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All Journal Jurnal Ilmu Lingkungan PRIMA: Journal of Community Empowering and Services Biodiversitas Journal of Biological Diversity
Sutami Sutami
Department Of Plantation Production Technology And Management, Vocational School, IPB University, Borgor, Indonesia.
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

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Kompos Pelet: Solusi Praktis Berkelanjutan, dan Berbasis Ekonomi Sirkular dalam Pengelolaan Sampah Rumah Tangga MMA Retno Rosariastuti; Sutami Sutami; Widyatmani Sih Dewi; Sudadi Sudadi
PRIMA: Journal of Community Empowering and Services Vol 10, No 1 (2026): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/prima.v10i1.110663

Abstract

Pellet Compost: A Practical, Sustainable, and Circular Economy-Based Solution for Household Waste Management. One type of waste that is readily available is leaf litter. Leaf litter is a major contributor to household waste. Compostable waste has great potential to be utilized optimally to provide both economic and ecological benefits. This community service program was carried out from July to November 2025 through several stages: preparation, implementation, and evaluation. The purpose of this activity is to process organic waste into environmentally friendly pellet-based compost. Pellet-based compost is a solid organic fertilizer formed into pellets. Its shelf life is longer than loose compost. Pellet compost is drier, more visually appealing, richer in nutrients, and has a higher market value. The ingredient ratio in pellet production is a key factor that determines the quality, efficiency, and final performance of the pellets. The best ingredient ratio for pellet production between compos: tapioca flour: coconut shell charcoal: and water is 10:1:1:2. The sale of coconut shell charcoal pellets yields higher profits compared to bran and dolomite, amounting to Rp. 2,478 per piece. This approach offers a practical and sustainable solution, providing ecological benefits by reducing organic waste and supporting a circular economy in waste management. This community service initiative is expected to help the community understand how to produce pellet compost, enabling them to meet agricultural needs independently without relying on external raw materials. The program demonstrates that solving environmental issues can go hand in hand with improving the regional economy. This reflects the essence of Sustainable Development Goal (SDG) 12, which is responsible consumption and production.
A salt tolerant Sphingosinicella microcystinivorans A3 isolated from soil contaminated with mercury in traditional gold mining of Jendi Village, Wonogiri District, Indonesia Sutami SUTAMI; Purwanto PURWANTO; Retno Rosariastuti
Biodiversitas Journal of Biological Diversity Vol. 22 No. 9 (2021)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d220923

Abstract

Abstract. Sutami, Purwanto, Rosariastuti R. 2021. A salt tolerant Sphingosinicella microcystinivorans A3 isolated from soil contaminated with mercury in traditional gold mining of Jendi Village, Wonogiri District, Indonesia. Biodiversitas 22: 3785-3791. Isolation and characterization of indigenous bacteria from the soil of traditional gold mining contaminated with mercury is the first step in a series of research to explore and utilize indigenous bacteria in Jendi's area. This study was aimed to determine the characteristics and identity of bacterial isolates from soil of traditional gold mining in Jendi Village, Wonogiri contaminated by mercury. The methods used in this study included bacterial isolation, media preparation, phenotypic identification including; morphological and physiological tests and genotyping tests. The results showed that the bacterial isolate A3 grew optimally in media with the addition of 10% NaCl, at a temperature of 27°C, and pH 9. There were negative reactions to the observations of gram staining, acid production from glucose, indole production, catalase and urease, and positive reactions to oxidation. A neighbor-joining phylogenetic tree based on the 16S rRNA gene sequence showed that the A3 strain was closely related to Sphingosinicella microcystinivorans strain Y2T (JCM 13185T) with 100% Query coverage and a maximum identity of 99.56%.
Bacterial diversity in the western slopes of Mount Lawu, Karanganyar, Indonesia RETNO ROSARIASTUTI; SUTAMI SUTAMI; SETYA NUGRAHA; BAMBANG SIGIT AMANTO
Biodiversitas Journal of Biological Diversity Vol. 24 No. 4 (2023)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d240423

Abstract

Abstract. Rosariastuti R, Sutami, Nugraha S, Amanto BS. 2023. Bacterial diversity in the western slopes of Mount Lawu, Karanganyar, Indonesia. Biodiversitas 24: 2125-2133. Bacteria are an essential ecosystem component that is critical in nutrient recycling. Mount Lawu is an ecosystem with various habitats supporting bacterial growth. This region contains a diverse range of bacteria that has received little attention. This study aimed to investigate the bacterial biodiversity on Mount Lawu's western slopes of Karanganyar District, Central Java Province, Indonesia based on land use differences. There are five land uses including vegetable plantations, paddy fields, residential, mixed land, and forests. This study is exploratory-descriptive; the survey method and exploration technique are employed. Then, the Next Generation Sequencing (NGS) approach was administered to identify the type of bacteria. This research revealed more than 10 phylum and 28 species of bacteria. The diversity index (H') value was 8.80 for Vegetable plantations, 8.50 for paddy fields, 8.26 for mixed land, 8.10 for residential, and 7.66 for forests, with the highest bacterial diversity index in vegetable plantations. The bacterial diversity incorporates the phylum Proteobacteria, Methylomirabillota, Firmicutes, Actinobacteria, Verrucomicrobiota, Acidobacteriota, Bacteroidota, Myxococcota, Chloroflexi, and others. Phylum Proteobacteria was dominant in each land use, followed by Phylum Actinobacteria. The bacterial diversity on Mount Lawu's western slope was high. This study's findings are useful as a database (information) on microbial biodiversity in Central Java.
The Effectiveness of Several Bioactivators in Influencing Compost Quality Retno Rosariastuti; Mohammad Farhan Hafizd; Sutami Sutami; Agustin Ayu Saputri; Widyatmani Sih Dewi; Sudadi Sudadi
Jurnal Ilmu Lingkungan Vol 24, No 4 (2026): July 2026
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.24.4.979-990

Abstract

Excessive long-term use of inorganic fertilizers has contributed to the decline in soil quality in Indonesia. Therefore, the use of organic fertilizers, such as compost, is considered a more sustainable alternative to improve soil fertility and health. This study aimed to evaluate the effects of various bioactivators on compost quality and its compliance with the Regulation of the Minister of Agriculture of the Republic of Indonesia No. 7763/2024. The study employed an experimental method using a Completely Randomized Design (CRD) with one factor, namely bioactivator type (control, fungal consortium, eco-enzyme, biofilm biofertilizer, and EM4), with five replicates. The data were statistically analyzed using analysis of variance (ANOVA), followed by Duncan’s Multiple Range Test (DMRT). The results showed that the type of bioactivator significantly affected compost quality. Compost treated with biofilm biofertilizer exhibited the highest quality, with organic carbon content of 10.45%, total nitrogen of 1.36%, total phosphorus of 1.31%, and a C/N ratio of 7.68, while maintaining a near-neutral pH of 7.96. In contrast, the compost without a bioactivator (control) exhibited the lowest quality. Most treatments met the compost quality standards stipulated in the Regulation of the Minister of Agriculture of the Republic of Indonesia No. 7763/2024 for pH, C/N ratio, and NPK content (<2%); however, none met the minimum organic carbon requirement (≥15%). This was attributed to the compost being harvested three months after the composting process. As composting progresses, organic carbon tends to decrease because microorganisms decompose organic matter and oxidize carbon into CO₂. The decrease is generally greater during the early stage of composting because readily decomposable organic fractions are still abundant, whereas during the maturation stage, the rate of carbon loss slows as the remaining organic matter becomes more stable and resistant to decomposition. Overall, biofilm, biofertilizer, and the fungal consortium were the most effective bioactivators, as they produced compost with the highest quality and the closest compliance with the established quality standards.
Co-Authors Agustin Ayu Saputri BAMBANG SIGIT AMANTO MMA Retno Rosariastuti Mohammad Farhan Hafizd Purwanto PURWANTO RETNO ROSARIASTUTI Retno Rosariastuti Retno Rosariastuti SETYA NUGRAHA Sudadi Sudadi Sudadi Sudadi Widyatmani Sih Dewi