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All Journal International Journal of Advances in Applied Sciences Jurnal Bahan Alam Terbarukan CHEMICA Jurnal Teknik Kimia Jurnal Matematika & Sains Eksergi: Chemical Engineering Journal Bulletin of Chemical Reaction Engineering & Catalysis GRADIEN Elkawnie Agroindustrial Technology Journal Indonesia Berdaya Journal of Agri-Food Science and Technology (JAFoST) Abdimas Indonesian Journal Open Science and Technology Pelita: Jurnal Pengabdian kepada Masyarakat Indonesian Journal of Chemical Engineering Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Abdimas
Totok Eka Suharto
Department Of Chemical Engineering, Faculty Of Industrial Technology, Universitas Ahmad Dahlan, Kampus 4, Jl. Ringroad Selatan, Kragilan, Yogyakarta
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Iron Impregnation on Activated Carbon Prepared from Tamarind Wood (Tamarindus Indica L.) as a Potential Catalyst in Biodiesel Production Astuti, Erna; Suharto, Totok Eka; Setyawan, Martomo; Hanin, Nabila; Mulyono, Sekar Larasati
Jurnal Bahan Alam Terbarukan Vol 13, No 1 (2024): June 2024 [Nationally Accredited Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v13i1.49517

Abstract

Renewable energy in the form of biodiesel requires a process called transesterification. This process runs slowly, so a catalyst is needed to reduce the activation energy and speed up the reaction rate. Activated carbon is one of the supports in transesterification catalysts because of its high surface area and is proven to be effective in gas or liquid phase reactions. This work aims to study the potential of active carbon from tamarind wood for making catalysts, the characteristics of the catalyst and the optimal concentration of Fe(NO3)3 in the impregnation step. Activated carbon was impregnated using an Ultrasonic Processor with 80% strength at 60 oC for 60 minutes. The impregnation process was carried out with variations of 2, 4, and 6% Fe(NO3)3 dissolved in 0.09M isopropyl alcohol. Variation of processing time 30, 40, 50, 60, 70, 80 minutes. Furthermore, after the activated carbon is allowed to stand for 24 hours, a calcination process is carried out at 300oC to remove impurities. Obtained materials have been characterized by SEM and XRD. The Fe-impregnation process has been successfully carried out on activated carbon made from Tamarind wood (Tamarindus indica L.). In the Fe precursor solution concentration range of 2 – 6%, the higher the concentration of the Fe precursor solution, the higher the impregnated Fe metal. Fe-impregnated activated carbon has the characteristics of being a material consisting of a mixture of crystalline and amorphous phases with even porous surface morphology. This Fe-impregnated activated carbon is a potential material as a catalyst in the biodiesel production process.
Pemberdayaan Masyarakat dalam Produksi Pasir Zeolit Alam di BUMDes Hargomulyo Gunung Kidul Suharto, Totok Eka; Satar, Ibdal; Permadi, Adi; Hapsari, Wahyu Dewi; Syamsuddin, Arief
Abdimas Indonesian Journal Vol. 4 No. 1 (2024)
Publisher : Civiliza Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59525/aij.v4i1.348

Abstract

This community service activity is in partnership with the Hargomulyo District/Village Owned Enterprise (BUMDes).. The problems being addressed include the unavailability of natural zeolite rock crushing machine equipment to produce zeolite sand. This activity aims to provide a small-capacity natural zeolite rock crushing machine and train machine operations to produce zeolite sand. Considering the expensive new machines and limited funds, procuring rock crushing machines was carried out by upgrading used rock crushing machines in a workshop. The crushing machine has a chopper, a driving motor powered by a generator, and a sieve for the crushed rock with three-grain sizes. Operational trials of the rock chopping machine show that the machine can produce natural zeolite sand with three-grain sizes. Furthermore, operational training on natural zeolite crushing machines was carried out, which was attended by 20 participants from the Hargomulyo community. This training can increase the empowerment of training participants. The observations during the training showed that 90% of participants could operate a rock-crushing machine to produce natural zeolite sand.
Mechanical Characteristics of Concrete with Addition of Nickel Slag Waste as Aggregates Pelupessy, Safriyati; Mufrodi, Zahrul; Suharto, Totok Eka
Indonesian Journal of Chemical Engineering Vol. 2 No. 2 (2024)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/ijce.v2i2.1102

