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All Journal Jurnal Hortikultura Indonesia (JHI) Vegetalika JOURNAL OF COASTAL DEVELOPMENT Bioma : Berkala Ilmiah Biologi JURNAL ANATOMI FISIOLOGI SAINS DAN MATEMATIKA Bioscience Jurnal Akademika Biologi Biogenesis: Jurnal Ilmiah Biologi Eksergi: Chemical Engineering Journal Jurnal RISET Geologi dan Pertambangan Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Ilmiah Dinamika Rekayasa (DINAREK) Pro-Life Jurnal Bioteknologi & Biosains Indonesia (JBBI) Jurnal Biodjati Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Biosaintifika: Journal of Biology & Biology Education Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) NICHE Journal of Tropical Biology Buletin Anatomi dan Fisiologi (Bulletin of Anatomy and Physiology) Astonjadro Jurnal Sains dan Teknologi Reaksi Multicience Jurnal Energi Baru dan Terbarukan Jurnal IPTEK Bagi Masyarakat Makara Journal of Science Journal of Innovation and Research in Primary Education AGRIC Advance Sustainable Science, Engineering and Technology (ASSET)
Sri Widodo Agung Suedy
Biology Study Program, Department Of Biology, Faculty Of Science And Mathematics, Diponegoro University, Jl. Soedarto, Tembalang, Semarang, Central Java
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Integrating Solar Energy and Waste-to-Energy Systems for Urban Renewable Energy Development: A Case Study of Cilegon City, Indonesia Rizky Ramadhan Marlamsya; Silviana Silviana; Sri Widodo Agung Suedy
Journal of Innovation and Research in Primary Education Vol. 5 No. 1 (2026)
Publisher : Papanda Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56916/jirpe.v5i1.2876

Abstract

Indonesia's renewable energy penetration (12.3% in 2022) lags significantly behind 2030 targets (19-23%), with Cilegon City facing 1,167 unelectrified households and rising waste generation. This study assessed renewable energy development potential through LEAP-based electricity demand modeling (2023-2033) and technical-economic evaluation of solar photovoltaic and Refuse-Derived Fuel (RDF) systems. Meteorological and waste generation data informed engineering calculations and financial feasibility analysis. LEAP projections indicate residential electricity demand reaching 728.1 MWh per household by 2033, driven by 13.9% population growth. Off-grid solar PV systems demonstrate viability with Rp. 5,774/kWh levelized cost for unserved households. The proposed UPTD 3 Merak RDF facility shows strong economics: 22 tonnes/day capacity, 2-year payback, Rp. 12.5 billion NPV, and 3.01 benefit-cost ratio. Findings reveal that institutional rather than technical barriers impede deployment, highlighting needs for standardized subsidies, clarified jurisdictional frameworks, and municipal-utility partnerships. This research advances urban renewable energy planning by integrating bottom-up energy modeling with localized assessments, providing replicable frameworks for Indonesian cities pursuing energy transition and environmental sustainability goals.
Korelasi Karakter Morfologis dengan Fisiologis Biji Famili Asteraceae di Kaki Gunung Ungaran Theresia Bianca Lucretia Olivia; Sri Widodo Agung Suedy; Endang Saptiningsih
Vegetalika Vol 14, No 2 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/veg.102886

Abstract

The Asteraceae family has a wide distribution supported by its adaptive capabilities, including seed morphological traits that influence physiological performance. This study aims to determine the morphological characteristics, physiological performance of seeds, and their correlation in members of the Asteraceae family at the foothills of Mount Ungaran. The findings of this study can also be applied and provide opportunities for further research on seed physiology, particularly in Asteraceae species. The observed parameters in this study include morphological traits (growth habit, achene type, achene length, pappus type, and pappus length) and physiological traits (maturation period, imbibition, germination percentage, germination rate, mean germination time, and vigor) in Asteraceae species at the foothills of Mount Ungaran. The study employs analysis of variance (ANOVA) and Principal Component Analysis (PCA) to assess the significant influence of species differences on seed physiological traits and the strong correlation between morphological and physiological characteristics. Species variation significantly affects seed trait diversity, with morphology playing a crucial role in determining physiological performance and supporting adaptive strategies for survival.
Performance Optimization of a Petrochemical Cooling Tower via Fill Replacement: Cleanflow vs Cleanflow Plus Demas Ahmad Resha Putra Hidayat; Berkah Fajar Tamtomo Kiono; Sri Widodo Agung Suedy
Advance Sustainable Science Engineering and Technology Vol. 8 No. 3 (2026): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i3.2574

