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This study analyzes the conditions of extreme overcapacity in an installed exhaust ventilation system (Qinstalled = 18.00 /minute) that serves four acid cabinet units, specifically for the storage of volatile Hazardous and Toxic Materials (B3) such as toluene and methanol in tightly sealed containers. Although high capacity ensures safety, this practice causes significant energy inefficiency and unnecessary negative pressure problems in the room. Based on engineering analysis using a conservative Air Change Rate (ACR) standard of   for liquid storage of 1.38 /minute. By applying the industry standard safety factor (FoS) of 1.5, the ideal flow rate (Qideal) that must be allocated is 2.07 . The optimization analysis concludes that the currently installed system is theoretically capable of safely and efficiently serving 8 units of volatile storage acid cabinets, with the addition of 4 new cabinets to maximize efficiency and reduce energy waste. This utilizes 92% of the total capacity while maintaining a safety factor above 1.5.

This community service program aims to empower the community of Ujung Tanah District, Makassar City in circular economy-based waste management. Ujung Tanah District as a coastal area with high population density faces complex waste problems, especially waste that ends up in the sea and disrupts the coastal ecosystem. The activities were conducted in four urban villages, namely Ujung Tanah, Tabaringan, Pattingalloang, and Pattingalloang Baru, involving 120 households as direct participants. The implementation methods included socialization and education, waste sorting and processing training, establishment of Waste Banks, mentoring for recycled product creation, and marketing system development. The results showed a significant improvement in community knowledge about waste management, with average scores increasing from 45.2 to 82.6. Four active Waste Bank units were established with a total of 320 household customers. The managed waste volume reached 2.4 tons per month with an economic value of IDR 8,500,000 per month. Recycled products include ecobrick crafts, bags from plastic packaging, and compost fertilizer. This program successfully changed the community paradigm from dumping waste into the sea to managing waste as a source of income.

This article discusses the application of service learning as an educational approach that supports the preservation of cultural heritage and the strengthening of sustainable tourism in Batu Caves, Kuala Lumpur, Malaysia. As one of the most important Hindu temple complexes in Southeast Asia, Batu Caves has become a symbol of cultural diversity and interreligious harmony. However, increased tourism activity has brought about various problems, such as environmental pollution, waste management issues, and the erosion of cultural values among visitors. To address these challenges, service-learning programs integrate academic theory with direct participation in the community, allowing students to actively engage in environmental conservation, cultural documentation, and the development of public education initiatives. Thru collaboration with temple managers, local communities, and tourists, students applied management concepts in real-world situations, including cleaning activities, maintaining tourist areas, developing educational materials on eco-tourism, and preserving traditional rituals thru cultural archiving. The implementation of this service learning not only enriches students' learning experiences but also raises public awareness about the importance of preserving Batu Caves as a sustainable cultural heritage site. Overall, this project demonstrates that service learning is a transformative pedagogical approach that connects academic goals with community development and cultivates future leaders who are socially responsible and culturally sensitive.

Air pollution and damage to the earth are central world problems and are threats that will occur if humans continue to cause damage to this earth. Pollution on earth is very clear is the increasing amount of organic and non-organic waste, in activities to meet the needs of society, the end result is waste, both waste generated from the needs of clothing, food and shelter, if not handled properly and correctly will threaten the survival of society and threaten the ecology in the world, Organic and non-organic waste must be handled with good management. Management as a tool for organizational management in a society is expected to play an important role in providing education and understanding to the community about the impacts and dangers caused by the increase in waste due to human activities, so that it can strengthen the culture and ethics of society in managing waste so that it will increase the creative abilities of society, creativity, taste and intention in managing waste. The type of research conducted by the author is included in the category of qualitative research literature study method researchers to collect and evaluate information from various previous studies, thus providing a comprehensive understanding of the subject under study.

Nutritional problems in toddlers remain a public health challenge in Indonesia, including in Tarakan City, North Kalimantan. The 2018 Basic Health Research (Riskesdas) data shows a high prevalence of malnutrition, severe malnutrition, and stunting in toddlers, with data showing that based on the body weight index (BB/A) the prevalence of malnourished toddlers is 3.9% while 13.8% of toddlers are undernourished. Based on the height-for-age (H/A) index, there are 11.5% of toddlers with very short nutritional status and 19.3% of toddlers with stunted nutritional status. Meanwhile, based on the weight-for-height (BB/H) index, the proportion of very wasted children is 3.5%, undernourished children are 6.7%, and overweight children are 8% (Riskesdas, 2018). Because of these problems, early nutrition education efforts are needed. This community service activity aims to increase the knowledge of toddler mothers about the importance of balanced nutrition for children, especially through the use of UHT milk as a nutritional supplement, as well as strengthening the role of integrated health posts (Posyandu) in monitoring child growth and development. Thus, this community service activity contributes to raising public awareness of the importance of meeting toddler nutritional needs and is expected to support government programs to reduce the prevalence of stunting in Tarakan City.

