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All Journal Jurnal Silvikultur Tropika (JST) Jurnal Agro Teknologi Tropika PEST Tropical Journal JURNAL PERBENIHAN TANAMAN HUTAN Jurnal Online Mahasiswa (JOM) Bidang Pertanian Jurnal Riset Industri Hasil Hutan Jurnal Biologi Tropis JURNAL EDUCATION AND DEVELOPMENT Jurnal Pembelajaran dan Biologi Nukleus ULIN: Jurnal Hutan Tropis Journal of Forest Science Avicennia Indigenous Biologi Sagu Jurnal Pengabdian Masyarakat Bidang Sains dan Teknologi Jurnal Ilmu-Ilmu Kehutanan Aceh International Journal of Science and Technology Jurnal Pengabdian Masyarakat Bangsa Leuser Journal of Environmental Studies
Muhammad Mardhiansyah
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Journal : Leuser Journal of Environmental Studies

 1 
Utilization of Empty Palm Fruit Bunches as a Carbon Source for Cellulase Production to Reduce Solid Waste from Palm Oil Amraini, Said Zul; Nazaris, Nazsha Nayyazsha; Andrio, David; Mardhiansyah, Muhammad; Helwani, Zuchra
Leuser Journal of Environmental Studies Vol. 1 No. 1 (2023): July 2023
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/ljes.v1i1.41

Abstract

Cellulase enzymes are widely used in textile, food, detergent, pulp and paper industries and biofuel, so the need for enzymes continues to increase every year. One of many biomass wastes found in Indonesia is empty fruit bunches (EFB) that can be used as a carbon source as a substitute for expensive pure cellulose (CMC) and Bacillus subtilis isolates. This study aims to obtain the optimum conditions the production of cellulase enzymes with variations in the pre-treatment of EFB and pH variations of the medium using Bacillus subtilis. Pre-treatment was carried out to hydrolysed lignocellulosic biomass was more easily and increased glucose levels which would enter the next production stage. Variations in pre-treatment were carried out by adding acids, bases and organosolv process, as well as variations in pH at 6.5; 7.0 and 7.5, respectively. Enzyme activity was calculated using the Nelson-Somogyi method. When using acid, the enzyme activity is 0.041, while using organosolv, it is obtained 0.057 each at pH 7. The results showed that the highest enzyme activity was obtained at a pH of 7.0 and a temperature of 40 ºC on EFB substrate pretreated with a base of 0.204 U/ml. These findings emphasize the potential benefits of using EFB waste as a substrate for cellulase enzyme production, by providing an alternative approach to decrease raw material expenses and mitigate environmental pollution.
Evaluating the Effectiveness of Community-Based Mangrove Rehabilitation Initiatives Mardhiansyah, Muhammad; Suhada, Nur; Sribudiani, Evi; Amraini, Said Zul; Farhan, Hafid
Leuser Journal of Environmental Studies Vol. 3 No. 1 (2025): April 2025
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/ljes.v3i1.257

