Provider: ingentaconnect
Database: ingentaconnect
Content: application/x-research-info-systems
TY - ABST
AU - Jensen, James N.
AU - Madge, Bethany A.
TI - UV DISINFECTION MODELING: IMPLICATIONS OF BACTERIAL COLONIZATION OF WASTEWATER SOLIDS
JO - Proceedings of the Water Environment Federation
PY - 2004-01-01T00:00:00///
VL - 2004
IS - 15
SP - 407
EP - 419
N2 - Fractions of fecal coliform based on the size of their associated particles were generated by sequential filtration of municipal wastewater. Size fractionation provided opportunities for modeling disinfection. The Scheible model for relating the non-inactivated bacterial density with
total suspended solids (TSS) was modified. A weak correlation was found between the large fraction initial coliform concentration (operationally defined as organisms retained on a 20 μm filter) and TSS. The empirical WERF model appeared to describe the disinfection data well, with dose
and initial fecal coliform concentration as the most significant factors. The disinfection curves could be reconstructed successfully by a weighted addition of the disinfection characteristics of the fractions. The reconstruction was successful even when the initial fecal coliform concentrations
of the size fractions was estimated by TSS. Reconstruction of the tail, along with the disinfection curve for the large fraction, indicated that about 1% of the organisms retained on a 20 μm filter contributed to the tail. Two other observations (the dependence of the disinfection
rate constant for a fraction on the initial fecal coliform concentration of the fraction and that the whole sample survivor density approaches the large fraction survivor density at large doses) were described by the rational model (where the rate of disinfection is proportional to the survivor
concentration raised to a power).
UR - http://www.ingentaconnect.com/content/wef/wefproc/2004/00002004/00000015/art00040
M3 - doi:10.2175/193864704784148367
UR - http://dx.doi.org/10.2175/193864704784148367
ER -