Optimizing Distributed Query Processing.

Abstract

Selected microbial organisms were counted in swine wastes during three studies in which the primary objective was to investigate the effects of feed additives and waste management systems on swine waste composition. Dietary salt (NaCl) levels (.2, .5%), dietary arsanilic acid levels (0, 100, 200 ppm), supplemental copper levels (0, 125, 250 ppm) and waste management systems (oxidation ditch, anaerobic deep pit, anaerobic lagoon) were compared in this series of studies. Dietary salt level did not affect total coliform and fecal streptococci concentrations in swine waste. Supplemental copper and arsanilic acid increased total coliform counts (dry matter basis) in anaerobic pit wastes over counts observed with the control. Salmonella spp concentrations were increased in the anaerobic pit waste at the end of the 104-day feeding trial, especially with the 250-ppm copper diet. Staphylococci spp organisms were not affected by supplemental copper. In all studies, concentrations of the microorganisms cultured were higher in freshly excreted waste than in waste stored and partially treated in the waste systems studies. Temperature, diultion and waste handling systems had some effects on microbial populations.