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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Journal of Natural Sciences and Mathematics Research CHEESA: Chemical Engineering Research Articles Walisongo Journal of Chemistry Jurnal Energi Baru dan Terbarukan Jurnal Rekayasa Proses Digital Learning, Social Science, and Life-course Studies
Ramandani, Adityas Agung
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Physics Social Sciences

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Optimization and Characterization of Adsorbent from Palm Kernel Shell Waste Using H3PO4 Activator Herlambang, M. Julian; Ramandani, Adityas Agung; Cendekia, Devy; Alvita, Livia Rhea; Wulandari, Yeni Ria; Shintawati, Shintawati; Purnani, Mawar Siti; Efendi, Dimas Amirul Mukminin Nur
CHEESA: Chemical Engineering Research Articles Vol. 6 No. 2 (2023)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v6i2.15906.118-125

Abstract

Palm kernel shell is solid waste produced from the processing of crude palm oil (CPO). In this context, phosphoric acid (H3PO4) serves as an essential activator for producing an adsorbent with maximum micropore under operating conditions at a temperature of <450oC. Therefore, this study aimed to determine the optimal adsorbent condition of the palm kernel shell using H3PO4activator. The production process was optimized using Response Surface Methodology (RSM) and Central Composite Design (CCD) methods with activator concentration variations of 4%, 5%, and 6%, at activation times of 23 hours, 24 hours, and 25 hours, respectively. The quality of the adsorbent produced fulfilled SNI standard 06-3730-1995, characterized by water content of 1.001%, ash content of 5.767%, missing substance level of 18.932%, and fixed carbon content of 75.301%. Furthermore, this work effectively optimized the RSM and CCD adsorbent production process, achieving 4.785% variation in activator concentration and 24.679 hours activation time.
Characteristics of Liquid Sugar from Cassava Flour Using Gelatinization, Liquefaction and Enzymatic Saccharification (amyloglucosidase and α-amylase) Processes Agustina, Tika; Elsyana, Vida; Alvita, Livia Rhea; Ramandani, Adityas Agung; Purnani, Mawar Siti
Walisongo Journal of Chemistry Vol 7, No 1 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i1.20458

Abstract

Domestic sugar production is still insufficient to satisfy the national demand for sugar, and production costs are expensive. One of the ingredients that can be used to make liquid sugar is starch. This study aims to determine the response of the resulting reduced sugar by optimizing the substrate concentration, liquefaction, and saccharification time. The method used of Box Behnken Design (BBD) with combinations of 20, 30, and 40% substrate concentrations, liquefaction times of 20, 40, and 60 min, and saccharification times of 20, 40, and 60 min. The characteristics of cassava flour, such as moisture (9.208 ± 0.068%), ash (0.987 ± 0.001%), fiber (2.187 ± 0.033%), and starch (79.876 ± 0.000%), were satisfied on SNI 01-2905-1992. Liquid sugar made from cassava flour reduced the sugar content by 28.299 ± 0.101%. The optimal conditions were 40% substrate concentration, 60 min liquefaction time, and 60 min saccharification time. The characteristics of the validation liquid sugar are in accordance with the specifications for the quality requirements of SNI 01-2978-1992 in the form of moisture content, ash content, and reducing sugar of 5.194 ± 0.003%, 0.996 ± 0.000%, and 29.668 ± 0.761%, respectively. These results highlight the effectiveness of optimizing substrate concentration, liquefaction time, and saccharification time in producing high-quality liquid sugar from cassava flour. This optimization addresses the domestic demand for sugar. It provides a cost-effective solution by utilizing cassava flour, thereby supporting the local agricultural economy and potentially reducing reliance on imported sugar.
Modification Reactor Biogas With Isolation Water And Scrubber To Increase Biomethane Production Afifah, Meita; Prihatini, Chindy Aulia; Syamsuri, Iyappateya Gelegar Dirgantara; Didik, Nurjan; Elsyana, Vida; Ramandani, Adityas Agung
Jurnal Energi Baru dan Terbarukan Vol 5, No 2 (2024): Juli 2024
Publisher : Program Studi Magister Energi, Sekolah Pascasarjana, Universitas Diponegoro, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jebt.2024.23027