Abstract

This study investigates the performance improvement of an induced draft, counterflow cooling tower after replacing the existing Cleanflow fill with Cleanflow Plus. One cell (E) was upgraded while four cells (A–D) served as the baseline under CTI ATC-105 procedures. Measurements included outlet temperature, wet-bulb temperature, circulation flow, and fan power. Results show that Cell E achieved a higher cooling range (9.20°C vs. 8.63°C average) and a lower approach (6.29°C vs. 6.87°C average). Heat-transfer capacity increased from 37.12 MW average to 39.60 MW (+6.68%). Tower capability improved from 89.00% average to 94.47% (+5.47% absolute, +6.1% relative). Number of Transfer Units (NTU) increased significantly from 2.341 to 2.889 units (+23.4%), and effectiveness improved from 71.5% to 75.9% (+6.1%). Evaporation increased from 1.21% to 1.29% (6.6%), while electrical fan power was 149.65 kW (+2.4% relative to baseline). These enhancements are attributed to the higher specific surface area (140.7 m²/m³ vs. 127.0 m²/m³, +10.8%) and improved wettability of Cleanflow Plus fill. The findings support phased implementation and further optimization across remaining cells.
MELISOPALINOLOGY OF KLANCENG HONEY FROM 4 LOCATIONS IN KLATEN, MAGELANG, AND BOYOLALI DISTRICTS Nurul Hidayati; Sri Widodo Agung Suedy; Kasiyati; Muh Samsudin
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 6 No. 01 (2026): INTERNATIONAL JOURNAL OF MULTISCIENCE - JANUARY-APRIL 2026
Publisher : CV KULTURA DIGITAL MEDIA

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

Abstract

Klanceng honey is a type of honey produced by stingless bees. The characteristics of klanceng honey are a liquid texture and a more sour or bitter taste. The content of honey is influenced by the honey's food source, which can be seen from the pollen contained in the honey. Identified pollen can be used to indicate the characteristics of the plants that serve as bee food sources. The purpose of this study was to determine the diversity of pollen sources in klanceng honey from Penggung Village, Boyolali Regency; Kebonrejo Village, Magelang Regency; Ceper Village, and Ngemplak Village, Klaten Regency, which can be used to identify plants that serve as bee food sources and be used to label honey based on its food source. The sampling method used exploratory sampling with purposive sampling. The pollen analysis method used acetolysis. Data analysis used descriptive analysis. The results of melisopalinology showed that there were 26 plant pollen families contained in the four klanceng honeys, with coconut (Cocos nucifera) pollen being the most dominant. Klanceng honey from Ceper and Kebonrejo villages is monofloral, while honey from Penggung village is bifloral, and honey from Ngemplak village is multifloral. The conclusion of this study is that the plant diversity of klanceng bees' food sources is diverse.
Analysis Effect of Nano Chitosan Coating on The Quality of Shallot Bulbs (Allium ascalonicum L. var. Bauji) Della Widya Puspita; Erma Prihastanti; Sri Widodo Agung Suedy; Agus Subagio
Jurnal Biodjati Vol 7 No 1 (2022): May
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/biodjati.v7i1.14900

