Design, fabrication, and performance evaluation of a pedal-driven vermicompost sieve

Abstract

This study presents the design, fabrication, and performance evaluation of a pedal-driven vermicompost sieve aimed at enhancing organic waste management among smallholder farmers in the Philippines. With growing organic waste and the need for sustainable solutions, the proposed machine offers an affordable, eco-friendly option powered by human mechanics, without electricity. It is composed of the following main parts: a) single speed bike set, b) frame, c) trommel screen, d) input hopper, e) discharge chute, and f) collector. This study was completed within 5 months which covered the conceptualization, designing, pretesting and modifications of the fabricated machine until subjected to actual performance evaluation. The machine has an overall dimension of 1180 mm L x 700 mm W x 750 mm H. Performance evaluation revealed an average input capacity of 253.19 kg/hr and a sieving capacity of 137.84 kg/hr, a sieve efficiency of 55.9%, and a purity rate of 54.5% showing reliability in producing high quality vermicompost. The total investment cost for the prototype was PHP40,500.00, with an operating cost of PHP0.98 per kilogram, demonstrating an approximate return of investment after 37 days. The machine significantly improves the vermicomposting process, allowing for separation of useful compost from unwanted materials. This research not only supports sustainable agriculture but also presents a practical solution to enhance productivity and income generation in rural communities.