naa a22 4500 510752608 CHVBK 20180411083110.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11270-012-1412-1 doi (NATIONALLICENCE)springer-10.1007/s11270-012-1412-1 Escherichia coli Regrowth in Disinfected Sewage Effluent: Effect of DOC and Nutrients on Regrowth in Laboratory Incubations and Urban Streams [Elektronische Daten] [K. McCrary, Cara Harclerode Case, Terry Gentry, Jacqueline Aitkenhead-Peterson] This study examined the potential for regrowth of Escherichia coli in laboratory-incubated microcosms spiked with ultraviolet (UV)-disinfected sewage effluent and extracts derived from turfgrass or leaf litter. A second part of the study examined the potential of nutrients for predicting E. coli in two urban streams with point source effluent. Microcosms containing effluent and vegetation extracts were incubated for 72h, samples were withdrawn over six time periods for measurement of E. coli. Streams were sampled every 2weeks and E. coli and nutrients measured. E. coli counts in the microcosms exceeded the Texas state secondary contact recreation standard for surface water quality within 12h for the turfgrass and within 18h for leaf litter extracts. Univariate analysis of variance found that the interaction between vegetation extract source and concentration was more important than source of vegetation or concentration of extract alone. In the two streams sampled downstream of a point source effluent discharge, between 82 and 92% of the variance in annual E. coli during high stream flow and between 55 and 57% of the variance in annual E. coli during low stream flow was described by stream water-dissolved organic carbon (DOC) and dissolved organic nitrogen (DON), NH4-N, NO3-N, or PO4-P. Once effluent is discharged to surface water, particularly during high flow conditions, DOC and DON derived from the landscape and nitrogen and PO4-P derived from the effluent will provide ideal conditions for E. coli regrowth in surface waters downstream of the point source discharge. Springer Science+Business Media Dordrecht, 2013 E . coli nationallicence DOC nationallicence DON nationallicence Nitrate-N nationallicence Ammonium-N nationallicence PO4-P nationallicence Surface waters nationallicence Sewage effluent nationallicence McCrary K. Department of Soil and Crop Science, Texas A&M University, 77843, College Station, TX, USA aut Harclerode Case Cara Department of Soil and Crop Science, Texas A&M University, 77843, College Station, TX, USA aut Gentry Terry Department of Soil and Crop Science, Texas A&M University, 77843, College Station, TX, USA aut Aitkenhead-Peterson Jacqueline Department of Soil and Crop Science, Texas A&M University, 77843, College Station, TX, USA aut Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-11 0049-6979 224:2<1 2013 224 11270 https://doi.org/10.1007/s11270-012-1412-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-012-1412-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- McCrary K. Department of Soil and Crop Science, Texas A&M University, 77843, College Station, TX, USA aut NATIONALLICENCE 700 1- Harclerode Case Cara Department of Soil and Crop Science, Texas A&M University, 77843, College Station, TX, USA aut NATIONALLICENCE 700 1- Gentry Terry Department of Soil and Crop Science, Texas A&M University, 77843, College Station, TX, USA aut NATIONALLICENCE 700 1- Aitkenhead-Peterson Jacqueline Department of Soil and Crop Science, Texas A&M University, 77843, College Station, TX, USA aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-11 0049-6979 224:2<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer