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All Journal Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Jurnal Natur Indonesia Jurnal Ilmu Lingkungan Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Bulletin of Electrical Engineering and Informatics Jurnal Online Mahasiswa (JOM) Bidang Keguruan dan Ilmu Pendidikan Journal of Degraded and Mining Lands Management Jurnal Pembangunan dan Alam Lestari Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Pendidikan Biologi Indonesia Edufisika: Jurnal Pendidikan Fisika E-Dimas: Jurnal Pengabdian kepada Masyarakat Jurnal Pendidikan Biologi International Research Journal of Business Studies (E-Journal) Proceedings of the 1st UR International Conference on Educational Sciences Jurnal Analisis Sosial Politik Riau Journal of Empowerment Bioedukasi: Jurnal Pendidikan Biologi JURNAL PENDIDIKAN TAMBUSAI Bio-Lectura Gelar : Jurnal Seni Budaya Khazanah: Jurnal Pengembangan Kearsipan Jurnal Hilirisasi IPTEKS (JHI) Logic : Jurnal Rancang Bangun dan Teknologi Journal of Sylva Indonesiana Jurnal Kebidanan Harapan Ibu Pekalongan Unri Conference Series: Community Engagement Jurnal Zona Devotion: Journal of Research and Community Service Open Access Indonesian Journal of Medical Reviews BIOGENESIS NUSRA: Jurnal Penelitian dan Ilmu Pendidikan Journal of Educational Sciences Jurnal Ilmu-Ilmu Kehutanan Jurnal Ilmu Akuntansi Mulawarman (JIAM) Jurnal Green Growth dan Manajemen Lingkungan Eduvest - Journal of Universal Studies EcoNews Prosiding Seminar Nasional Hasil Penelitian dan Pengabdian Kepada Masyarakat Management of Information System Journal INERSIA International Research Journal of Business Studies (Journal of Environmental Sustainability Management) PESHUM Galen: Jurnal Ilmu Farmasi dan Kesehatan
Suwondo Suwondo
Universitas Riau
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Optimizing tilt angle of the roof for the best performance ratio of rooftop photovoltaic Dani Ali, Nurhalim; Bahri, Syaiful; Ikhwan Siregar, Yusni; Suwondo, Suwondo; Anhar, Anhar; Lysbetti Marpaung, Noveri; Muhammad, Juandi; Hasyim Rosma, Iswadi
Bulletin of Electrical Engineering and Informatics Vol 14, No 6: December 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v14i6.11126

Abstract

Rooftop photovoltaic (RPV) systems are becoming increasingly popular as a source of renewable energy. One key factor that significantly affects the performance of RPV systems is the tilt angle of the solar panels. This study aims to determine the optimal tilt angle to maximize electricity production for the RPV system installed on academic building, Department of Electrical Engineering, Faculty of Engineering, University of Riau. The research method used is the PVSyst simulation. The simulation data input was used as daily weather for one year. In this study, variations in roof tilt angles of 5°, 10°, 15°, 20°, and 25° were examined. The results show that the optimal tilt angles for this location are 5° and 10°. At a 5° tilt angle, the RPV can generate 247,128 kWh per year with a performance ratio (PR) of 83%. And then at a 10° tilt angle, the system can generate 248,012 kWh per year with a PR of 82%. Based on the simulation results, other tilt angles also produced higher energy outputs but yielded lower PR values. This study provides practical recommendations for designing RPV systems in regions with similar weather conditions.
Menilai Pemulihan Ekologis: Analisis Ekonomi Lingkungan terhadap Remediasi Tanah Terkontaminasi Minyak di Hutan Hujan Tropis Lubis, Abdillah; Bahruddin; Suwondo; Efriyeldi
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 15 No 6 (2025): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.15.6.1073