Abstract

Shallots are bulb-shaped commodities that are difficult to maintain in new conditions because they are easily damaged. An effective effort to prevent deterioration of food quality during storage is by coating it using nano chitosan. The effectiveness of nano chitosan is influenced by particle size which related to the ratio of chitosan and STPP (sodium tripolyphosphate). This study aimed to determine the effect of nano chitosan coating with the addition of different ratios of chitosan and STPP and the appropriate ratio of chitosan and STPP on nano chitosan as a coating to maintain the quality of shallot bulbs (Allium ascalonicum L. var. Bauji). This study used a completely randomized design (CRD) method with four treatments and five replications. The treatments of this research were P0= Control, PI= Nano chitosan ratio of chitosan: STPP 1:3, P2= Nano chitosan ratio of chitosan:STPP 1:4, and P3= Nano chitosan ratio of chitosan:STPP 1:5. The variables of this study were the percentage of damage, the percentage of diameter shrinkage, weight loss, color, hardness, and moisture content. Data were analyzed using the ANOVA test and continued with the DMRT test. The application of nano chitosan coating on shallot bulbs could reduce damage, shrinkage of tuber diameter, weight loss, color, hardness, and decrease in water content better than the control treatment. The best results were shown by treatment P3 (1:5) with a percentage of damage of 8%, diameter shrinkage of 20.20%, weight loss of 18.40%, total color change of 54.45, hardness of 226.23 N, and a decrease in water content of 4.65% at the final water content of 79.09%.
Integration of Energy Quality and Financial Feasibility in the Production of Oil Palm Frond Chips and Pellets Yogi Alamsah; Widayat Widayat; Sri Widodo Agung Suedy
Jurnal IPTEK Bagi Masyarakat Vol 5 No 3 (2026)
Publisher : Ali Institute of Research and Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55537/j-ibm.v5i3.1652

Abstract

Indonesia, as the world’s largest palm oil producer, generates significant quantities of oil palm frond (OPF) biomass that remain underutilized. This study evaluates the technical characteristics and economic feasibility of converting OPF into energy products in the form of chips and pellets. Laboratory analyses including proximate, ultimate, and calorific value tests were conducted to assess fuel quality, followed by a techno-economic evaluation using a 15-year investment horizon and an 11% discount rate. Results show that pelletization improves fuel properties, particularly by reducing moisture content and increasing calorific value under actual conditions. The higher heating value (HHV) of pellets reached 3,962 kcal/kg under air-dry conditions, compared to 1,746 kcal/kg for chips. On a dry ash-free basis, the calorific values of both products were comparable, indicating that moisture content significantly influences actual energy performance. Economic analysis indicates that pellet production under coal price equivalence schemes does not achieve attractive financial returns, with internal rates of return (IRR) below the discount rate and payback periods exceeding project lifetime. Sensitivity analysis suggests that a selling price of Rp1,000,000 per ton or a calorific value above 5,300 kcal/kg is required to reach financial feasibility. In contrast, chip production with low calorific value is economically unviable; however, improving chip quality to 4,060 kcal/kg results in a financially feasible scenario, achieving an IRR of 32.3% and payback within four years. The findings highlight that product form, energy quality, and market pricing mechanisms critically determine the viability of OPF-based bioenergy development.
Analysis of a Rooftop Solar Power Plant in the Amamapare Coal-Fired Power Plant Area to Maximize the Plant’s Energy Output Oktapianus Ala; Jaka Windarta; Sri Widodo Agung Suedy
Jurnal IPTEK Bagi Masyarakat Vol 6 No 1 (2026)
Publisher : Ali Institute of Research and Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55537/j-ibm.v6i1.1665