Abstract

Biogas is alternative energy produced through the process of fermenting organic materials in anaerobic conditions to produce methane gas (CH4). The quality of the biogas depends on the concentration of the CH4, the higher the content, the better the quality. One way to improve the quality of biogas so that the content of methane gases in biogases increases and can reduce gases such as CO2, H2S, and other gases is by using a scrubber that contains compound fertilizer as its purification. The objective of this research is to reuse organic waste into useful biogas as alternative energy, and to apply water as a methane gas isolator so as not to be wasted on batch and scrubber reactor processes for the purification of H2S content. The old test results of the biogas flame and the color test of the flame on the 20th and 28th days could not be done, because of the little gas formed to the pressure of the gas generated 0 atm. On the 40th day where the gas pressure generated 5 atm, but the results of the biogas fire test did not come out because the gas produced was still small so the flow of gas to the stove did not reach. Biogas production needs to be increased so that the long-standing test of flame and flame color of biogas can be done well. This research also was explored step by step to producing biogas using organic waste. In addition, consideration should be given to the use of other methods to increase gas production so that these alternative energy applications can run optimally.
Pemanfaatan Lignin Serai Wangi Sebagai Lignin Resorsinol Formaldehida (LRF) Menggunakan Ultrasonic Microwave-Assisted Extraction (UMAE) Ramandani, Adityas Agung; Shintawati, Shintawati; Aji, Salomo Pranata; Sunarsi, Sunarsi
CHEESA: Chemical Engineering Research Articles Vol. 5 No. 1 (2022)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v5i1.10348.40-48

Abstract

Limbah padat serai wangi mengandung lignin cukup tinggi yang dapat berpotensi untuk dikembangkan menjadi berbagai produk komersial, salah satunya adalah perekat. Tujuan dari penelitian ini adalah untuk mendapatkan kondisi optimum dalam pembuatan lignin resorsinol formaldehida (LRF) dari limbah serai wangi menggunakan metode Ultrasonic Microwave-Assisted Extraction (UMAE). Rancangan percobaan menggunakan response surface methodology (RSM) khususnya Box-Behnken Design (BBD). Variabel bebas dalam riset ini adalah volume NaOH (10, 13 dan 16 mL), waktu reaksi (10, 20 dan 30 menit), dan komposisi perekat (4, 6 dan 8 gram). Hasil penelitian menunjukkan perekat lignin LRF yang dihasilkan memenuhi SNI 06-4567-1998 untuk parameter berat jenis, waktu gelatinisasi, dan sisa penguapan. Daya tahan rekat (delaminasi) LRF yang dihasilkan memenuhi standar JAS 1996 yaitu rata rata 0%. Kondisi optimum pembuatan LRF dicapai pada penambahan NaOH 15,0561 mL, waktu reaksi 20 menit dan massa lignin 4 gram dengan daya tahan rekat (delaminasi) tertinggi yang dihasilkan 1 %.
Silica Adsorption from Boiler Effluent Using Activated Charcoal Derived from Palm Oil Fibre Waste with H3PO4 Activator Fernando, Ricky; Shintawati, Shintawati; Alvita, Livia Rhea; Wulandari, Yeni Ria; Ramandani, Adityas Agung; Arief, Febrina
CHEESA: Chemical Engineering Research Articles Vol. 7 No. 2 (2024): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v7i2.17500.75-83

Abstract

Most waste from palm oil processing can be repurposed, such as using palm fibre waste to create activated charcoal. This study aimed to assess the effectiveness of activated charcoal, produced by activating palm fibre with H₃PO₄, in removing silica from boiler output water. The production process involved pyrolysis at 200ºC for 2.5 hours. A completely randomized design was employed to test the effects of different H₃PO₄ concentration (with 1 to 2 M) and reaction times (30, 60, and 90 min). Results revealed that the moisture content of the activated charcoal ranged from 1.96% to 2.42%, ash content from 9.82% to 21.63%, and iodine adsorption from 366.43 to 457.87 mg/g. The highest silica adsorption capacity (3.5 g/g) was achieved with 2 M H₃PO₄ for 90 min. This indicates that palm fibre-derived activated charcoal is effective for silica removal, highlighting it is potential for enhancing environmental sustainability in industrial sector.
Advanced oxidation processes technology using the Fenton method in Bakung landfill leachate treatment Teguh, Dedi; Cendekia, Devy; Wulandari, Yeni Ria; Putri, Cynthia Eka; Ramandani, Adityas Agung
Journal of Natural Sciences and Mathematics Research Vol. 10 No. 2 (2024): December
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

