior precision while sorting crystal guava fruit. The System Development Life Cycle (SDLC) with a Waterfall approach is the methodology employed. The system design formed from the deep learning model resulted in excellent performance in classifying images of crystal guava fruit by utilizing model training from the base models ResNet50V2, DenseNet121, NASNetMobile, and MobileNetV2 with a combination of training using K-fold cross-validation with a 5-fold configuration. The best-trained model achieved an average highest accuracy of 99.92% in model training using MobileNetV2 with the lowest average loss value of 0.0088. The system application was developed using mobile Android, leveraging the Flutter framework and Dart programming language. The research results demonstrate a comparison of testing on crystal guava and local guava fruits against ripeness classification parameters
Co-Authors A.S, Putu Yoga Ahmed, Shameem Ahsan, Raquib Aida Syarif Albari, Mauris Ali Ahmad Alifiansyah, Muhammad Fikry Amanah, Tria Rizki Anerasari Meydinariasty Apriantoro, Roni Apriyansah Apriyansah, Apriyansah Arif Bramantyo, Hutama Arifin, Moh Samsul Arza, Tasya Dwi Putri Candra Aprizal Didiek Hari Nugroho Eko Supriyanto Erwana Dewi Fadarina HC Farhan, Ismy Fatahul Arifin, Fatahul Fauzi, Pebi Dian Ghafur, Abd. Haidi Tazaruddin Haliman, Annisa Cendani Hary Sulistyo Hary Sulistyo Hary Sulistyo Hasan, Jordan Hutama Arif Bramantyo INDAH PURNAMASARI Indah Purnamasari Indah Purnamasari Indriani Indriani Irawan, Dewanda Jamil, Maizun Binti Kalsum, Leila Kurnianingsih Kurnianingsih, Kurnianingsih Kurniansyah, Muhammad Harry Kusuma, Mutmainnah Ningtyas Luqita, Syauqi Fajar M. Mar’ie Rizqi Ganisha Martha Aznury Martha Aznury Moniruzzaman Muhammad Yerizam Muhammad Zaman Mustain Mustain Nor, Siti Najdah Binti Mohd Nurrani, Hanny Octhaviana, Vivi Oktaviani, Cantika Cakhya Pramudya, Nabila Salwa Pramuji, Tulus Putra, Aan Ade Putra, Asri Eka Putri, Nabilah Ayunisa Rafit Arjeni Rahmaniar Rahmaniar Rahmaniar, Rahmaniar RD Kusumanto Risdzuan, Aiman Arif Bin Robert Junaidi Robert Junaidi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmanto, Raditya Artha Rochmatika, Rizkha Rochmatika, Rizkha Ajeng Ronaldo Rozi, Fathor Rusdianasari Rusdianasari Samosir, Devina Sanchia Sardewi, Tri Selastia Yuliati Selastia, Selastia Selly Ratna Sari Sindung HW Sasono, Sindung HW Slamet Widodo Suharto Honggokusumo Suharto Honggokusumo Suharto Honggokusumo Suharto Honggokusumo Suharto Honggokusumo Syamsul Hidayat, Sidiq Syari, Aida Syaritri, Dwi Thomas Agung Setyawan, Thomas Agung Tri Raharjo Yudantoro Triyono, Liliek Utari Agustina Wahyu Wulandari Wijaya, Satria Agung Wiktasari Wiktasari, Wiktasari Yahya, Muhammad Habib Yohandri Bow Yuliani, Aliyah Yuliati - Yuniar Zaman, Muhammad Zikri, Ahmad