Abstract

Ferronickel slag is a waste product of the nickel metal smelting industry. PT. Virtue Dragon Nickel Industry is a company located in Konawe, Southeast Sulawesi Province, which is the first ferronickel and stainless-steel industrial area in Indonesia. Since 2017 until now, the capacity of the ferronickel smelting industry in the company is 600,000 tons. From the ferronickel smelting process, slag waste of around 3 million tons has also been produced which has not been processed or utilized. Slag waste is feared to disrupt the environment if not managed or utilized properly. This study aims to study the utilization of nickel slag waste as a substitute for fine and coarse aggregate in concrete. This study compares the mechanical properties of concrete using nickel slag material with the use of natural materials in the form of gravel and sand taken from the Konaweha River. The study was started with the preparation of nickel slag in the size of coarse aggregate 10-20 mm, and fine aggregate that passes 20 mesh. Nickel slag was tested for its content or composition. Slag was mixed into a concrete mixture containing sand, gravel, cement with a certain composition. The slag content was added at 0, 10, 20 and 30%. The stirred mixture was then tested for slump with an Abrams cylinder with a lower diameter of 20 cm, an upper diameter of 10 cm and a height of 30 cm. The mixture was molded in the form of a cube measuring 15 cm x 15 cm x 15 cm for density testing and compressive strength testing after 28 days. The test results showed that the largest slag content was silica and iron. The addition of nickel slag provided a slump value that was still included in the type of mixture with good performance. The addition of nickel slag up to 30% increased the density and compressive strength of concrete. The density of concrete increased by 6.7-21.9%. The increase in concrete compressive strength ranges from 8.43 to 33.79%. The mixture with the addition of 20% fine slag has the highest compressive strength of 33.23 MPa.
Empowerment of Cassava Leaf Silkworm Cultivation Groups Through Processing of Ceara Rubber Tree (Manihot Glaziovii) as Local Food Potential Subrata, Arsyad Cahya; Ibdal, Ibdal; Sudarmini, Sudarmini; Suharto, Totok Eka; Putranti, Deslaely; Rahmawan, Jihad; Aska, Ghoniyun Nisa Uskhulil; Hidayah, Laelatul
Indonesia Berdaya Vol 6, No 3 (2025)
Publisher : UKInstitute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ib.20251170

Abstract

Food security has become an increasingly urgent global issue as the impact of climate change and the global food crisis intensify. Indonesia, as an agrarian country, has great potential to strengthen its food system to be self-sufficient and sustainable, one of which is through the empowerment of local farmer groups. This article discusses efforts to enhance food security through agricultural product diversification by leveraging untapped local potential, specifically the processing of rubber tree (Manihot glaziovii) tuber skins. Empowerment activities were conducted with the Sutra Alam Gunung Sewu group in Gunungkidul Regency, DIY, which had previously only utilized the plant's leaves as silkworm feed. The tubers and bark of this tree, which are nutrient-rich but contain high levels of cyanide acid, have the potential to be developed as an alternative food source if processed properly. The empowerment program was implemented to enhance the group's capacity to process the tuber bark into useful products. Evaluation was conducted using pre-test and post-test instruments to measure improvements in members' knowledge and skills. The results showed a 120% increase in general knowledge and an 84% increase in understanding of information regarding the potential of local food and the processing of risky materials into safe consumption. This initiative contributes to food diversification and the economic empowerment of local communities in supporting national food security.
Phytochemical Test of Sacha Inchi Oil from Central Java Hadi, Mulyono; Permadi, Adi; Suharto, Totok Eka; Putri, Mutiara Wilson; Gulo, Herbert Alessandro Panias; Maema, Nadin Okta; Halimathusyakhdyah, Halimathusyakhdyah; Lupi, Ahmad
Journal of Agri-Food Science and Technology Vol. 6 No. 3 (2025): September
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/jafost.v6i3.12885

