Removal of Fecal Indicators, Pathogenic Bacteria, Adenovirus, Cryptosporidium and Giardia (oo)cysts in Waste Stabilization Ponds in Northern and Eastern Australia

Eliminación de indicadores fecales, bacterias patógenas, adenovirus y (oo)quistes de Cryptosporidium y Giardia en lagunas de estabilización de aguas residuales en el norte y este de Australia

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ID: 114765
2016
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Abstract
Maturation ponds are used in rural and regional areas in Australia to remove the microbial loads of sewage wastewater, however, they have not been studied intensively until present. Using a combination of culture-based methods and quantitative real-time PCR, we assessed microbial removal rates in maturation ponds at four waste stabilization ponds (WSP) with (n = 1) and without (n = 3) baffles in rural and remote communities in Australia. Concentrations of total coliforms, E. coli, enterococci, Campylobacter spp., Salmonella spp., F+ RNA coliphage, adenovirus, Cryptosporidium spp. and Giardia (oo) cysts in maturation ponds were measured at the inlet and outlet. Only the baffled pond demonstrated a significant removal of most of the pathogens tested and therefore was subjected to further study by analyzing E. coli and enterococci concentrations at six points along the baffles over five sampling rounds. Using culture-based methods, we found a decrease in the number of E. coli and enterococci from the initial values of 100,000 CFU per 100 mL in the inlet samples to approximately 1000 CFU per 100 mL in the outlet samples for both bacterial groups. Giardia cysts removal was relatively higher than fecal indicators reduction possibly due to sedimentation.
Las lagunas de maduración se utilizan en zonas rurales y regionales de Australia para reducir las cargas microbianas de las aguas residuales cloacales; sin embargo, hasta la fecha no han sido objeto de un estudio exhaustivo. Mediante una combinación de métodos basados en cultivo y PCR cuantitativa en tiempo real, evaluamos las tasas de eliminación microbiana en lagunas de maduración de cuatro sistemas de lagunas de estabilización (WSP, por sus siglas en inglés) con (n = 1) y sin (n = 3) deflectores en comunidades rurales y remotas de Australia. Se determinaron las concentraciones de coliformes totales, *E. coli*, enterococos, *Campylobacter* spp., *Salmonella* spp., colifagos de ARN F+, adenovirus, *Cryptosporidium* spp. y (oo)quistes de *Giardia* en la entrada y la salida de las lagunas de maduración. Únicamente la laguna con deflectores demostró una eliminación significativa de la mayoría de los patógenos analizados, por lo que se sometió a un estudio más detallado mediante el análisis de las concentraciones de *E. coli* y enterococos en seis puntos a lo largo de los deflectores durante cinco rondas de muestreo. Mediante métodos basados en cultivo, se observó una disminución en el recuento de *E. coli* y enterococos desde valores iniciales de 100 000 UFC por 100 mL en las muestras de entrada hasta aproximadamente 1000 UFC por 100 mL en las muestras de salida para ambos grupos bacterianos. La eliminación de quistes de *Giardia* fue relativamente superior a la reducción de indicadores fecales, posiblemente debido a la sedimentación.
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sheludchenko2016internationalremoval Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Maxim Sheludchenko;Anna Padovan;Mohammad Katouli;Helen Stratton;Sheludchenko, Maxim;Padovan, Anna;Katouli, Mohammad;Stratton, Helen;
Journal International journal of environmental research and public health
Year 2016
DOI
10.3390/ijerph13010096
URL
https://doi.org/10.3390/ijerph13010096
Keywords
E. coli enterococci campylobacter jejuni salmonella enterica waste stabilization pond (wsp) maturation pond giardia cysts E. coli enterococci campylobacter jejuni salmonella enterica waste stabilization pond (wsp) maturation pond giardia cysts

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