Abstract

The hydrocarbon contamination affects approximately 5.9 ha of soil in Sultan Syarif Hasyim Grand Forest Park (Tahura SSH), a tropical rainforest in Riau Province, Indonesia. This study aims to determine the costs required to rehabilitate petroleum-contaminated soil and evaluate the economic significance of ecological restoration in a 5.9 ha area designated in Tahura SSH. This study provides a novel economic framework for assessing ecological damage and guiding recovery in a hydrocarbon-impacted area, integrating the Replacement Cost Method (RCM) through restoration cost calculations and the Resource Equivalence Analysis (REA) to assess and compensate for environmental damage-related losses. The study results show that the three main remediation technologies selected, bioventing, bioaugmentation & biostimulation, and ex-situ landfarming, were used to remediate oil-contaminated soil in Tahura SSH. The highest remediation costs are exsitu landfarming, followed by bioaugmentation and biostimulation, and then bioventing. The ex-situ land farming method incurred the highest remediation costs. Nevertheless, it causes ecological harm in the SSH Tahura Area. REA determined that the area required to replace oil-contaminated land should be twice the baseline from 5.9 ha to 12.8 ha. Furthermore, the compensation paid by REA for environmental damage exceeded the initial assessment by 116.1% compared to using the Replacement Cost Method (Bioaugmentation & Biostimulation, Bioventing, and Ex-Situ Landfarming). This study offers stakeholders guidance on determining a fair environmental value for oil-contaminated soil. Future studies 
The dynamics of traditional gold mining on customary land: Between local wisdom and the pressure of illegal gold mining Nurafni, Melia; Siregar, Yusni Ihwan; Suwondo, Suwondo; Gusliana , HB
Journal of Degraded and Mining Lands Management Vol. 13 No. 2 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.132.9787

Abstract

Customary land is an essential asset for indigenous communities and a primary source of livelihood. In recent years, however, traditional gold mining has become increasingly threatened by the emergence of artisanal and small-scale gold mining (ASGM) activities within customary areas. This study aimed to analyse the dynamics of traditional gold mining on customary land and to examine the local wisdom values that support conservation. Data were collected through observation and in-depth interviews. Changes in land cover were measured using the area calculation method through post-classification area statistics techniques in a Geographic Information System (GIS), and the data were analysed using qualitative descriptive methods. The findings showed that: (1) the utilization of customary land for traditional gold mining has progressively declined as a result of land-use conversion. The dynamics experienced by the Indigenous community illustrate a process of commons enclosure, in which customary land as a communal resource has increasingly been transformed into privatized or commercialized space through rental mechanisms, thereby causing traditional gold panners to lose access to their customary living and working spaces; and (2) local wisdom practices embedded in traditional gold panning contribute to ecosystem conservation. These values include: (a) the philosophy of “not being greedy,” (b) the use of simple technology, namely wooden pans (ethno-technology), (c) shallow surface excavation, (d) gold separation through the panning motion without mercury, and (e) a subsistence-oriented ethic associated with gold panning as a livelihood source.
Rancangan E-Magazine Keanekaragaman Makrofauna Tanah di Perkebunan Karet Desa Petani Pada Materi Ekosistem SMA Kelas X Reni Febriani; Fitra Suzanti; Suwondo Suwondo
PESHUM : Jurnal Pendidikan, Sosial dan Humaniora Vol. 5 No. 3: April 2026
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/peshum.v5i3.13987

Abstract

Penelitian ini bertujuan untuk mengetahui validitas rancangan E-Magazine Keanekaragaman Makrofauna Tanah pada materi ekosistem kelas X SMA. Metode penelitian menggunakan deskriptif kuantitatif dengan model pengembangan ADDIE yang meliputi tahap Analyze, Design, Development, Implement, dan Evaluation, namun pengembangan E-Magazine dilakukan hanya sampai tahap Development. Perancangan dilaksanakan di Kampus Program Studi Biologi Fakultas Keguruan dan Ilmu Pendidikan Bina Widya Universitas Riau Panam Pekanbaru. Produk E-Magazine yang telah dikembangkan divalidasi oleh dua validator, yaitu ahli media dan ahli materi. Penilaian validitas mengacu pada empat aspek, yaitu aspek isi, bahasa, penyajian, dan kegrafisan. Hasil validasi menunjukkan bahwa E-Magazine memperoleh skor rata-rata 3,89 sehingga termasuk dalam kategori sangat valid dan layak digunakan sebagai sumber belajar pada materi ekosistem SMA kelas X fase E.
Strategi Potensi Pengurangan Emisi Karbon dari Aktivitas Perkebunan dan Pabrik Kelapa Sawit Muhammad Abil Khausa; Suwondo Suwondo; Eni Sumiarsih
Jurnal Zona Vol 10, No 1 (2026)
Publisher : Pelantar Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52364/zona.v10i1.239

Abstract

The potential for carbon emission reductions from palm oil plantation and mill activities at PT Perkebunan Nusantara IV Region III represents a critical contribution to Indonesia's national commitment to achieving Net Zero Emissions by 2060. Operational activities—including fuel combustion in heavy machinery, generator utilization, fertilization, electricity consumption, and liquid waste treatment through Palm Oil Mill Effluent (POME) contribute significantly to greenhouse gas (GHG) emissions, particularly carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O). This study employs a quantitative approach grounded in SNI ISO 14064-1:2018, systematically calculating emissions under Scope 1, Scope 2, and partial Scope 3 categories across three operational units: Lubuk Dalam, Terantam, and Sei Pagar. The findings reveal that mobile combustion constitutes the largest emission source, followed by stationary combustion, fertilization activities, and fugitive emissions derived from POME processing. Among the three units examined, the Terantam unit generates the highest total emissions. Further analysis demonstrates that the utilization of biogas (CH₄) recovered from POME holds substantial energy generation potential, capable of producing 950,174 kWh at Lubuk Dalam, 1,929,734 kWh at Terantam, and 880,749 kWh at Sei Pagar, with an aggregate economic value exceeding Rp 4 billion annually. Based on these findings, three principal mitigation strategies were formulated: substituting diesel-powered generators with grid electricity supplied by PLN, transitioning heavy equipment to electric-based technology, and optimizing biogas utilization for electricity generation. These strategies demonstrate significant potential not only in reducing CO₂ equivalent (CO₂e) emissions but also in enhancing energy efficiency and advancing the long-term operational sustainability of the company
Proses akuntansi pengelolaan dana jimpitan Suwondo, Suwondo; Iskandar, Rusdiah; Lahjie, Annisa Abubakar
Jurnal Ilmu Akuntansi Mulawarman (JIAM) Vol. 6 No. 3 (2021): September
Publisher : Fakultas Ekonomi dan Bisnis Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29264/jiam.v6i3.6864

