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Journal : INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY

ASSESSMENT OF CARBON EMISSIONS FROM THE WASTE MANAGEMENT SECTOR IN AJATAPPARENG REGION, SOUTH SULAWESI, INDONESIA Rahim, Irwan Ridwan; Sari, Kartika; Mukrim, Muhammad Ihsan Mukrim; Iman, Alfiyah Zhafirah; Taweesan, Achara; Swe, Zin Aung
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 8, NUMBER 2, OCTOBER 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v8i2.24071

Abstract

Ajatappareng is a region in South Sulawesi Province, Indonesia which consists of four regencies and one administrative city. The regencies are Barru, Sidenreng Rappang, Pinrang, and Enrekang while the city is Parepare. The area has experienced a significant growth in terms of population which further leads to an increase in waste generation. Waste are a major challenge for environmental management especially due to the role in producing carbon emissions.  Aim: This study aims to assess the carbon emissions produced in waste management sector of the Ajatappareng Region. Methodology and results: The GHG Simulation-Version II spreadsheet was used to assess the GHG emissions from the transportation of waste in the respective regencies. Mathematical formulas were provided in the cells to calculate the GHG emissions of the simulation developed. Conclusion, significance, and impact study: The results showed that the volume of carbon emissions was 16,299.84 kg CO2-eq/month for Barru Regency, 17,076.03 kg CO2-eq/month for Sidrap Regency, 16,817.30 kg CO2-eq/month for Parepare City, 17,722.85 kg CO2-eq/month for Pinrang Regency, and 19,145.85 kg CO2-eq/month for Enrekang Regency. Moreover, the GHG emissions from mixed waste in the final disposal site were 918,531.01 kg CO2-eq/month, 1,733,537.85 kg CO2-eq/month, 1,404,917.59 kg CO2-eq/month, 1,723,004.12 kg CO2-eq/month, and 523,506.36 kg CO2-eq/month, respectively. Therefore, potential efforts are required to reduce CO2 emissions by optimizing waste transportation, promoting recycling, managing organic waste through composting, as well as improving collaborations with the private sector.
INVESTIGATING FLY ASH-BOTTOM ASH-SOIL COMPOSITE AS SUSTAINABLE LINERS FOR URBAN LANDFILLS: GEOTECHNICAL AND ADSORPTION ASSESSMENT Sari, Kartika; Ridwan, Irwan; T. Lando, Asiyanthi; Nur, Sitti Hijraini; Zayarati, Mehdi Tanha
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 8, NUMBER 2, OCTOBER 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v8i2.24117

