1887

Abstract

Fermentative bacteria were isolated from refuse excavated from municipal solid waste landfills in New York, Florida and Arizona. Anaerobic bacteria cultured on enriched solid media ranged from 10 to 10 c.f.u. (g dry wt of refuse). A significant correlation ( <0·03) was found between numbers of anaerobes cultured at 37 °C and moisture content of refuse. Bacteria hydrolysing starch and protein represented 0-15 % of the total anaerobes cultured; no anaerobic bacteria hydrolysing ball-milled cellulose were isolated. Aerobic bacteria isolated on enriched medium ranged between 10 and 10 c.f.u. (g dry wt). Direct microscopic counts of total bacteria associated with refuse were in the order of 10 bacteria (g dry wt). These data suggest that, despite relatively high densities of bacteria in landfills, polymer hydrolysis is mediated by a small percentage of the fermentative population.

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1993-02-01
2024-04-27
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