Abstract

Tujuan penelitian ini adalah untuk mengetahui proses akuntansi pada pengelolaan dana jimpitan Kelurahan Lempake Kecamatan Samarinda Utara RT. 19. Penelitian ini termasuk jenis penelitian kualitatif deskriptif  yang digunakan untuk mengetahui proses akuntansi. Data yang digunakan data sekunder dan data primer, teknik pengumpulan data menggunakan metode wawancara, dokumentasi, dan studi kepustakaan. Penelitian ini bermanfaat bagi Kelurahan Lempake Kecamatan Samarinda Utara sebagai masukan mengenai proses akuntansi yang sebaiknya dilaksanakan, dan bermanfaat bagi pihak lain sebagai sumber informasi mengenai proses akuntansi yang dilaksanakan pada Institusi jimpitan  RT. 19 di Kelurahan Lempake Kecamatan Samarinda Utara. Hasil penelitian menunjukan bahwa proses akuntansi pada pengelolaan dana jimpitan Kelurahan Lempake Kecamatan Samarinda Utara  RT. 19 belum sesuai dengan siklus akuntansi. Hal ini dapat dilihat dari proses akuntansi (Menganalisis dan mencatat transaksi-transaksi ke dalam jurnal, Posting transaksi tersebut ke buku besar, Menyiapkan daftar saldo yang belum disesuaikan, Menyiapkan dan menganalisis data penyesuaian, Menyiapkan kertas kerja akhir periode (opsional), Membuat ayat jurnal penyesuaian dan posting ke buku besar, Menyiapkan daftar saldo yang disesuaikan, Menyiapkan laporan keuangan, Membuat ayat jurnal penutup dan posting ke buku besar, dan Menyiapkan daftar saldo setelah penutup). Proses akuntansi yang dilaksanakan oleh pengelolaan dana jimpitan Kelurahan Lempake Kecamatan Samarinda Utara RT. 19 belum sesuai dengan Standar Akuntansi Keuangan yang berlaku. Hal ini disebabkan oleh pengetahuan proses akuntansi yang dimiliki oleh Institusi jimpitan terbatas.
Sikap Ilmiah dan Kreativitas Produk pada Isu Lingkungan melalui Pembelajaran Berbasiskan Proyek YUSTINA, YUSTINA; SUWONDO, SUWONDO
Bioedukasi: Jurnal Pendidikan Biologi Vol 8, No 2 (2015): Bioedukasi: Jurnal Pendidikan Biologi
Publisher : Department of Biology Education Faculty of Teacher Training and Education Sebelas Maret Un

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/bioedukasi-uns.v8i2.3876

Abstract

The purpose of this research was to got the information about student’s scientific attitude and creativity of product and correlation both of it in enviromental issues through project based learning. This research was conducted from January to June 2015. Sample in this research are 34 students of 2014 grade in FKIP Biologi UR used parameters are (1) scientific attitude with 4 indicators (curiosity, cooperative, carefulness and discipline); (2) creativity of product. Observation instrument managed by reseacher and the realibility values based Alfa Cronbach is 0.70-0.87. The creativity was scored through product (report) by using portofolio instrument, with descriptors are : Initiative (collecting information), inovation (environmental issues that are happening), variation of idea (way of display data), and suitable idea and their solution. The data analyzed is using SPSS. Descriptive statistic are percent, mean, standard deviation and inference statistic (Multiple regretion). Mean values shows us that student’s scientific attitude is 79,99 (good), and the creativity of product is 80,10 (good). Positive correlation among curiosity, cooperation, carefulness and discipline give contribution as 68% to determine the creativity of product. Separately, each aspect of student’s scientific attitude give contribution for creativity of product are : curiosity (60%), carefulness (57%), discipline (48%) and cooperative (47%). The conclusion is student’s scientific attitude and creativity of product is in good category, It mean was there are correlation between student’s scientific attitude and the creativity of product in environmental issues through project based learning in FKIP Biologi UR.
Analysis of the Implementation of Bioaugmentation in the Remediation of Petroleum-Contaminated Soils in Oil and Gas Exploration Areas Tengku Fachrur Reza; Budijono Budijono; Suwondo Suwondo
Eduvest - Journal of Universal Studies Vol. 6 No. 7 (2026): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v6i7.53105