Abstract

Management actions through rehabilitation activities can restore mangrove ecosystems by involving community participation. This study aims to determine the involvement and effectiveness of community-based rehabilitation activities. This study was conducted in Teluk Pambang Village, Bengkalis Regency. The method used is qualitative, with a purposive sampling technique based on certain criteria. The data analysis used is qualitative descriptive and data processing using nvivo 12 plus software. The research findings explain that the dominant factors that encourage people to carry out mangrove rehabilitation activities are based on additional income, strengthening the issue of carbon trade economy, kinship elements, and easy access to financing through donors. The level of program understanding, target accuracy, activity management, and real changes are the most effective rehabilitation activities for the community. At the same time, the indicators for achieving goals are still considered ineffective.
Co-Authors ', Annisa ', Juliati , Khairilkasdi Adhiatma, Muhammad Jaya Aditia, Windy Sukma Agus Setiawan Akhmad Rafdi Azhimi Alpino Alpino Alpino Amrad Rabbani Piliang Anas Ritonga Andilau Andilau Andilau Andilau, Andilau Andrian Sianturi Andrian Sianturi Aprianto, M. Ikhsan Ardho, Ardho Ardiansyah Arida Susilowati Iswanto Arie Febriyan Rianto Arifin A.R. Manurung Ariska Yuliana Putri Ariska Yuliana Putri Arsetia, Dini Aulia R. Arta Pansiska T Asprizatul Azlan Astuti, Riya Aulia Sari Azis Gunawan Bakara, Jhon Pontas Binton Harianto purba Budiani, Evi Sri Budiani, Evi Sri Cahyani, Putri Charlita Herantoro Pribadi Cindy Melky Utami Citra Helen Patras Purba Dame R Pakpahan Darli, Viny Volcherina David Andrio Dede Komala Sari Dede Komala Sari Deden Syatria Defri ' Defri Yoza Desi Indriani Pasaribu, Desi Indriani Dian Andi Syahputra Dian Marliana Diana Gusti Rahayu Diana Wati Didi Tarmadi Djarwanto Djarwanto Dwi Ajias Pramasari Dwi Basliana Okta Efendi, Meizar Elni Segita Eni Rita Rosady Esti Rini Satiti Evi Sri Budiani Evi Sribudiani Ewi Irfani Fadli, Zulkhoiri Fadlian, M Rizky Farhan, Hafid Fiki Rangga Abdi Gemi Marta Jepri Gusmita Sari Haliyani, Risda Hamido, Dhanu Hamka Sari Budiman Haris Aulia Reza Haris Aulia Reza Harsanto Mursyid Hasiolan Siahaan Heriyanto ' Ika Gussuwana Ika Gussuwana, Ika Ika Lestari Ika Lestari, Ika Irham, Wirdayati Junita Saila, Junita Kausar ' Khairilkasdi Khairilkasdi ' Khairul Anwar KHAIRUL ANWAR Khoirunnisa Khoirunnisa Kristian Nurdianto, Kristian Lestari, Antisa Tria Liong Nyuk Firdaus Lisman, Aprizal Loga Mouli Pamula Gumaja Luh Putu Ratna Sundari M Rizky Fadlian M. Khalil Iqbal Lubis M. Rizky Fadlian Maimun Usria Maria Agustina Manurung Maria Manurung Agustina Manurung Masruri, Niskan Walid Mawaddatun izzati Mawaddatun ‘Izzati Meizar Efendi Merry Syafrida Metananda, Arya Arismaya Metri, Erwis Mikrajni Harahap Mikrajni Harahap Mufidah Aulia Muh Arisandi Muhamad Ridho Muhammad Abdi Mukhamadun Mukhamadun Mulyani, Desti Nafiah, M. Ali Nazaris, Nazsha Nayyazsha Niskan Walid Masruri Nugraha, Lefdi Agung Nur Azlina Nur Suhada, Nur Nurul Qomar Nurul Qomar Okta Faisal Pamula Gumaja, Loga Mouli Pandu Rasyidi Pebriandi, Pebriandi Pebrianto Rajagukguk Pretti Sepsi Nola purba, Binton Harianto Putra, Ade Eka Putri Cahyani Qori Amatun Nufus Rahimah ' Raja Febrianto Ratih Damayanti Reno Susanto Riana Median Ridho, Muhamad Rimba Kurniawan S Rino Eka Pratama Rizal Efendi Rofi Julianda Rudang Fanny Rudianda Sulaeman Rudianda Sulaeman Rudianda Sulaeman Rudianda Sulaeman Safruni Safruni Safruni Sahab, Ahmad Sania Dwi Mulia Saputra, Donald Sartika, Reci Sasmita, Fani Shelly Maria Purba Silitonga, Ester Marisi Simamora, Roza D. Siti Aisyah Somadona, Sonia Sulaeman Yusuf Sutami Sutami Sutami Syafi’ah, Zahra’ Syafrinal Syafrinal Taufik Asman Tengku Aisyah Asyari Tengku Nurhidayah Tika Zulkarnain Tuah, Abdul Tumela, Gallery Tuti Arlita Vania, Desti Vona Septiani Putri Vona Septiani Putri Wa Ode Muliastuty Arsyad Wan Muhammad Yunus, Wan Muhammad Warman Fatra, Warman Wasgian Sri Hendrawi Wendy Fitrah Wirda Aprilia Ningsih Wirdayati Irham Wirianto, Robby Yanuar Hamzah Yoghi Gusrandi Yossi Oktorini Yuni Elfiza Yusup Amin Zikri Al Fikri Zuchra Helwani, Zuchra Zul Ningsi