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

Abstract

The primary issue at the Bakung final processing location was the high organic and inorganic material concentration. Toxicity, high chemical oxygen demand (COD), a black hue, and an unpleasant smell can usually identify landfill leachate; it can be hazardous if spilled directly into a body of water. Consequently, the implementation of an efficient leachate treatment was necessary. One use of this cutting-edge oxidation process technology consists of the Fenton method for treating leachate. The goals of this study involve implementing the Fenton technique to leachate treatment and ascertaining the impact of reaction time (30, 60, 90, or 120 min) and Fenton molar ratio (1:150, 1:200, or 1:250) on color degradation and chemical oxygen demand (COD). A Fenton molar ratio of 1:150 and a 120-min reaction period were ideal, resulting in maximum color and COD degradation percentages of 91.4% and 92.4%, respectively. The study's findings demonstrate how well the Fenton approach works to reduce COD and color in leachate while also meeting leachate water quality requirements for enterprises and/or ultimate waste processing operations.
Sustainable Recovery of SiO₂, Al₂O₃, and MgO from Slag, Aluminum Cans, and Bittern Sukma, Vinda Avri; Dahla, Astryd Viandila; Sudibyo, Sudibyo; Wulandari, Yeni Ria; Ramandani, Adityas Agung
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 1 (2025): March 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i1.47-58

Abstract

This study investigates the utilization of solid waste from slag and aluminum cans as sources of valuable raw materials, along with bittern waste for magnesium oxide (MgO)cons production. Slag, a byproduct of industrial combustion in the palm oil industry, and aluminum cans, generated from human consumption in urban areas, were both subjected to leaching processes to recover silica (SiO₂) and alumina (Al₂O₃), respectively. The leaching of slag using 4 M NaOH yielded 85.68% SiO₂, while aluminum cans treated with 4 M HCl produced 85.90% Al₂O₃. Additionally, the study extracted MgO from bittern waste via precipitation, resulting in 76.98% MgO. X-ray fluorescence (XRF) analysis was employed used to determine the composition of the slag, aluminum can waste, and bittern, while X-ray diffraction (XRD) analysis confirmed the crystallinity of the recovered materials. The integration of recycled materials into the production of cordierite ceramics represents an innovative approach to waste valorization, offering potential for the development of advanced materials from industrial and urban waste. This research highlights the potential for valorizing industrial and municipal solid wastes through chemical processes, contributing to sustainable resource recovery and environmental conservation.
Synergistic ultrasonic-microwave assisted extraction (UMAE) for enhanced fat extraction from nutmeg seeds Afifah, Meita; Teguh, Dedi; Shintawati; Ramandani, Adityas Agung
Jurnal Rekayasa Proses Vol 19 No 1 (2025): Volume 19, Number 1, 2025
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.16283

Abstract

Nutmeg seeds contain essential oils and fats, are widely used in the cosmetic and pharmaceutical industries. This research aims to determine the yield, physicochemical characteristics and fat composition of nutmeg seeds extracted from Ultrasonic-Microwave Extraction (UMAE). The research used a factorial completely randomized design (CRD) method with the independent variables, length of extraction time (45, 90, 135 minutes) and microwave power (300 and 450 watts). The dependent variables in this research are yield, melting point, specific gravity, acid number and saponification number. The results showed that the highest fat yield of nutmeg was 30.48% at 300 Watts and 135 minutes. The physicochemical characteristic of nutmeg fat was yellow with specific gravity, melting point, acid number and saponification number were 0.96, 52.4 °C, 16.69 mg KOH/g fat and 254.96 mg KOH/gram fat. GCMS results show that the fat composition is trichloromethyl, isopropyl phosphoranidothioic acid and lauric acid triglyceride which have potential as cosmetic raw materials.
Enzymatic saccharification of liquid sugar from cassava peel starch: Optimization and characteristics Maulidia, Indah; Rina, Oktaf; Shintawati; Elsyana, Vida; Ramandani, Adityas Agung; Siti Purnani, Mawar
Jurnal Rekayasa Proses Vol 18 No 2 (2024): Volume 18, Number 2, 2024
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.13727

