MANUAL PARA CONSTRUÇÃO DE BIODIGESTOR DE BAIXO CUSTO

Abstract

The Manual/Protocol for the Construction of a Low-Cost Biodigester was developed in response to the growing need for accessible and sustainable technological solutions for the proper management of organic waste and the reduction of environmental impacts. Although biogas production is an efficient alternative for energy generation and waste treatment, its use remains limited in rural communities and small agricultural settings. The proposed manual aims to overcome this gap by offering a simple, low-cost, and replicable model that can be adopted in different social and geographic contexts. The protocol presents detailed and sequential instructions for assembling, operating, and maintaining a functional biodigester built with easily obtainable and reusable materials, such as 200-liter plastic drums, air chambers to tires, PVC pipes, and hoses. It includes technical guidelines, safety recommendations, construction diagrams, monitoring instructions, and orientations for the use of both the biogas produced and the digestate, which serves as an efficient biofertilizer. The target audience includes rural communities, family farmers, students, environmental educators, extension agents, and individuals interested in renewable energy and sustainable technologies. The manual empowers users to construct and apply the system independently, promoting environmental awareness, circular economy practices, and the reduction of waste disposal impacts. The technicalscientific advances associated with this product include the systematization of a low-cost model adapted to the socioeconomic realities of the Cerrado, the dissemination of knowledge on biogas, and the strengthening of sustainable development initiatives. The expected impacts involve promoting social inclusion, reducing energy costs, improving organic waste management, and contributing to local and regional environmental conservation.