Abstract

Sacha inchi oil is a seed-derived oil from the Amazon Rainforest, known for its high nutritional value and bioactive compounds. It contains essential fatty acids such as omega-3 and omega-6, along with tocopherols, polyphenols, carotenoids, and phytosterols, making it beneficial for health applications. Due to its nutritional and therapeutic properties, sacha inchi oil has gained significant attention in the food, cosmetic, and pharmaceutical industries. This study contributed to identify and analyze the bioactive compounds in sacha inchi oil extracted from seeds obtained in Central Java, Indonesia. The extraction process was carried out using a hot pressing method, followed by qualitative phytochemical analysis and LC-HRMS identification. The phytochemical tests confirmed the presence of flavonoids, alkaloids, tannins, phenolics, saponins, steroids, and terpenoids, all of which contribute to antioxidant, anti-inflammatory, anticancer, and antimicrobial properties. However, LC-HRMS analysis did not detect flavonoids, tannins, and saponins, possibly due to their low concentration, matrix effects, or degradation during analysis. These findings highlight sacha inchi oil’s potential in nutraceutical, pharmaceutical, and cosmetic industries. Its bioactive compounds suggest its potential use in functional foods, dietary supplements, and therapeutic applications, particularly in preventing oxidative stress-related diseases. Further research is recommended to optimize extraction techniques, improve compound stability, and evaluate its bioavailability and long-term health benefits. The presence of bioactive compounds indicates that sacha inchi oil can be a valuable functional ingredient for health and medical applications, contributing to sustainable and natural health solutions.
Evaluation and Comparison Anti-aging Facial Serum from Algae Extract Permadi, Adi; Aziz, Abdul; Ramadani, Noorpani; Nazzal, Sami; Maryudi, Maryudi; Suharto, Totok Eka
CHEMICA: Jurnal Teknik Kimia Vol. 10 No. 3 (2023): December 2023 [Available online since December 26, 2023]
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v10i3.27898

Abstract

The demand for cosmetics in Indonesia is quite high so cosmetics can now be said to be a primary need. Therefore, various cosmetic products have emerged that are cheap and provide instant results but ignore the health aspects of the user. Several cosmetic products make a breakthrough by using natural ingredients. One natural material that can be used is microalgae which can produce bioactive compounds and has a relatively faster production process compared to other natural materials. In this research, the microalgae used were Chlorella sp. and Spirulina sp., and Sargassum sp. This research aims to make a serum based on the Chlorella sp., Spirulina sp. and Sargassum sp. microalgae. The research results showed that the standard testing of simplicial facial serum extracts of Spirulina sp., Chlorella sp., and Sargassum was by SNI No. 16-4399-1996.[ASUS1] [AP2]  All the metrics analyzed, such as organoleptic characteristics, pH, specific gravity, viscosity, active compounds, and microbiological contamination, have successfully fulfilled the required requirements in SNI no. 16-4399-1996.. The results of antioxidant activity testing showed that Chlorella sp. had higher antioxidant activity than the other three types of samples. However, the antioxidant results obtained are still very low and relatively weak, which means this serum does not fully contribute to antiaging. Further research needs to be carried out to obtain serum from microalgae with high levels of antioxidants, including by using fresh simplicia, elevated algae concentration or optimizing the operating conditions.     [ASUS1]Please add short information about the main results, whether the serum satisfies the standard or not, which parameters, etc. [AP2]Has been added
Utilization of the heat from combustion of water for the heating process in water desalination Permadi, Adi; Syamsuddin, Arief; Widyaningrum, Trianik; Satar, Ibdal; Suharto, Totok Eka; Pitoyo, Joko
International Journal of Advances in Applied Sciences Vol 13, No 1: March 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v13.i1.pp134-140