Abstract

The province of Lampung generated 2.6 million tons of cassava and 0.28 million tons of inner cassava peel waste in 2020. This demonstrates that the value of production is closely correlated with the amount of trash generated. 44-59% starch is still present in the waste from the inside of cassava peels, and this starch can be used as an input to make liquid sugar. Using the Response Surface Methodology (RSM) tool, this study attempts to optimize the saccharification process with modifications in duration (2, 4, and 8 h) and temperature (55, 60, and 65°C). Liquification and saccharification are the enzymatic processes used to make liquid sugar from cassava peel. According to study findings, the starch yield from cassava peels was 11.54%, with corresponding levels of water, ash, starch, and crude fiber of 13.53, 0.61, and 88.32%, and 1.025%, respectively. The yield of liquid sugar obtained from saccharification of cassava peel starch is 58.36%. The water and ash contents are 58.07, 16.95, and 0.11%, respectively, with the quality of lowering sugar content. Using the RSM approach, this study was able to optimize the saccharification process of liquid sugar from cassava peel starch at a temperature of 67.07 °C and a time variation of 6.8 hours. The optimized conditions resulted in a higher yield of liquid sugar from cassava peel starch. This study highlights the potential of utilizing cassava peels as a valuable source for liquid sugar production.
Co-firing briquette fuel from coal waste and palm kernel shells: Optimization and validation Aji, Salomo Pranata; Afifah, Dian Ayu; Silmi, Fadian Farisan; Cendekia, Devy; Wulandari, Yeni Ria; Ramandani, Adityas Agung; Shintawati
Jurnal Rekayasa Proses Vol 0 No 0.1 (3000): ONLINE FIRST
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.16419

Abstract

The low-rank coal is increasing every year but still slightly exploited by the industry, due to it being caused by the low-calorie value of the low-rank coal waste. Therefore, the mixture of other biomass is expected to raise the calorie value. This approach could potentially make the low-rank coal more economically viable for use in various industries, especially as a source of energy. Additionally, further research and development in this area could lead to more efficient and sustainable energy production methods. The study uses the Central Composite Design with ratio of low-rank coal waste and palm kernel shells of 40%: 60%, 60%: 40%, and 80%: 20% and variations of the glue starch (5 to 7%), which have been optimized and validated using the Response Surface Method approach. The results of the study showed volatile matter, fixed carbon, and calorie values of 61.43% to 71.69%, 16.56% to 26.98%, and 5190.44 to 6330.40 kcal/g, respectively. The results also demonstrated that the glue with 6% variation showed the highest fixed carbon content and calorie value in comparison to the other variations. The optimum of concentration of low-rank coal and palm kernel shell for co-firing of 80: 20% with 5% glue addition resulting in a volatile matter, fixed carbon, calorie value, flame capacity, flammability, of 54.41%, 33.39%, 6192.123 kcal/g, 14.12 min, and 0.052 g/min, respectively. The validation process also met the requirements for SNI 01-6235-2000 and SNI 8675-2018. Overall, the study concluded that the co-firing of low-rank coal waste and palm kernel shell with glue starch can result in an optimized fuel mixture with high performance characteristics. These findings are significant for industries looking to improve their energy efficiency and reduce emissions.
Co-Authors Afifah, Dian Ayu Afifah, Meita Agustina, Tika Aji, Salomo Pranata Alvita, Livia Rhea Arief, Febrina Cendekia, Devy Dahla, Astryd Viandila Didik, Nurjan Efendi, Dimas Amirul Mukminin Nur Eko Risdianto Elsyana, Vida Fadian Farisan Silmi Herlambang, M. Julian Indah Maulidia, Indah Oktaf Rina Prihatini, Chindy Aulia Purnani, Mawar Siti Putri, Cynthia Eka Putri, Herma Kurnia Ricky Fernando Shintawati shintawati, shintawati Siti Purnani, Mawar Sudibyo Sudibyo Sukma, Vinda Avri Sunarsi, Sunarsi Syamsuri, Iyappateya Gelegar Dirgantara Teguh, Dedi Wulandari, Yeni Ria