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Journal : journal of environmental engineering and sustainable technology

OPTIMIZATION OF BIOGAS PRODUCTION FROM TOFU WASTEWATER Purwanti, Ani; Muchlis, Muchlis; Arbintarso, Ellyawan Setyo; Rahayu, Suparni Setyowati; Gusmarwani, Sri Rahayu; Pangestu, Muhammad Puri Dwi; Prayogo, Wisnu
Journal of Environmental Engineering and Sustainable Technology Vol 9, No 01 (2022)
Publisher : Directorate of Research and Community Service (DRPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2022.009.01.4

Abstract

The Seyegan tofu industry has increased the output of tofu wastewater, which has not yet been put to good use. Biogas can be created by mixing wastewater from the tofu business with waste from the cow feces industry. In this study, we measure the time of fermentation, the composition variation, and the rate of increase in gas pressure from the biogas generation process. Three versions with three repetitions each were used in this investigation. Three different variations were tested: one with a ratio of 20% cow excrement and 80% wastewater tofu industry, one with a ratio of 35% cow feces and 65% wastewater tofu industry, and one with a ratio of 50% cow feces and 50% wastewater tofu industry. Using a biogas reactor consisting of 120 L plastic drums, the experiment was conducted. Gas pressure (mm) was monitored with a water column and fermentation duration using a digital timer (hours). To ascertain the viscosity variance of each variation composition, a level test was conducted. By using the gravimetric approach, water. According to the study's findings, a 2.5 mm water column containing a mixture of 50% cow feces and 50% wastewater from the tofu business had the maximum gas pressure. The ideal ratio of mixed materials within 7 days has a significant impact on optimal biogas production.
ASSESSMENT OF TWO-WHEELED VEHICLE EMISSIONS IN THE VICINITY OF THE ENVIRONMENTAL ENGINEERING DEPARTMENT, UNIVERSITAS TADULAKO, INDONESIA Maulida, Fatimah; Mawaddah, Nurul; Zurfi, Alfian; Prayogo, Wisnu; Nur, Aulia Mustaqiman
Journal of Environmental Engineering and Sustainable Technology Vol 12, No 1 (2025)
Publisher : Directorate of Research and Community Service (DRPM)

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

Abstract

Two-wheeled motor vehicles are a major source of urban air pollution. This study investigates the emissions of carbon monoxide (CO) and hydrocarbons (HC) from motorcycles operating within the Environmental Engineering Department of Universitas Tadulako. Emission data were collected using direct measurements with an automotive emission analyzer across various motorcycles differing in age, fuel type, and engine condition. The findings reveal that, although the average emission levels generally meet the national standards (Ministerial Regulation No. 8/2023), motorcycles using lower-grade fuel (Pertalite) emit higher concentrations of CO and HC compared to those using higher-grade fuel (Pertamax). Furthermore, both CO and HC emissions increase with the age and mileage of the vehicle. The correlation analysis indicates that older vehicles and those with higher mileage tend to release more pollutants due to reduced engine efficiency. These results underscore the importance of regular vehicle maintenance, the use of higher-quality fuels, and awareness campaigns to reduce air pollution on campus. The study supports the development of environmentally friendly transportation policies within educational institutions. ASSESSMENT OF TWO-WHEELED VEHICLE EMISSIONS IN THE VICINITY OF THE ENVIRONMENTAL ENGINEERING DEPARTMENT, UNIVERSITAS TADULAKO, INDONESIA
Co-Authors Abda Abda Abdillah, Kurniawan Adi Susilo Aditya Prana Iswara Adri Firmansyah Aidil Candri, Dining Akmal, Ajmir Alexander Tunggul Sutanhaji Alfarishi, Bilal Aliyda, Fifi Alvan, Syahreza Andri Saputra Anggamulia, Muh. Ilham Ani Purwanti Aningtyas, Vebri Aprilia, Maya Arbintarso, Ellyawan Setyo Arwieny Hanami, Zarah Atika, Liana Aulia Annas Mufti Azahar, Ridho Azizah, Rifka Noor Bambang Winardi Buana, Dwinto Martri Aji Bukhary, Muhammad Al Cahya Alam, Firdha Chairina Zulfiani, Putri Chairunnisa, Nadda Khalila Cionita, Tezara Darwin Darwin Daudsyah Imami, Ahmad Daulay, Ilmi Alfiah Depri Dhifaf Athiyah Zhabiyan dian febrianti Dion Dion Awfa Emilia, Esi Erli Mutiara Ernindah Sormin Ersa, Nanda Safira Ersa, Nanda Savira Estim, Abentin Fajriharish Nur Awan, Fajriharish Nur Farizal, Teuku Fatahillah, Al Fiaqi Hamada, Ichi Fitria, Laili Fitriyana, Deni Fajar Ginting, Lioni Gabby Ella Br Gulo, Kanisius Delvin S Gultom, Tiara Gustinasari, Kiki Handana, Hindra Karamah Putra Harahap, Rumilla Harahap, Rumillah Hardoko Hardoko Hariyanto, Valentinus Lilik Harry Wibowo Haryana, Nila Reswari HASAN, NIA YUNIARTI Herdianti, Wenny Heri Gustami Hilman, Zaki Husaini, Muhammad Zakki I Wayan Koko Ihsan, Muhammad Faris Ikhwal, M. Faisi Ilham Nofri Yandra Imami, Ahmad Daudsyah Imelda Masni Juniaty Sianipar Imran, Al Ichlas Istiqomah Shariati Zamani Jamaluddin Jamaluddin Jaya, Ardino Wira Junaedi, Thomas Kahar Kahar, Kahar Kamal, Mushthofa Karina, Aisyah Makafta Kevin Maghrival Khairi, Alfin Khairuni, Zhili Izzadati Kristianto, Sonny Langgeng Setyono, Langgeng Luchmanandri, Rahmadini Lukman, Mena Fadillia M. Faisi Ikhwali M. Habib Algifari Mahadewi, Catherine Honey Marbun, Hanna Swesy Masruroh, Heni Maulida, Fatimah Mawaddah, Nurul Meisya Ruth, Gabriella Meisya Ruth Meylis Safriani Moh. Awaludin Adam Muchlis Muchlis Muhammad Amin Mujaroh Khotimah, Mujaroh Muklis Muklis Mustaqiman, Aulia Nur Nahesson Hotmarama Panjaitan Najmuddin MA, Najmuddin Najwa, Wardatun Napitu, Oktavianus Nastiti, Almira Davina Nasution, Muhammad Khairul Ikhsan Novrianty, Irma Nur Novilina Arifianingsih Nur Sakinah Nur, Aulia Mustaqiman Nurul Aulia Larasati Pangestu, Muhammad Puri Dwi Pasaribu, Hugo S. V. Prasetyo, Zulham Purnawan Purnawan Puspita, Rika Dona Putra, Riansyah Qadafi, Muammar Rachmat Mulyana Rahmadani, Sarra Rasyid, Galih Al Ratnaningsih, Wahyu Ridhosari, Betanti Rifka Noor Risti Rosmiati Rozanna Dewi Sahid Samsudin Anis Sari, Mega Mutiara Sarwa, Sarwa Septiariva, Iva Yenis Shabrina, Husna Muizzati Shofi Talbia, Husna Sidabutar, Daniel Mario Sihole, Arjuna Silaban, Gari Daniel Simanjuntak, Rizky Simanullang, Lillis Simaremare, Yessika Angelina Sinaga, Tiur Sari Tua Siregar, Januar Parlaungan Sitompul, Astrid Sitorus, Heri Franata Sofiyah, Evi Siti Sri Rahayu Gusmarwani, Sri Rahayu Sri Sunarsih Sugianto Prabowo Rahardjo, Seto Suhardono, Sapta Suparni Setyowati Rahayu Suryawan, I Wayan Koko Teguh Budi Prijanto, Teguh Budi Tia Dwi Irawandani Tinov, Naufal Tio Katarina Marpaung Trimailuzi Trimailuzi, Trimailuzi Tuti Mutia Ulhasanah, Nova Ulya Bunga, Venny Uma Fadzilia Arifin, Uma Fadzilia Wesli Wesli Widiatama, Angga Jati Wijayanto, Etanto Heiliano Yasa Palaguna Umar, Yasa Palaguna Yuni Yolanda Yusrizal, Teuku Zakia Zakia Zhilli Izzadati Khairuni Zubir, Moondra Zurfi, Alfian