Abstract

This study investigates the combination of Fly Ash (FA), Bottom Ash (BA), and Soil (S) as a potential bottom liner in landfills. It is expected to cover the need for sustainable environmental technology, maintain structural strength, and prevent heavy metal pollution in rapidly urbanizing areas, while considering problems related to urban waste management. Aim: Evaluate FABA-Soil mixture as an alternative bottom liner material in landfill by assessing geotechnical performance and Cadmium (Cd) adsorption capacity. Methodology and results: The research explores two issues: mechanical stability (specific gravity, void ratio, compaction, and permeability) and mitigating Cadmium contamination from landfill leachate. Four mixture compositions (FBS1-FBS4), 15%, 30%, 50%, and 65% FABA content, were tested. Laboratory tests are conducted, including compaction, permeability, and adsorption continuous column tests. The results showed that intermediate FABA content (FBS2 and FBS3) may have stronger mechanical stability compared to others. For permeability, all values exceeded the regulatory standard. In the case of adsorption capacity, all compositions effectively removed Cd from the leachate. Conclusion, significance, and the impact study: Results on void ratio (e) and maximum dry density (MDD) suggested that a suitable mixture design may enhance long-term mechanical performance under a normal urban landfill loading situation. The FABA-soil mixture shows promise as an alternative landfill liner in moderate proportions and demonstrates excellent adsorption of heavy metals. All the attributes support general objectives of sustainable urban development and circular resource management, align with sustainable cities and communities, and responsible consumption and production.  
Co-Authors Abdul Malik Adha, Fauzia Aulia Adi Heri Adlian, Adlian Afifah, Irma Afriani Afriani Agestianti, Ruth Agung Bambang Setio Utomo Agustia, Yesi Akyun, Suri Alawiyah, Isnaini Alindra, Afridha Laily Aliyya, Sofie Azzahra Amalia Rahmawati Aminuddin, Jamrud Ananda, Muharam Rizqi Andy Wijaya Anggia, Yosi Anjeli Kusuma Wijayanti Anna Mardiana Handayani Annisa Amalia Annisa Annisa Arief Rahman Arum Sulistyani, Arum Asmukyati, Yati Asyriah, Nor Aulia, Muhammad Avizza, Pinkan Ledy Ayu, Putri Azhar, Sahari Azhari, Ichwan Azian M. Safan A’yun, Nidha Aulia Qurrata Bahri, Muhammad Syamsul Baiti, Nurul Banyuriatiga Banyuriatiga Bilalodin Bilalodin Budi Utomo, Agung Bambang Candrasuari, Ni Luh Putu Diah Ayu Cucu Suhery Dahlia Dahlia Dari, Qorinah Wulan DEWI SARTIKA Edi Surya, Edi Emmawati, Aswita Eppang, Yudiarsi Era Sonita Evi Yulianti Fahira, Rachyana faradina, Syarifah Frischila Barnabas , Yuni Hafiz Muhardi Halifah , Rofikoh Hamka Hamka, Hamka Hasna Heryn Mandala Putri Hirzen Hasfani Huda, Nur'ainul Miftahul I WAYAN SUMARJAYA Ikhwan Ruslianto Iman, Alfiyah Zhafirah Imro'ah, Nurfitri Indah Emilia Wijayanti Indriati, Marlinda ISHAK Ishak, Maulana ISKANDAR Isnen, Yazid Zainur Jatmiko Susilo Jazaul Husna Joni, Yefri Junaidi, Win Juriana Juriana Kafriandeni, Okhari Kasliono Khaerunnisa, Hanie Khoryanton, Ampala Kiki Wahyuni Kiking Ritarwan Kms. Muhammad Amin Fauzi L. Tobing, Rangga Lestari, Nurul Khofifah Lintang Wening Pembayun Lumban Toruan, Parmin Mahardika, Nanda Rizky Mardiansah, Rifki Marisa Midyanti, Dwi Marjohan, Masno Marlina Ekawaty Marmawi R . Marty Mawarpury Maulida Rachmawati Maulidina, Rifatul Maya Khairani Ma’arif, Iin Baroroh Muhammad Ihsan Mulfira firnanda Munawar Ismail Munawwarah, Hidayati Musyarofah, Anna muwaffaq, Abiyyu Sayyid Nabella, Rihana Sofie Nabila, Syifa Nabilah, Azmi Nafira, Annisa Ni Ketut Tari Tastrawati Nirmala, Irma Nita Amalia Nur Azizah Novita Sari Nur Rahmawati Nurdina Rasjid Nurhaliza, Yunia Nurjihan, Tara Nurmala, Riska Nurul Badriyah Nur’aisyah, Salsadilla Siti Oryza Sativa Pajar Pasaribu, Rosidah Minta Ito Praktino, Budi Prayuda, Herry Purba, Jenny Marlindawani Putri Dahlia Febiyola Putri Soraiya, Putri Radeetha, Radeetha Rahim, Irwan Ridwan Rahma, Aulia Fathiya Rahmi Hidayati Randily, Dhea Ramadhanti Putri Rangkuti, Ilhan Rayfatsyah Ratna Dewi Rialdi, Azzahra Putri Ridwan, Irwan Rina Mardiana Rini Susanti Risana Rachmatan Rizky Maulana, Rizky Rohmaniyah, Rohmaniyah Rosmana, Primanita Sholihah Rosmiati , Meiti Rosy Hutami Rusli Yusuf Ruswan, Acep S. Sugiharto Sampurnaningsih, Sri Retnaning Saragih, Emi Juwita Saragih, Rosvilani Sari, Adinda Fuspita Septian, Tegar Tri Setiabudi , Angga Setiawan, Feri Setyo Tri Wahyudi Sihombing, Evi Ariyanti Marlina Siregar, DELisma Siti Haryani Siti Sarah, Siti Sitti Hijraini Nur Solly Aryza Sugiarti, Endang Suhardi Sulasmi Sulasmi Sunardi Sunardi susanti, septria Suwanty, Erina Suyida, Nasywa Alifah Swe, Zin Aung syaddam, syaddam Syamsul Bahri Syarifah Syarifah, Syarifah T. Lando, Asiyanthi Tanjung, Zakiatul Hasanah Taweesan, Achara Tedy Rismawan Tomana, Josef Tutuk Ningsih Uray Ristian Warso Warso, Warso wati, Hasnidar Wildansyah lubis, Wildansyah Winara, Winara Wulandari, Siti Oktavia Zaujatul Amna, Zaujatul Zayarati, Mehdi Tanha