| Abstract | Managed Aquifer Recharge (MAR) is becoming an attractive option for water storage in water reuse processes as it provides an additional treatment barrier to improve recharged water quality and buffers seasonal variations of water supply and demand. To achieve a better understanding about the level of pathogenic microorganisms and their relation with microbial indicators in these systems, five waterborne pathogens and four microbial indicators were monitored over one year in three European MAR sites operated with reclaimed wastewater. Giardia and Cryptosporidium (oo)cysts were found in 63.2 and 36.7% of the samples respectively. Salmonella spp. and helminth eggs were more rarely detected (16.3% and 12.5% of the samples respectively) and Campylobacter cells were only found in 2% of samples. At the Belgian site advanced tertiary treatment technology prior to soil aquifer treatment (SAT) produced effluent of drinking water quality, with no presence of the analysed pathogens. At the Spanish and Italian sites amelioration of microbiological water quality was observed between the MAR injectant and the recovered water. In particular Giardia levels decreased from 0.24-6.14 cysts/L to 0-0.01 cysts/L and from 0.4-6.2 cysts/L to 0-0.07 cysts/L in the Spanish and Italian sites respectively. Salmonella gene copies and Giardia cysts were however found in the water for final use and/or the recovered groundwater water at the two sites. Significant positive Spearman correlations (p<0.05, r(s) range: 0.45-0.95) were obtained, in all the three sites, between Giardia cysts and the most resistant microbial markers, Clostridium spores and bacteriophages. |
| Text | 42389 2010 10.1016/j.scitotenv.2010.07.042 ISI Web of Science WOS 000282348100001 Scopus 2 s2.0 77956063813 PubMed 20692684 Wastewater reclamation Managed aquifer recharge enteric pathogens Faecal indicators QUANTIFICATION OF PATHOGENIC MICROORGANISMS AND MICROBIAL INDICATORS IN THREE WASTEWATER RECLAMATION AND MANAGED AQUIFER RECHARGE FACILITIES IN EUROPE LEVANTESI C. a ; LA MANTIA R. b ; MASCIOPINTO C. b ; BOCKELMANN U. c ; AYUSO GABELLA M.N. d ; SALGOT M. d ; TANDOI V. a ; VAN HOUTTE E. e ; WINTGENS T. f ; GROHMANN E. c a Water Research Institute, CNR, via Salaria km 29,300 00015 Monterotondo, Roma, Italy; b Water Research Institute, CNR, via Francesco De Blasio 5, 70123 Bari, Italy; c Department of Environmental Microbiology, Technical University Berlin, Franklinstr. 29, D 10587 Berlin, Germany; d Unitat d Edafologia, Facultat de Farmacia, Universitat de Barcelona, Av. Joan XXIII, s/n, E 08028 Barcelona, Spain; e Intermunicipal Water Company of the Veurne Region I.W.V.A. , Doornpannestraat 1, B 8670 Koksijde, Belgium; f University of Applied Sciences, Northwestern Switzerland, School of Life Sciences, Institute of Ecopreneurship, Grundenstrasse 40, CH 4132 Muttenz, Switzerland Managed Aquifer Recharge MAR is becoming an attractive option for water storage in water reuse processes as it provides an additional treatment barrier to improve recharged water quality and buffers seasonal variations of water supply and demand. To achieve a better understanding about the level of pathogenic microorganisms and their relation with microbial indicators in these systems, five waterborne pathogens and four microbial indicators were monitored over one year in three European MAR sites operated with reclaimed wastewater. Giardia and Cryptosporidium oo cysts were found in 63.2 and 36.7% of the samples respectively. Salmonella spp. and helminth eggs were more rarely detected 16.3% and 12.5% of the samples respectively and Campylobacter cells were only found in 2% of samples. At the Belgian site advanced tertiary treatment technology prior to soil aquifer treatment SAT produced effluent of drinking water quality, with no presence of the analysed pathogens. At the Spanish and Italian sites amelioration of microbiological water quality was observed between the MAR injectant and the recovered water. In particular Giardia levels decreased from 0.24 6.14 cysts/L to 0 0.01 cysts/L and from 0.4 6.2 cysts/L to 0 0.07 cysts/L in the Spanish and Italian sites respectively. Salmonella gene copies and Giardia cysts were however found in the water for final use and/or the recovered groundwater water at the two sites. Significant positive Spearman correlations p<0.05, r s range 0.45 0.95 were obtained, in all the three sites, between Giardia cysts and the most resistant microbial markers, Clostridium spores and bacteriophages. 408 http //dx.doi.org/10.1016/j.scitotenv.2010.07.042 levantesi et al science total environment 2010 Articolo pubblicato levantesi_science_of_the_total_environment_2010_ 0.pdf Articolo in rivista Elsevier 0048 9697 Science of the total environment Science of the total environment Sci. total environ. LA MANTIA ROSANNA caterina.levantesi LEVANTESI CATERINA valter.tandoi TANDOI VALTER costantino.masciopinto MASCIOPINTO COSTANTINO TA.P07.014.005 Risanamento di acque di falda TA.P05.006.007 Fattori critici dei rischi di siccita e strategie dintervento |