Air pollution is an increasingly serious environmental issue in major cities, including Serang City. The decline in air quality due to motor vehicle emissions, industrial activities, waste incineration, and the reduction of green open spaces harms public health and the environment. Polluted air can cause respiratory problems, reduce the quality of life, and threaten urban ecosystems. This study aims to analyze the level of knowledge, perceptions, and behaviors of Serang City residents regarding air pollution, as well as assess their support for air pollution control policies. The methods used include a mixed-method approach through questionnaires, in-depth interviews, and participatory observation. The results of the study show that the community has a good understanding of the sources of air pollution, particularly vehicle and industrial emissions. They are also aware of the impact of pollution on health, especially for children and the elderly. However, the implementation of protective behaviors such as wearing masks is not yet consistent. Some positive behaviors have begun to develop, such as not burning trash and planting plants at home. Support for pollution control policies is also high. This study emphasizes the importance of continuous education, law enforcement, and collaboration between the government, society, and environmental communities in efforts to mitigate air pollution in Serang City.  

Food waste generated from the household sector is one of the largest contributors to environmental degradation in Indonesia. Food waste generated from the household sector is one of the main contributors to the increasing volume of organic waste in Indonesia. This issue not only creates social and economic problems but also poses a serious threat to environmental sustainability. This study aims to analyze the contribution of household food waste to environmental degradation and to review sustainable management strategies. This study employs a Systematic Literature Review (SLR) method guided by the PRISMA 2020 Statement to review relevant national research conducted during the period 2018-2025. The results of the literature selection show that the impacts of household food waste on environmental sustainability can be categorized into three main dimensions: (1) ecological impacts, including pollution and the increase of greenhouse gas emissions; (2) resource impacts, such as the wastage of energy, water, and land; and (3) social-environmental impacts, including the increasing burden of regional waste management and the declining quality of life for communities living near landfills. The findings emphasize that the management of household food waste plays a crucial role in achieving environmental sustainability, particularly in supporting the attainment of Sustainable Development Goal (SDG) 12, which focuses on responsible consumption and production. Therefore, it is necessary to implement strategies of reduction, reuse, and recycling of food waste at the household level to minimize the negative impacts on environmental sustainability in Indonesia.

Puddles after rainfall remain a common environmental issue in urban areas, including in higher education environments. At Sultan Syarif Kasim State Islamic University (UIN Suska) Riau, post-rain flooding often disrupts academic activities and reduces comfort among campus residents. This study aims to identify the locations of post-rain flooding, analyze the contributing factors, and explore the perspectives and proposed solutions of the campus community through a participatory mapping approach. The study employed a qualitative descriptive method supported by Geographic Information System (GIS) spatial analysis. Data were collected through field observations, interviews with students, lecturers, and staff, and GPS-based flood point mapping. Results show that puddles frequently occur in main parking areas, inter-faculty roads, and flat areas around the Student Activity Center. The main causes include inadequate drainage systems, clogged channels due to waste, limited infiltration zones, and impervious surfaces. The campus community suggested solutions such as improving drainage, constructing infiltration wells, and adopting the green campus concept. Participatory mapping proved effective not only for identifying environmental problems but also for raising ecological awareness and shared responsibility among the academic community.

In the development of a construction project, cost control is very important in the process of managing project costs. Many problems will be encountered in a construction project such as wasteful use of materials, unskilled labor and late completion of the project. This causes waste of costs that do not match the specified budget. In the construction project of the Rectorate of the Sorong City Health Polytechnic building, a budget of Rp. 36,570,996,788.55 is required. This study aims to make savings on previously planned costs, in addition to knowing the comparison of total project costs after analysis. The method used in this study is the Value Engineering method. The Value Engineering method is a method used to identify and eliminate unnecessary activities or reduce costs without reducing function. There are 4 stages of the work plan in this method, namely: Information Stage, Creative Stage, Analysis Stage, and Recommendation Stage. After conducting the Value Engineering analysis, savings of Rp. 654,875,786.25 or 1.79% of the total project cost were obtained. The analysis was conducted on the two highest-cost work items: wall and floor work. For the wall work, it was recommended that the HPL wall covering be replaced with plasterboard, while for the floor work, it was recommended that the 60x60 granite be replaced with 60x60 ceramic tiles.