Abstract

This study analyzes the impact of ecological remediation through bioaugmentation techniques to remediate crude oil-contaminated soil and its social and economic implications in Siak Regency, Riau Province. Oil contamination caused by leakage due to illegal tapping of oil pipelines has become a serious environmental issue requiring effective and sustainable remediation methods. This study aims to evaluate the effectiveness of bioaugmentation in reducing long-chain petroleum hydrocarbons (C10–C36) to meet environmental quality standards while also assessing the social and economic impacts of its implementation. A mixed-methods approach was applied, combining quantitative analysis of laboratory test results and environmental monitoring with qualitative surveys and interviews involving communities, government agencies, and companies. The results show that bioaugmentation using indigenous bacteria significantly reduced petroleum hydrocarbon concentrations from 8.4%–9.4% to below the environmental quality standard (≤0.1%) within 5–6 weeks. The most efficient dosage was found to be 1 liter/m³ of contaminated soil, as it achieved degradation rates comparable to those of 2 liters/m³ but with lower operational costs. Environmental conditions during remediation remained optimal for microbial activity, with a pH of 6.0–6.9, a temperature of 26–36 °C, and humidity of around 70%. Socially and economically, the implementation received positive responses, although community satisfaction was slightly lower than that of government agencies and companies. Overall, bioaugmentation was proven to be an effective, economical, and environmentally friendly remediation technology for the sustainable recovery of crude oil-contaminated soil.
PENGEMBANGAN PETA POTENSI DESA BERBASIS SPASIAL UNTUK MENDUKUNG PERENCANAAN PEMBANGUNAN DESA DI KECAMATAN BUNGA RAYA KABUPATEN SIAK Suwondo Suwondo; Almasdi Syahza; Musrifin Galib; Reby Oktarianda
Jurnal Hilirisasi IPTEKS Vol. 3 No. 2 (2020)
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jhi.v3i2.436

Abstract

Village development planning requires information in the form of spatial data that is precise and accurate so that it can be used to analyze development needs in environmental, economic, and social aspects. It shows the limited spatial information related to village administration, village potential, and toponymy. The development of a spatial-based village potential map aims to present spatial information to be used in village development planning. The spatial map was developed through a participatory approach by involving Riau University students. Data collection was carried out with multi parties' participation, including the Geospatial Information Agency, Siak Regency Government, LPPM Riau University, and the World Research Institute. The method of developing spatial maps is done using the Avenza Maps application based on android and Arc Gis. The activity was carried out in Bunga Raya District, Siak Regency. Development activities are carried out through the stages of preparation (identification of needs and training), implementation (field mapping), and evaluation (making village spatial maps and verification). The results of developing a spatial-based village potential map showed promising results. The preparation stage resulted in identifying the components needed, such as base maps, developing student human resources by conducting training on using the Avenza Maps application. The implementation stage produces spatial coordinates of the village potential through participatory field surveys between Riau University students and the District's community/village apparatus. The evaluation stage produces spatial maps that have been verified by the Siak Regency Government, especially the village administrative boundaries. Thus, spatial mapping results can be used as a database in development planning and can be used as a baseline for spatial data for Siak Regency.
Analysis of Biological Science Literacy Ability of Students’ Grade IX at Ujung Batu Junior High Schools Ayu Andira; Suwondo Suwondo; Wan Syafi’i
Journal of Educational Sciences Vol. 6 No. 1 (2022): Journal of Educational Sciences
Publisher : FKIP - Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jes.6.1.p.171-180

Abstract

The purpose of this research is to analyze the biological science literacy ability of students’ grade IX at Ujung Batu Junior High Schools. Students’ biological science literacy abilities are affected by many things, such as untrained students’ to solve characteristic questions such as the questions on PISA. This research used a descriptive method with a quantitative approach. The instrument used to capture students’ biological science literacy ability is a test. The research conducted at Ujung Batu Junior High Schools Accredited “A” population distributed in three schools with the population in this study was all the students in grade IX at Ujung Batu Junior High Schools in the 2019/2020 academic year. The Sampling technique used in this research is simple random sampling. The comprehensive scientific literacy score is 69.15, which is in the middle level. Based on aspects of scientific literacy (1) science content, amounted to 71.18 medium categories; (2) science process, 59.73 medium categories and (3) science context, 76.53 medium categories. The research conclusion is that there is a different capacity of students’ biological science literacy after using test questions on students’ scientific literacy ability.
Co-Authors ', Darmadi ', Yustina 1Ridwan Manda Putra Abdillah Lbs Abdillah Lbs Adriana Priharwanti Afrianti, Delvi Agus Budiono, Agus Ahmad Kurnain Almasdi Syahza Alwysihah, Hafid Andri Hendrizal Anhar Anhar Annisa Abubakar Lahjie Antoni Antoni Ariani, Dwi Arum Sekar Wulandari Asmura, Jacky Astalini Astalini Atang Sutandi Atika Azharo Atika Azharo Ayu Andira Ayu Andira Azizah, Sundus Ghaida Noor Bahruddin Bambang Paramudya Besri Nasrul Bintal Amin Bochari - Budi, Idul Fitra Budijono, Budijono Chatarina Umbul Wahyuni Dani Ali, Nurhalim Darmadi Darmadi Ahmad Darmaji, Darmaji Darmawan Purba Delis Lesnawati Destiranda, Eko Deswati Deswati Deswati Deswati Dewi Amina, Nia Ditasari, Kania Efriyeldi, Efriyeldi Elya Febrita Elya Febrita Febrita, Elya Febrita Endang Arisoesilaningsih Eni Sumiarsih Evi Suryawati Evi Suryawati Evi Suryawati Suryawati, Evi Suryawati Fadillah , Muhammad Hasnan Fauzi, M. Irsyad Firdaus LN Fitra Suzanti Gita Melisa Yolanda Gita Melisa Yolanda Gun Faisal Gunawan, Fachrul Gusliana , HB Gustriani, Riah Heriwati, S H Hidayat, Dimas Bayu Husna, Rizqa Alfajri I Gusti Bagus Wiksuana Imam Suprayogi Irdika Mansur istiqomah istiqomah Istiqomah Istiqomah Jacky Asmura Jacky Asmura Jaya Maulana Joleha, Joleha Juandi Juandi Krisyunianto, Andi Kurnia Khairi Khairi, Kurnia Khairi L.N Firdaus L.N Firdaus, L.N Firdaus L.N. Firdaus, L.N. Firdaus Lesnawati, Delis Lubis, Abdillah Lysbetti Marpaung, Noveri M Yunus Mariani Natalina Meilianti, Dasni Elsa Meliana Meliana Muhammad Abil Khausa Muhammad Amin Muhammad Rizki Musrifin Galib Myrna, Rena Nadia Qotrunnada Nafian, Muhammad Nisa, Nova Khoirun Nizwardi Jalinus Nofrizal Nofrizal Nofrizal Nofrizal Nurafni, Melia Nurhasanah Nursal Nursal, Nursal Nurwijayanti Oktama R, Dhea Oshi Handayani, Oshi Panindias, A N Pendrice Pendrice Pendrice, Pendrice Perdana, Ramadhani Fajar Pratiwi, Dewi Anggi Prilosadoso, B H Pujiono, B Rakhman , Rizali Rama, Ance Gusti Reby Oktarianda Reby Oktarianda Reni Febriani Rezalia Eka Putri Ridwan Manda Putra Rika Az Zahrawani Risaundi, Dodi Ristiawati Rosma, Iswadi Hasyim Rosnita Rosnita Rosnita Rosnita Rudy Haryanto Rusdiah Iskandar Sagita, Romi Salmiah, Ananda Sandria, Jeky Sanjaya, Edi Sari, Dwi Eliana Setiawan, R. Razak Shafa, Dias Silaban, Maya Ismay Siregar , Elisa Weber Siregar, Yusni Ihwan Siti SITI AISAH Solikin, Muhammad Sri Indarti Sri Wulandari Sri Wulandari Sri Wulandari SRI WULANDARI Sumardjo Syafi’i, Wan SYAIFUL BAHRI Teguh Irawan Tengku Fachrur Reza Ucin Muksin, Ucin Usman Muhammad Tang Wan Syafii Wan Syafi’i Wardhany, Farydha Sophia Waskito Waskito, Waskito Widodo, Teguh Sugeng Rahayu Yuslim Fauziah Yusni Ikhwan Siregar Yustina Yustina