Bantul, June 13, 2026 – The Faculty of Biology, Universitas Gadjah Mada (UGM), once again demonstrated its commitment to supporting sustainable environmental development through a community service program (Pengabdian kepada Masyarakat/PkM) entitled “Organic Waste Processing into Compost Fertilizer and the Utilization of Black Soldier Fly (BSF) Maggots.” The program was conducted on Saturday, June 13, 2026, for members of the “Lestari” Women Farmers Group (Kelompok Wanita Tani/KWT) located in Mertosanan Kulon Hamlet, Potorono Village, Banguntapan District, Bantul Regency, Special Region of Yogyakarta. Through this activity, community members were introduced to simple, practical technologies for converting household organic waste into valuable, economically beneficial products.
The program commenced with welcoming remarks from the Head of the Community Service Team of the UGM Faculty of Biology, Prof. Dr. Diah Rachmawati, S.Si., M.Si., who emphasized the importance of organic waste management as part of efforts to maintain environmental quality and support sustainable development. In her remarks, Prof. Diah highlighted that organic waste constitutes the largest component of household waste and, when not properly managed, can lead to various environmental problems, including unpleasant odors, increased risks of disease transmission, and greater volumes of waste being disposed of at temporary waste collection sites. Following her remarks, the chairperson of the Lestari Women Farmers Group delivered an address expressing appreciation for the assistance and guidance provided by the Faculty of Biology UGM. It is expected that this program will enhance the members’ skills and motivation to manage household organic waste sustainably while supporting the agricultural and horticultural activities already undertaken by the group.
During the first session, Dr. Siti Nurbaiti, S.Si., delivered training on compost production to the participants. The presentation began with an introduction to various types of organic waste that can be utilized as composting materials, including fruit and vegetable scraps, leaves, coffee and tea residues, and plant-based food waste. Dr. Nurbaiti explained that compost is the product of the decomposition of organic matter by microorganisms and is rich in nutrients, making it a natural fertilizer that can improve soil fertility. Participants were also introduced to the importance of balancing “green” and “brown” materials, a key factor in producing high-quality compost.
Dr. Wiko Arif Wibowo, S.Si., presented the following session, in which he discussed organic waste processing using Black Soldier Fly (BSF) (Hermetia illucens) maggots. He explained that BSF maggots are the larvae of the black soldier fly and can convert organic waste into protein-rich biomass in a relatively short time. This technology helps reduce organic waste generation and produces valuable products for the agricultural and livestock sectors. According to Dr. Wiko, BSF maggots can reduce the mass of organic waste by approximately 35–45% while generating several useful products, including maggots or prepupae as a protein source for fish and poultry feed, frass (kasgot) as a solid organic fertilizer, and liquid organic fertilizer derived from the process, which can support plant growth.
Throughout the presentations, members of the Lestari Women Farmers Group actively participated by asking questions and sharing their experiences in managing organic waste. Their contributions enriched discussions about the challenges of maintaining consistency in organic waste management practices. Following the theoretical sessions, Dr. Nurbaiti and Dr. Wiko alternated in guiding hands-on demonstrations on compost production using compost bags and BSF maggot cultivation using two methods: the stacked-bucket system and the maggot box system (Si Komat). Participants were shown each stage of the process, including the preparation of tools and materials, layering of organic waste, application of microbial activators, and maintenance techniques during composting. They were also informed about materials that should not be composted, such as plastics, metals, glass, diapers, cooking oil, bones, cigarette butts, and household chemicals, as these can inhibit decomposition.
In the stacked-bucket BSF system, participants were introduced to an organic waste-processing method that enables simultaneous harvesting of three products: maggots, frass, and liquid organic fertilizer produced from fermented leachate. Meanwhile, the maggot box method focused on producing maggots and frass through optimal moisture management of the growth medium. Participants also received practical guidance on selecting suitable feedstock materials, regulating moisture and temperature conditions, and avoiding materials that may hinder decomposition or generate unpleasant odors.
The program also incorporated an academic perspective on waste management and the implementation of circular economy principles, presented by Prof. Dr. rer. nat. Andhika Puspito Nugroho. He emphasized that community-based organic waste management is a strategic approach to reducing environmental pressures while enhancing community self-reliance in utilizing resources that are often regarded as waste. Through this approach, organic waste can be transformed into valuable products, thereby supporting the development of a more sustainable resource management system.
The implementation of the program was supported by members of the UGM Faculty of Biology Community Service Team, including Winda Fionita Nur Safitri, Layly Salsabila, Alfonsus Fidel Pandu Ekanto, and Miftahurrozi (undergraduates); Noor Laila Safitri (master’s student); and Fatimatuzzahra (doctoral student). The team actively assisted in organizing the activities, mentoring participants during practical sessions, and facilitating discussions and question-and-answer sessions.
Through this program, the Faculty of Biology UGM hopes that members of the Lestari Women Farmers Group will be able to implement the organic waste management technologies introduced during the training. Such implementation is expected to reduce household waste accumulation, improve environmental quality, and generate useful products that support agricultural activities and local economic development. In this way, waste can no longer be viewed merely as a problem but rather as a valuable resource that can be transformed into beneficial products, contributing to community welfare and environmental sustainability, in line with Sustainable Development Goal (SDG) 12: Responsible Consumption and Production.














































