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Seren Village has abundant organic waste potential, particularly banana peel waste generated from banana-processing MSME activities and wood ash resulting from household firewood combustion. To date, this waste has not been optimally utilized and is often discarded, thereby posing potential environmental problems. This study aims to process banana peel waste and wood ash into an innovative, environmentally friendly shoe polish made from natural materials, while also enhancing the economic value and welfare of the community. The research employed a descriptive qualitative method with a case study approach. Data were collected through observation, interviews, and documentation involving the women’s Family Welfare Empowerment Group (PKK) of Seren Village as the target participants. The shoe polish production process includes drying and grinding banana peels, mixing them with a wood ash solution that functions as a natural coloring agent, adding supporting materials, and heating the mixture until a ready-to-use shoe polish is obtained. The results indicate that the shoe polish produced from banana peels and wood ash has a solid texture, is slightly coarse, non-glossy, and has a relatively fast drying time of approximately one minute. In addition, the product shows good resistance to water splashes and does not damage the surface of shoes. The use of natural ingredients makes this shoe polish safer for health. The utilization of this waste has the potential to support MSME development, reduce environmental pollution, and sustainably improve the welfare of the Seren Village community.

The Nurul Ikhlas Mosque, also known as Surau Parak Mujua, located in Pakan Akek, Jorong Kajai, Nagari Koto Baru, Solok Regency, is an important center of religious and social activities for the local community. In June 2023, the mosque suffered a major fire that destroyed the entire structure, creating an urgent need to redesign it to be more functional, ergonomic, efficient, and adaptable to local conditions. This community service project aimed to produce an architectural design that not only met structural and functional needs but also accommodated the social aspirations and cultural values of the local community. The methods used in this project included field observations to understand the community's conditions and needs, participatory discussions with local community leaders to explore aspirations and hopes, technical drawings using AutoCAD software, and structural analysis using ETABS to ensure the building's earthquake resistance. Ergonomics were a key consideration in this design, encompassing circulation flow, room dimensions, natural ventilation, and the selection of materials that were friendly and safe for the elderly, children, and people with disabilities. The output of this activity is a variety of design documents, including floor plans, elevations, building sections, floor plans, columns and beams, and 3D visualizations that can be used as a guide for phased construction. This program demonstrates the importance of collaboration between universities and the community in responding to post-disaster infrastructure needs. This knowledge-based, participatory approach is expected to produce a final design that is appropriate to real needs and the local context, and supports better and more sustainable post-disaster recovery.

The Community Service Program (KKN) of Raja Ali Haji Maritime University in Toapaya Village has a work program that aims to encourage the advancement of Micro, Small, and Medium Enterprises (MSMEs) by facilitating the creation of Business Identification Numbers (NIB). This study uses a descriptive qualitative approach to understand the process, challenges, and impact of business legality on MSME actors. The results of the activity show that NIB ownership provides significant benefits, including increasing business legality and credibility, expanding access to capital, and opening opportunities to participate in various government programs. The assistance process was carried out through socialization, data collection, technical assistance, and NIB distribution. Despite facing obstacles such as limited digital literacy, internet access, and resistance to change, the collaboration between KKN students, the village government, and related agencies succeeded in helping MSME actors obtain NIBs effectively. With business legality, MSMEs in Toapaya Village were able to increase their competitiveness, expand their marketing networks, and strengthen their role in village economic development. This program proves that MSME empowerment based on business legality can be an important foundation for village independence and sustainable economic growth.