Abstract

The increasing electricity demand in the operational area of PT Freeport Indonesia, particularly at the Amamapare Coal-Fired Power Plant, has encouraged the integration of renewable energy systems to reduce fossil fuel dependency and carbon emissions. This study aims to evaluate the technical, economic, and environmental feasibility of utilizing the coal stockpile roof area for a rooftop solar power plant installation. The research employed a quantitative descriptive approach using field observations, operational data, and PVsyst simulation. The results indicate that the available roof area of 18,825 m² can accommodate a 2.57 MWp photovoltaic system consisting of 4,720 bifacial modules and 25 inverter units. The system is capable of generating 3,809 MWh/year with a performance ratio of 83.86%. Economic evaluation shows that the project is feasible with a levelized cost of energy of 0.0987 USD/kWh and a net present value of 1,437,413 USD. In addition, the system has the potential to reduce carbon emissions by 50,299.7 tCO₂ during its operational lifetime. Therefore, the implementation of a rooftop solar power plant at the Amamapare coal field area is considered technically reliable, economically feasible, and environmentally beneficial.
Co-Authors . Suwardi . Suwardi Abdul Khafid Adityarini, Devi Agus Subagio Agus Subagio Aini, Nabilah Aisyah, Ajeng Aulia Alivia Prima Laksmita Amni Z. Rahman Anang Setyo Pramudiyanto Ardiyanti Ardiyanti Arif Surahman Asmoro Widagdo, Asmoro Atang Sutandi Atin Temon Sari Bayu Pradika BERKAH FAJAR TAMTOMO KIONO Bima Adistya Della Widya Puspita Della Widya Puspita Demas Ahmad Resha Putra Hidayat Devi Adityarini Ditasya Putri, Novika Edi Purnomo Endah Dwi Hastuti Endah Dwi Hastuti Endang Saptiningsih Endang Saptiningsih Enita Simbolon Erma Prihastanti Erma Prihastanti Fella Suffah Meinaswati Fendy E. Wahyudi Fevi Mawadhah Putri H Hadiyanto Hida Kumalawati Ibnul Qoyim, Ibnul Iffa Illiyya Fatma Ika Shintya Imam Firmansyah Imam Firmansyah Imelda Anastasia Jafron Wasiq Hidayat Jaka Windarta Jumari Jumari Junita Junita Kasiyati Kurnianto, Ikhwan Zain Lily Nur Inda Sary Maliya, Ikhsanti Marcelinus Christwardana Mega Rizqi Utami Misrofah, Sofatu Misrofah, Sofatun Monica Dewi Sisca Mudlikatun Khasanah Muh Samsudin Muhadiono Muhadiono, Muhadiono Muhammad Farras Ilham Muhammad Rizaldi Zaman Munifatul Izzati Munifatul Izzati Nazaruddin Sinaga Ni Putu Tasya Savitri Nintya Setiari Nintya Setiari Noor Laila Safitri Noor Laila Safitri Novi Sultonia Farida Nurdiana Riska Nurrahmah Azizah Nurrahmah Azizah, Nurrahmah Nurul Hidayati Nurul Hidayati Nurul Hidayati Oktapianus Ala Olivia, Theresia Bianca Lucretia Peter Gell Purna Sulastya Putra Purna Sulastya Putra Putri, Marieshafa Salsabila Rachmad Setijadi, Rachmad Rafika Amalia Rahmat Setijadi, Rahmat Rasyid Abdulaziz Relita Aprisa Retno Puspitasari Retno Robiatul Al Adawiyah Riche Hariyati Rina Budi Astuti Rini Budihastuti Rizky Ramadhan Marlamsya Rofi'ana Rofi'ana Rofiqotul Khasanah Rully Rahadian Sarah, Solifa Sarjana Parman Sarjana Parman Satwika Paramasatya, Satwika Savitri, Ni Putu Tasya Septriono Hari Nugroho Septriono Hari Nugroho Silviana Silviana Siti Umi Shofiyatin Skolastika Dara Sabatini Skolastika Dara Sabatini Slamet Ifandi, Slamet Sofian, Arif Ardianto Sri Darmanti Sri Hariyati Sri Haryanti Sri Haryanti Sri Haryanti Sunarno Sunarno Surahman, Arif Theresia Bianca Lucretia Olivia Titi Nurul Oodriyyah, Titi Nurul Titi Nurul Qodriyyah Tri Retnaningsih Soeprobowati Udi Harmoko Valentino, Andreas Alvaro Widayat Widayat Widiartanto Widiartanto Yanty Yosephin Yogi Alamsah Yulita Nurchayati Zaenul Muhlisin Zaenul Muhlisin Zahrotunnisa, Alfi