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Rusdianasari Rusdianasari
Politeknik Negeri Sriwijaya
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Biodiesel Production from Rubber Seed Oil as An Alternative Energy Source – A Review Herawati Budiastuti; Nira Aulia Hanifah; Devita Utami Mardiani; Haryadi Haryadi; Rusdianasari Rusdianasari; Ahmad Fudholi
Jurnal Internasional Penelitian Teknologi Terapan Vol 3 No 2 (2022): October 2022
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v3i2.92

Abstract

Biodiesel is one of alternative energies that can be used to overcome problem caused by limited amount of fossil fuels reserved. Biodiesel can be made from rubber seed oil that has high potencies in Indonesia. The availability of rubber seed is quite much with more than 3-million-hectare rubber plantation area. The production of biodiesel from rubber seed oil has been carried out by several researchers using various methods. Therefore, this study was conducted as a review to obtain optimum operation conditions and effect of antioxidant addition in biodiesel production. Production methods of biodiesel from rubber seed oil observed in this study are esterification-transesterification, one stage transesterification, and in situ transesterification methods. Types of antioxidant added to biodiesel from rubber seed oil observed are TBHQ, D-TBHQ, BHA, BHT, PG, and OG. Esterification-transesterification was chosen as the most effective method in producing biodiesel with a minimum yield of 96.4%. Antioxidant addition of TBHQ with 1000 × 10-6 (ω) dosage was selected as the most effective to increase biodiesel induction period to become 6.41 hours, fulfilling the SNI 7182-2015 standard, which is minimum of 6 hours. Standard used as the reference for observing biodiesel parameters is SNI 7182-2015.
Biocoal Characterization as an Environmentally Friendly Alternative Energy Innovation Composite Variations of Gasified Char with Coconut Shell Charcoal Aria Yopianita; Aida Syarif; Muhammad Yerizam; Rusdianasari Rusdianasari
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 7, No 2 (2022): June 2022
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v7.i2.68

Abstract

In accordance with the mandate of the Regulation of the Indonesian Minister of Energy and Mineral Resources for the use of cleaner coal through coal gasification projects, in the future the coal gasification industry will produce char as a by-product. This study aims to characterize coal gasification char using a prototype underground coal gasification (UCG) and the addition of coconut shell charcoal biomass as a raw material for making biobriquettes. By using coal as raw material from the Muara Tiga Besar Mine of PT Bukit Asam, five kinds of coal samples from different layers were obtained, which from the characterization results, both coal and char, did not have too significant deviations so that the research variables could be ignored. The results of the characterization of char from coal gasification results compared to the initial sample of coal showed an increase in calorific value, a decrease in sulfur content and a significant decrease in water content, so it can be concluded that char from coal gasification has good potential as a raw material for biobriquettes. By using char and coconut shell charcoal with the ratio of variations in the composition of char and coconut shell compositions is 100%:0%; 75%:25%; 50%:50%; 25%:75% and 0%:100% carried out the briquetting process. The results of the biobriquette characterization met the criteria of the Indonesian National Standard (SNI) 01-6235-2000 and Minister of Energy and Mineral Resources regulation No. 047 of 2006
Pembuatan Briket Komposit Cangkang Sawit dan Tempurung Kelapa dengan Variasi Perekat Tepung Tapioka sebagai Bahan Bakar Alternatif Nurhamida Nurhamida; Rusdianasari Rusdianasari; Mustain Zamhari
Jurnal Teknologi Vol 23, No 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v23i2.4148

Abstract

Waste from the agricultural sector in Indonesia that may be used as fuel is plentiful, but it is not well utilized by the community. The usage of wood charcoal fuel, which is extensively utilized as an energy source, would undoubtedly have a detrimental influence on the environment if used directly and constantly without passing through a particular process. Furthermore, as the consumption of oil and gas energy sources grows, the availability of oil and gas energy sources will become progressively reduced. This problem may be solved by converting it into ecologically beneficial charcoal briquettes and promoting the use of biomass waste in agriculture. Charcoal briquettes are an environmentally friendly source of biomass energy made by bonding mashed materials (such as sawdust, coconut shells, palm shells, rice husks, corn cobs, and other combustible materials) into solid blocks that are compressed under pressure using a binder in the form of tapioca flour solution. The purpose of this research is to evaluate the properties of composite briquettes made of palm kernel shells and coconut shell charcoal so that they may be utilized as alternative fuels to replace fossil fuels. The method used in this study is an experiment with qualitative analysis. Based on the results of the examination, the greatest proximate studied had the following characteristics: water content of 6.5%, ash content of 7%, flying substance content of 21%, and calorific value of 5448.1737 The findings obtained are consistent with the quality standards of charcoal briquettes established by SNI No. 01-6235-2000.
Integrated Wastewater Processing using Electrogoagulation Method into Oxyhydrogen (HHO) for Renewable Energy Rusdianasari Rusdianasari; Ahmad Taqwa; Aida Syarif; Yohandi Bow
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 1 (2024): February 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i1.48

