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Titolo:
Seasonal pathogen removal by alternative on-site wastewater treatment systems
Autore:
Pundsack, J; Axler, R; Hicks, R; Henneck, J; Nordman, D; McCarthy, B;
Indirizzi:
Univ Minnesota, Nat Resources Res Inst, Duluth, MN 55811 USA Univ Minnesota Duluth MN USA 55811 sources Res Inst, Duluth, MN 55811 USA Univ Minnesota, Water Resources Sci Program, Duluth, MN 55811 USA Univ Minnesota Duluth MN USA 55811 rces Sci Program, Duluth, MN 55811 USA Univ Minnesota, Dept Biol, Duluth, MN 55811 USA Univ Minnesota Duluth MN USA 55811 esota, Dept Biol, Duluth, MN 55811 USA
Titolo Testata:
WATER ENVIRONMENT RESEARCH
fascicolo: 2, volume: 73, anno: 2001,
pagine: 204 - 212
SICI:
1061-4303(200103/04)73:2<204:SPRBAO>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOW-PRESSURE DISTRIBUTION; INDICATOR ORGANISMS; FECAL COLIFORMS; WATER; GROUNDWATER; SURVIVAL; CONTAMINATION; BACTERIA;
Keywords:
pathogenic bacteria; wastewater; on-site treatment; septic system; Salmonella choleraesuis; fecal coliform;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Engineering, Computing & Technology
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Axler, R Univ Minnesota, Nat Resources Res Inst, Duluth, MN 55811 USA UnivMinnesota Duluth MN USA 55811 es Inst, Duluth, MN 55811 USA
Citazione:
J. Pundsack et al., "Seasonal pathogen removal by alternative on-site wastewater treatment systems", WAT ENV RES, 73(2), 2001, pp. 204-212

Abstract

Subsurface-flow constructed wetlands, sand filters, and pear filters near Duluth, Minnesota, were studied to determine their seasonal performance forremoving pathogens from wastewater. Influent was a high-strength septic tank effluent (mean values of 5-day biochemical oxygen demand, total nitrogen, and total phosphorus were 294. 96, and 15 mg/L, respectively) at the Natural Resources Research Institute's alternative treatment system test facility in northern Minnesota. Each treatment system was inoculated with cultures of Salmonella choleraesuis (serotype typhimurium) for 5 to 7 consecutive days in summer and winter during 1998 to 1999. After the seeding, outflow samples were taken until Salmonella counts were sustained at background levels. The removal of Salmonella was calculated for each system, although the exact removal mechanisms were not determined. During the summer, the wetlands removed 99.6 to 99.999 4% (2.4 to 5.3 log,, reduction) of the culturableSalmonella. The sand filters demonstrated a greater than 7 log,, removal of Salmonella cells, whereas the peat filters were responsible for a greaterthan 8 log(,10) loss of cells. Fewer Salmonella cells were removed by all of these systems during the winter. although the pattern of removal was similar to their summer operation. During the winter, the wetlands and sand filters removed greater than 1 log(10) of culturable cells, but the pear filters were responsible for a greater than 5 log,, loss of cells. Fecal coliform removal patterns reflected those for Salmonella by treatment systems forsummer and winter periods. Based on Salmonella and fecal coliform removal,the pear tilters operated most effectively followed by the sand filters and the constructed wetlands.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/01/21 alle ore 02:49:43