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Pancorbo, O.C. et al.

Effect of sludge type on poliovirus association with and recovery from sludge solids.

Sludge type was found to affect the degree of association between seeded poliovirus type 1 (LSc) and sludge solids. The mean percent of solids-associated viruses for activated sludge mixed liquors, anaerobically digested sludges, and aerobically digested percent of solids-associated viruses for activated sludge mixed liquors, anaerobically digested sludges, and aerobically digested sludges was 57.2, 70.4, and 94.7, respectively. The degree of association between poliovirus and sludge solids was significantly greater for aerobically digested sludges than for the other two sludge types. Sludge solids associated viruses were eluted using 0.05 M glycine buffer, pH 10.5-11.0, and subsequently concentrated by organic flocculation. The effectiveness of the glycine method in the recovery of solids-associated viruses was also found to be affected by sludge type. Significantly lower mean poliovirus recovery was found for aerobically digested sludges (14.5%) than for mixed liquors or anaerobically digested sludges (72.3 and 60.2%, respectively). The eluent used in the method was not as effective in dissociating the virus from aerobic sludge solids as it was for the other two sludge types. All other virus adsorption-elution steps of the method (i.e., virus concentration steps) were equally effective in poliovirus recovery for all three sludge types. It is suggested that future methods developed for the recovery of viruses from sludges be evaluated for the various sludge types likely to be tested.[1]

References

Effect of sludge type on poliovirus association with and recovery from sludge solids. Pancorbo, O.C., Scheuerman, P.R., Farrah, S.R., Bitton, G. Can. J. Microbiol. (1981) [Pubmed]

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