Many used ABS plastic wastes have problems in their management. The aim of this research is to obtain a prediction of the fatigue life of a mixture of ABS plastic and used ABS as an injection molding product. The research method is carried out through the stages of mixing used ABS with a volume of 10%, 20%, and 30% in ABS grade A and grade B; making fatigue test specimen molds according to R. R. Moore standards, injection molding of a mixture of used ABS and ABS grade A and grade B, checking the straightness and smoothness of the specimen surface, fatigue testing with increasing serial loads, analysis and making a graph of bending stress (S) against fatigue life (N) (S-N Curve). The results of the study showed that the addition of used ABS had an effect on the fatigue life of both grade A and grade B of ABS, where the fatigue life of grade A of ABS increased with the addition of the volume percentage from 0% -30% of used ABS with the highest value at the addition of 30%, namely 43698.9 cycles, while in grade B of ABS, the fatigue life decreased with the increase in volume from 0% -30% with the highest fatigue life in grade B of ABS plastic without a mixture or 0%, namely 41377.5 cycles, the implication of which is that the addition of 0% -30% of used ABS in grade A can increase the fatigue life, but grade B of ABS actually decreases its fatigue life.

Wahno Subdistrict in Abepura District, Jayapura City, faces drainage problems that disrupt the area’s water management function. The varied topography, population growth, and the community’s habit of disposing waste into drainage channels have reduced the system’s capacity and caused frequent waterlogging during rainfall. This study aims to analyze the existing condition of the drainage channels in Wahno and to evaluate their effectiveness in conveying stormwater flow. The research methods include field surveys, channel dimension measurements, capacity calculations, and analysis of the effective volume compared to actual conditions affected by waste and sedimentation. The data were analyzed using quantitative and descriptive approaches to assess the performance level of the drainage system. The results show that most drainage channels in Wahno are not functioning optimally, with an average effectiveness of only 45–60% due to blockages caused by waste and sedimentation. The main factors reducing drainage effectiveness are decreased storage capacity, substandard design, and lack of regular maintenance. It is concluded that improvements to channel capacity, better waste management, and routine maintenance programs are necessary to enhance the drainage system’s effectiveness.

This Community Service Programme was implemented to address the issues faced by Bank Sampah Anggrek's partners in Bendogerit Village, Blitar City. The main problems faced by the partners included limited variety of recycled products, simple waste processing techniques, and ineffective marketing strategies. Activities include socialisation, strengthening local partnerships, recycling training, and digital marketing assistance. As a result, members of the Waste Bank were able to create three new products: plant pots made from orange peels, carnival costumes made from fabric and plastic waste, and ecobrick furniture, and establish collaborations with two local businesses. The constraints of the Community Service Programme activities included limited production facilities, inconsistent participant attendance, low digital literacy, and competition with traditional waste collectors. This programme demonstrates that a waste bank-based sociopreneurship model can have economic, social, and environmental impacts while supporting sustainable waste management strategies. The programme was also successful due to its participatory approach, which actively involved Anggrek Waste Bank members in every step. Participants not only gained new information, but also acquired practical skills that can be used in the processing and marketing of recycled goods. This community service programme greatly helps to raise awareness of the importance of community-based circular economy. While reducing negative impacts on the environment, the sociopreneurship model can boost the community's economy. Bank Sampah Anggrek has the potential to develop into a centre for sustainable waste management innovation at the neighbourhood level by strengthening local capacity and opening up opportunities for cross-sector collaboration.

Boyolali is known as a milk-producing city, which makes animal husbandry one of the biggest options for economic activity. Limited forage resources are one of the problems faced by breeders. This activity aims to provide fermentation training using dry leaves as an alternative animal feed. The method used is to collect dry leaves from local resources in Sumbung Village, followed by training on the fermentation process using probiotic bacteria, which has been proven to be effective in increasing the nutritional value of feed. Fermented dry leaves have an aroma and taste that livestock like, thereby increasing feed consumption. Utilizing fermented dried leaves as animal feed can be a sustainable solution for overcoming limited food sources in Sumbung Village. Apart from providing a higher-quality alternative feed, this research can also support efforts to manage dry leaf waste and encourage environmental sustainability.  

The problem of waste in rural areas is still a serious issue that has an impact on environmental health and the quality of life of the community. Batu Licin Village, Gunung Lengkuas Village, East Bintan District, Bintan Regency is one of the areas that faces similar problems, where household waste is still scattered and has not been handled optimally. This community service activity offers innovative solutions through the manufacture of rocket stoves as a means of efficiently burning certain organic and inorganic waste, as well as the construction of garbage booths as a place to store and sort waste before further processing. The implementation method involves counseling to residents, making prototypes, and direct practice of using rocket stoves and garbage booths by local communities. In addition, this activity also emphasizes the importance of changing community behavior in managing waste with the 3R (reduce, reuse, recycle) principle. The results of the activity show an increase in public awareness in managing waste independently, reducing the accumulation of waste in the village environment, and the emergence of alternative waste processing that is environmentally friendly, energy-efficient, and easy to apply. This innovation not only helps overcome the problem of household waste, but also provides educational value and empowers the community in maintaining the cleanliness and sustainability of the village environment. With the implementation of rocket stoves and garbage booths, it is hoped that a cleaner, healthier, and more viable village environment will be created in the long term.

Waste remains one of the major environmental issues and a serious challenge in rural communities. The lack of discipline in waste disposal and limited knowledge of the impact of non-biodegradable waste have contributed to declining environmental quality and potential health problems. In Buniwangi Village, Pagelaran Subdistrict, Cianjur Regency, these conditions highlight the need for educational programs that provide practical understanding while fostering community awareness. This community service activity aimed to improve residents’ awareness of waste management through visual education media in the form of information boards displaying the decomposition time of various types of waste, ranging from organic to non-organic materials. The implementation method applied an asset-based community development (ABCD) approach, emphasizing active community participation. The program was carried out in three main stages: preparation, implementation, and evaluation. The preparation stage included location surveys, needs mapping, and obtaining permission from village authorities. The implementation stage involved designing attractive educational boards, installing them at strategic points in the village, and conducting socialization to explain the information provided. The evaluation stage was carried out through direct observation and short interviews to assess the program’s impact on community knowledge and behavior.The results indicated an improvement in residents’ understanding of the differences between biodegradable and non-biodegradable waste. Villagers began to show awareness of reducing single-use plastics and started applying the 3R principles (reduce, reuse, recycle) in daily life. Overall, this program had a positive impact by fostering greater environmental concern and became an initial step toward building a sustainable waste management culture in Buniwangi Village.

This community service program was designed to empower residents of RW 06 Kalibaru, North Jakarta, by transforming local organic waste—such as sawdust and seashells—into a high-value commodity: oyster mushrooms. The training began with a needs assessment to ensure the relevance of the materials, followed by the application of the Adult Education (POD) approach, integrating theoretical and practical learning. The theoretical sessions provided participants with insights into economic prospects, nutritional benefits, and business opportunities, while the practical sessions developed technical skills in substrate preparation, sterilization, inoculation, and mushroom maintenance. The program was reinforced through participatory discussions, demonstrations, and simulations to ensure effective skill transfer. Monitoring and evaluation were conducted via Focus Group Discussions, and continuous mentoring was carried out through field visits, online communication, and the formation of farmer groups as collaborative platforms. As a result, participants demonstrated a significant improvement in knowledge and technical skills, accompanied by greater awareness of the economic potential of previously discarded waste. This initiative not only serves as an innovative solution to environmental problems but also acts as a catalyst for the application of the circular economy, creating micro-enterprise opportunities and strengthening community economic independence. The synergy between universities, the local community, and industry partners is a key factor in sustaining the program, with recommendations for expanding training on product diversification, marketing strategies, and policy support to accelerate business development. Additionally, the success of the program has opened new avenues for sustainable entrepreneurship, particularly in communities with limited resources. The involvement of local stakeholders—such as community leaders and small businesses—has been instrumental in fostering a sense of ownership and shared responsibility for the program's success. The use of organic waste as a resource for mushroom cultivation also aligns with broader environmental goals, such as reducing waste and promoting sustainable practices.

Plastic waste continues to be one of the most pressing environmental problems due to its persistence, excessive use in daily life, and difficulty in decomposition. In many communities, including Tanjung Uban Selatan Village, unmanaged plastic waste accumulates in the environment, contributing to pollution and health risks. This community service activity aims to introduce and implement ecobricks as a simple yet effective solution to manage plastic waste. Ecobricks are not designed to destroy plastic but to recycle and repurpose it into useful and even marketable products. The process of making ecobricks requires no special expertise or significant costs, as the primary material is household plastic waste. The activity involved socialization, practical workshops, and guidance for residents on how to properly produce ecobricks. Results from the program show that residents were able to collect and process previously unmanaged plastic waste into solid, reusable building blocks. These ecobricks have potential applications for creating furniture, decorative items, and even small-scale construction, thereby providing both environmental and economic value. Beyond reducing plastic waste, the initiative also fosters community awareness about sustainable waste management practices and promotes environmental responsibility. In conclusion, the introduction of ecobricks in Tanjung Uban Selatan Village demonstrates that simple innovations can empower communities to transform environmental challenges into opportunities for sustainability and income generation.

UMKM Tahu XYZ, a small-scale tofu producer, is currently facing significant challenges in maintaining consistent product quality, primarily due to a high defect rate. Common issues identified include crumbled tofu shapes, overly soft textures, and inconsistent taste, which negatively impact customer satisfaction and business sustainability. This study aims to investigate the root causes of these quality issues and propose practical solutions using the Lean Six Sigma methodology. The research employs a descriptive quantitative approach through the DMAIC framework—Define, Measure, Analyze, Improve, and Control—to ensure systematic problem-solving. Data were collected over a six-month period through direct observation, structured interviews, and review of production records. The analysis identified four dominant types of waste within the production process: unnecessary transportation, product defects, excessive movement, and over-processing. The root causes of these inefficiencies are linked to poor handling of raw materials, variability in soybean quality, and an ineffective production layout that hampers workflow and consistency. To address these problems, the study proposes several targeted interventions, including the redesign of the production layout to optimize flow, the implementation of the 5S (Sort, Set in order, Shine, Standardize, Sustain) workplace organization method, the development of standardized operating procedures (SOPs), and the adoption of improved soybean boiling technology. The implementation of these improvements is projected to significantly reduce product defects, enhance process efficiency, and ultimately increase customer satisfaction. Furthermore, these actions are expected to improve the overall competitiveness of UMKM Tahu XYZ within the highly demanding food industry sector. This research provides actionable insights for other micro, small, and medium enterprises (MSMEs) seeking to apply structured quality control methods to strengthen operational performance and long-term business resilience.

The KKN Program of Universitas PGRI Adi Buana Surabaya for the 2024–2025 period in Kajeksan Village, Sidoarjo Regency, focuses on the issue of family food security by implementing a mixed farming system based on the use of used goods. This service method uses Participatory Action Research (PAR) through the stages of to know (identifying problems), to understand (socialization of concepts), to plan (design a system from gallons of mineral water), to act (training and assistance in making hydroponics-aquaponic systems, making fish feed from household waste, and natural vitamins), and to change (evaluation and sustainability). As a result, there is an improvement in community skills with the realization of catfish harvest along with optimal kale growth, opening household business opportunities, and creating a sustainable empowerment model through appropriate technology transfer.

Acid mine drainage (AMD) is one of the major environmental problems arising from coal mining activities. AMD is formed through the oxidation of sulfide minerals, resulting in acidic water with high concentrations of dissolved heavy metals. This condition is characterized by elevated levels of Fe, Mn, and total suspended solids (TSS), which, if left untreated, can pollute nearby water bodies, damage aquatic ecosystems, and pose risks to human health. Therefore, effective, eco-friendly, and low-cost treatment methods are needed to minimize the negative impacts of AMD. This study aims to investigate the effect of activated carbon derived from sugarcane bagasse as an adsorbent for reducing Fe, Mn, and TSS levels in AMD at the sump of PT Alreksa Bara Mitra. The selection of sugarcane bagasse is based on its abundance as an agro-industrial waste and its high lignocellulosic content, making it a potential raw material for activated carbon. The research involved the preparation of activated carbon through carbonization and activation processes, followed by its application to AMD samples with variations in adsorbent dosage and contact time. Laboratory analyses were conducted to measure the concentrations of Fe, Mn, and TSS before and after treatment. The results showed that sugarcane bagasse-based activated carbon significantly reduced Fe, Mn, and TSS concentrations. The highest removal efficiencies were achieved under optimum conditions, reaching 93.14% for Fe, 95.05% for Mn, and 85.04% for TSS. These findings demonstrate that activated carbon from sugarcane bagasse has a strong adsorption capacity for dissolved metals and suspended solids in AMD. In conclusion, sugarcane bagasse-derived activated carbon has potential as an environmentally friendly and cost-effective alternative for AMD treatment, while simultaneously providing added value to agro-industrial waste. This research is expected to serve as a reference for the development of more sustainable mine wastewater treatment methods.