Abstract

Integrated wastewater is one of the contributors to wastewater that can harm the environment, thus fast industrial expansion must be followed by advancements in wastewater processing systems. Because the presence of contaminants in integrated wastewater can cause several issues for persons and the environment, integrated wastewater processing is required. One type of integrated wastewater processing is the production of hydrogen gas as a new and sustainable energy source. The electrocoagulation process may be used to convert integrated wastewater into hydrogen gas. One type of integrated wastewater processing is the production of hydrogen gas as a new and sustainable energy source. The electrocoagulation process may be used to convert integrated wastewater into hydrogen gas. In this study, oxyhydrogen (HHO) was produced from integrated wastewater utilizing two process stages: integrated wastewater processing with an electrocoagulator, followed by the process of getting HHO using an oxyhydrogen reactor. A NaOH catalyst was applied at different concentrations of 0.1 M, 0.2 M, 0.3 M, 0.4 M, and 0.5 M with an electrolysis period of 5 minutes to produce hydrogen gas. The addition of the NaOH catalyst is intended to find the optimal concentration for the production of hydrogen gas. According to the findings of the study and analysis, the optimal NaOH catalyst concentration for producing hydrogen gas is 0.5 M with hydrogen content of 346 mg/m3.Keywords: electrocoagulation, oxyhydrogen, integrated wastewater, renewable energy
UJI KINERJA KOMPOSIT BENTONIT-KARBON AKTIF KULIT DURIAN SEBAGAI ADSORPSI LOGAM BESI (Fe) DALAM LIMBAH TEKSTIL JUMPUTAN Tiara Reska; Rusdianasari Rusdianasari; Muhammad Zaman
Jurnal Inovasi Teknik Kimia Vol. 10 No. 3 (2025): July | INTEKA - Jurnal Inovasi Teknik Kimia
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v10i3.14828

Abstract

Kandungan logam besi (Fe) yang terdapat dalam limbah tekstil jumputan dapat menimbulkan pencemaran lingkungan di sekitar industri. Salah satu metode untuk mengurangi kandungan logam besi (Fe) dalam limbah tekstil jumputan yaitu melalui proses adsorpsi. Kulit durian mengandung selulosa yang tinggi yaitu 50-60%, lignin dan pati masing-masing 5% yang berpotensi dapat dijadikan bahan baku untuk pembuatan karbon aktif. Pembuatan karbon aktif ini dapat dikombinasikan dengan bentonit. Bentonit merupakan adsorben yang dapat digunakan karena banyak mengandung monmorillonite dan kemampuan mengembang. Tujuan dari penelitian ini yaitu menentukan kemampuan efisiensi adsorben dan kapasitas adsorpsi maksimum komposit bentonit-karbon aktif kulit durian serta menentukan model isoterm yang digunakan. Penelitian ini menggunakan metode adsorpsi dengan variasi aktivaktor konsentrasi KOH 2M, 3M dan 4M dan variasi waktu pengontakan 10, 20, 30 dan 40 menit selanjutnya dilakukan analisa konsentrasi logam besi (Fe) menggunakan alat spektofotometri serapan atom (AAS). Didapatkan hasil yakni bahwa aktivator konsentrasi KOH 3M dengan waktu optimum pengontakan 40 menit didapat nilai efisiensi adsorpsi sebesar 94,96% dan kapasitas adsorpsi maksimum sebesar 3,30 mg/g, serta penentuan model isoterm adsorpsi mengikuti model isoterm langmuir dikarenakan memiliki nilai R2 yang mendekati 1, yakni dengan nilai yang didapat sebesar 0.9954.
COMPARATIVE REVIEW OF VARIOUS ORGANIC WASTES DERIVED FROM ANIMALS AND PLANTS IN ANAEROBIC DIGESTION FOR BIOGAS PRODUCTION Helena - Febrianti; Fajar Pendawa; Muhammad Rivaldo Hanitama; Rusdianasari Rusdianasari
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol. 15 No. 01 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v15i01.37434

Abstract

Abstract--Increased production of organic waste from the livestock, agriculture, urban, and agro-industrial sectors poses significant environmental challenges if not managed properly. Anaerobic digestion (AD) is an effective technology for processing organic waste while producing renewable energy in the form of biogas. However, the performance of the AD process is greatly influenced by substrate characteristics, such as the carbon to nitrogen (C/N) ratio, lignocellulose content, nitrogen content, and chemical conditions of the substrate. This article aims to conduct a comparative review of various types of animal and plant-based organic waste used in biogas production through the AD process, with an emphasis on methane potential, operational constraints, and process optimization strategies. The method used is a narrative literature review of national and international journal articles discussing the utilization of livestock manure (cattle, chicken, pigs, and goats), food waste, lignocellulosic biomass (rice straw, water hyacinth, and grass), and agro-industrial liquid waste (tofu liquid waste and Palm Oil Mill Effluent/POME). The results of the study show that cow manure has good process stability but relatively moderate methane yield, while chicken and pig manure have higher methane potential but are susceptible to ammonia inhibition. Plant-based and agro-industrial waste generally has high energy potential, but faces obstacles in the form of slow hydrolysis, acidic pH, and nutrient imbalance. Based on the results of the study, anaerobic co-digestion (ACoD) has been proven to be the most effective strategy for optimizing biogas production. This approach is able to balance the C/N ratio, increase buffer capacity, reduce inhibition effects, and improve microbiological stability. The combination of substrates that produces a mixed C/N ratio in the optimal range of 20–30 has been consistently reported to increase methane yield and AD process stability. Thus, substrate selection and formulation through co-digestion are key to developing an efficient and sustainable biogas system.
Co-Authors Ahmad Fudholi Ahmad Taqwa Aida Syarif Aria Yopianita Devita Utami Mardiani Fajar Pendawa Fradina Septiarini Haryadi Haryadi Helena - Febrianti Herawati Budiastuti Ibnu Hajar Indri Ariyanti Leila Kalsum Leila Utarina Lukmanul Hakim M. Muhajir Maryam Seyaski Fitria Moulita, RA Nurul Muhammad Rivaldo Hanitama Muhammad Taufik Muhammad Yerizam Muhammad Zaman Mustain Zamhari Nira Aulia Hanifah Nurhamida Nurhamida RD Kusumanto Siproni Siproni Tiara Reska Tresna Dewi Yohandi Bow Yohandri Bow Yohandri Bow