title: Pilot-scale vermicomposting of pineapple wastes with earthworms native to Accra, Ghana.
abstract: Pineapple wastes, an abundant organic waste in Accra, Ghana, were vermicomposted using native earthworms (Eudrilus eugeniae Kinberg) collected from the banks of streams and around bath houses of this city. Triplicate pilot-scale vermidigesters containing about 90 earthworms and three other control boxes with no earthworms were fed pineapple pulp or peels, and the loss of wet mass was monitored over 20 weeks. In a second experiment, a 1:1 mixture of pineapple peels and pulp (w/w) was fed to triplicate pilot-scale vermicomposters and control boxes during a 20 week period. One month after feeding ended, the vermicompost and composted (control) waste was air dried and analyzed. During the first experiment, the vermicomposted pineapple pulp and peels lost 99% and 87% of their wet mass, respectively, indicating the potential for vermicomposting. Fresh pineapple waste exhibited an initial pH of 4.4, but after 24 weeks, the vermicompost and compost had acquired a neutral to alkaline pH of 7.2-9.2. The vermicompost contained as much as 0.4% total N, 0.4% total P and 0.9% total K, and had a C:N ratio of 9-10. A reduction of 31-70% in the Escherichia coli plus Salmonella loads and 78-88% in the Aspergillus load was observed during vermicomposting. The rapid breakdown of pineapple wastes by E. eugeniae demonstrated the viability of vermicomposting as a simple and low cost technology recycling this waste into a soil amendment that could be used by the 2500 vegetable producers of Accra and its surrounding areas.
authors.affiliation: Faculty of Agricultural and Environmental Sciences, Macdonald Campus of McGill University, 21 111 Lakeshore, Ste Anne de Bellevue, Québec, Canada H9X 3V9.
authors.forename: Nana O K
authors.initials: NO
authors.lastname: Mainoo
authors.forename: Suzelle
authors.initials: S
authors.lastname: Barrington
authors.forename: Joann K
authors.initials: JK
authors.lastname: Whalen
authors.forename: Luis
authors.initials: L
authors.lastname: Sampedro
mesh_terms: D000383:Agriculture / Q000379:methods; D031230:Ananas / Q000378:metabolism*; D000818:Animals; D001230:Aspergillus / Q000378:metabolism; D001673:Biodegradation, Environmental; D019149:Bioreactors; D017753:Ecosystem; D004926:Escherichia coli / Q000378:metabolism; D005869:Ghana; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D009835:Oligochaeta / Q000378:metabolism*; D012037:Refuse Disposal / Q000379:methods*; D012475:Salmonella / Q000378:metabolism; D012987:Soil; D012988:Soil Microbiology
chemical_list: D007220:Industrial Waste; D012987:Soil