Abstract

The volume of municipal waste has become a national problem so far, so a solution is needed to reduce the waste problem. One solution to reduce the volume of municipal waste is to burn waste. However, the combustion needs to be designed to take advantage of the heat generated by combustion. In this study, the process of burning waste with various types of waste materials was carried out. The heat of burning waste is used to evaporate 1 liter of seawater and the seawater vapor is cooled to produce distilled water. The volume of distilled water and the precipitated salt were weighed. The results of the research from the variation of 6 types of waste materials obtained that the type of clothing waste material gave the fastest time, which was 43.75 minutes, the amount of distilled water was 931 ml, and salt deposited as much as 30 grams. The test results on distilled water showed that almost all parameters met the requirements of drinking water and obtained a salt content of 84%. Further processing by adjusting the hardness is needed to process distilled water into clean water and the addition of iodine can be considered to produce iodized salt.
Effect of Flow Rate Ratio of Air and Waste Cooking Oil on Combustion Temperature and Furnace Efficiency Idris, M.; Setyawan, Martomo; Suharto, Totok Eka
Eksergi Vol 22 No 1 (2025)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/eksergi.v22i1.13554

Abstract

Using waste cooking oil as an alternative fuel can reduce dependence on fossil fuels and address the problem of waste oil. This study aims to analyze the effect of the flow rate ratio of air and waste cooking oil on combustion characteristics and efficiency of domestic furnace. The experiment started with fuel characterization, including density, viscosity, flash point, and calorific value tests. The combustion process was carried out by varying the fuel and airflow to the furnace. Experiments included flame temperature measurements, water boiling tests, and measurements of heat uptake efficiency by the pot water. The results showed that the highest combustion temperature of 925.55℃ was achieved at an airflow rate of 21.3 m/s with a fuel flow rate of 1.05 L/hour. The flue gas emission temperature and furnace efficiency increased as the airflow rate and fuel discharge increased. The ratio also produces the fastest water boiling time of 2 minutes with the efficiency of heat uptake by water in the pot of 34.12%. The highest heat uptake efficiency by the water in the pot was obtained at the ratio of used cooking oil discharge of 0.6 L/hour with an airflow rate of 12.1 m/s at 43.12%. These results demonstrate the potential of waste cooking oil as an alternative fuel for efficient domestic combustion devices, with proper air supply to achieve optimal combustion.
Pelatihan Pembuatan Eco Enzyme dari Sampah Kulit Buah bagi Masyarakat Desa Sorogenen II Kulon Progo Permadi, Adi; Suharto, Totok Eka; Satar, Ibdal; Chasanah, Alfi; Kurniawan, Agung; Arwini, Arwini; Rahmawati, Daniar; Wahyuni, Denik Putri; Pawenang, Denta Kesdik; Safitri, Harminah; Sumardani, Wahyu Bintoro; Winarni, Winarni; Nafi’, Zahrotun; Suyitno, Suyitno
Pelita: Jurnal Pengabdian kepada Masyarakat Vol. 3 No. 3 (2023): Pelita: Jurnal Pengabdian kepada Masyarakat
Publisher : Perkumpulan Kualitama Edukatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51651/pjpm.v3i3.351

Abstract

Waste is a problem that has not been resolved properly in Indonesia. Likewise, in Sorogenen II village, Kulon Progo district, where the majority of livelihoods are farmers, gardeners and traders related to agriculture and plantations, there is still not much information on the management of organic waste, especially crop and fruit waste. Several efforts to utilize waste have been made. One way to utilize waste from fresh fruit peels is to ferment it with molasses so that after 3 months it will become eco enzyme. This enzyme liquid has been used as a natural fertilizer, pest repellent, and cleaning liquid. The training conducted by volunteers of the eco enzyme archipelago, PKK group and UAD community service team took place in Sorogenen II village, Kulon Progo district. In addition to the delivery of how to make eco enzyme, the utilization and business opportunities of eco enzyme were also delivered in the training. A showcase of eco enzyme products was also held at UAD and many visitors were enthusiastic about making eco enzyme independently.
Penyuluhan sebagai Strategi Peningkatan Pengetahuan Masyarakat tentang Dampak Sampah Plastik dan Pengelolaannya di Desa Panjangrejo Bantul Yogyakarta Satar, Ibdal; Syamsuddin, Arief; Suharto, Totok Eka; Permadi, Adi; Widyaningrum, Trianik; Khakim, Mufti; Baswara, Ahmad Raditya Cahya; Setyanto, Barry Nur
Pelita: Jurnal Pengabdian kepada Masyarakat Vol. 3 No. 3 (2023): Pelita: Jurnal Pengabdian kepada Masyarakat
Publisher : Perkumpulan Kualitama Edukatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51651/pjpm.v3i3.352

Abstract

Plastic waste has become a significant problem of environmental pollution in recent decades. The nature of plastic waste is complicated to decompose; it has worsened the environmental situation, especially if it is not taken seriously immediately. One approach that can be taken to overcome this problem is to provide counseling to the public so that they do not dispose of plastic waste carelessly. The community service program is a forum for academics to participate and provide counseling about the management of plastic waste. The purpose of this community service program is to counsel the Panjangrejo community about how to manage plastic waste properly. This counseling program began with discussions with the Panjangrejo sub-district officials and related parties, then continued with planning the timing of the extension. Residents and community elements are fully involved, so this program can run smoothly. The counseling program was carried out in three villages, namely the villages of Semampir, Gunung Puyuh, and Krapyak Wetan, and this program was held at night from 20.00 WIB to 22.00 WIB. The outreach results showed that people's knowledge about the dangers of plastic waste and how to manage it could be significantly improved (p < 0.05). In general, this extension program successfully increased respondents' knowledge from "not knowing" to "knowing better" about the dangers and how to manage plastic waste.
Co-Authors Abdul Aziz Adi Permadi Adi Permadi, Adi Agung Kurniawan Agus Sudaryono Arwini, Arwini Aska, Ghoniyun Nisa Uskhulil Baswara, Ahmad Raditya Cahya Chasanah, Alfi Cindy Wulandari Deslaely Putranti Devi Ratnawati Dewi, Kartika Tunggal Dimas, Doni Dwita Oktiarni Erna Astuti Fethi Kooli Firdaus, Stradivary Maulida Gulo, Herbert Alessandro Panias Hadi, Mulyono Halimathusyakhdyah, Halimathusyakhdyah Hanin, Nabila Hapsari, Intan Tri Hayuningtyas, Ratih Hendry Pangestu Hidayah, Laelatul Ibdal Satar Ibdal, Ibdal Irfan Gustian Is Fatimah Joko Pitoyo Joko Pitoyo Lupi, Ahmad M. Idris Maema, Nadin Okta Martomo Setyawan Maryudi Maryudi Mufti Khakim, Mufti Mulyono, Sekar Larasati Munawaroh, Annisa Luthfiana Nafi’, Zahrotun Nazzal, Sami Nur Halimah Pawenang, Denta Kesdik Pelupessy, Safriyati Pratiwi, Margaretha Herlin Putri, Mutiara Wilson Rahman, Zulfan Hanif Rahmawan, Jihad Rahmawati, Daniar Ramadani, Noorpani Safitri, Harminah Satar, Ibdal Setyanto, Barry Nur Sheikh Ahmad Izaddin Sheikh Mohd Ghazali Siti Jamilatun Siti Salamah Subrata, Arsyad Cahya Sudarmini Sudarmini, Sudarmini Sumardani, Wahyu Bintoro Suyitno Suyitno Syamsuddin, Arief Tole Sutikno Trianik Widyaningrum Wahyu Dewi Hapsari Wahyuni, Denik Putri Wardana, Mikael Dia Winarni Winarni Wulandari, Erika Zahrul Mufrodi, Zahrul