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Article

E. coli CB390 as an Indicator of Total Coliphages for Microbiological Assessment of Lime and Drying Bed Treated Sludge

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Department of Microbiology, School of Sciences Calidad Microbiológica de Aguas y Lodos (CMAL), Pontificia Universidad Javeriana, Carrera 7 No. 43-82, Bogotá 110231, Colombia
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Dirección de Laboratorio e Innovación Ambiental, Corporación Autónoma Regional de Cundinamarca, Avenida Calle 24 (Esperanza) # 60-50, Centro Empresarial Gran Estación, Costado Esfera—Pisos 6 y 7, Bogotá 111321, Colombia
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Department of Chemistry, Pontificia Universidad Javeriana, Carrera 7 No. 43-82, Bogotá 110231, Colombia
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School of Environmental and Rural Studies, Pontificia Universidad Javeriana, Transversal 4 No 42-00, Piso 8º, Bogotá 110231, Colombia
*
Author to whom correspondence should be addressed.
Academic Editor: Marco Pellegrini
Water 2021, 13(13), 1833; https://doi.org/10.3390/w13131833
Received: 28 May 2021 / Revised: 24 June 2021 / Accepted: 28 June 2021 / Published: 30 June 2021
(This article belongs to the Special Issue Treatment and Reuse of Sewage Sludge)
The use of a single host strain that allows for an evaluation of the levels of total coliphages in any type of environmental sample would facilitate the detection of and reduction in complexity and costs, favoring countries or areas with technical and economic limitations. The CB390 strain is a candidate for this type of simultaneous determinations, mainly in water samples. The objective of the study was to establish the recovery capacity of the CB390 strain in solid and semi-solid samples and to evaluate the microbiological quality of the sludge generated and stabilized by lime and drying beds in two WWTPs in Colombia. The results of both matrices indicated that CB390 recovered similar numbers of total coliphages (p > 0.05) against the two host strains when evaluated separately. Only the drying bed treatment was able to reduce between 2.0 and 2.9 Log10 units for some microorganisms, while the addition of lime achieved a maximum reduction of 1.3 Log10 units for E. coli. In conclusion, the CB390 strain can be used in solid and semi-solid samples, and the treatment in a drying bed provided a product of microbiological quality. However, the results are influenced by the infrastructure of the WWTP, the treatment conditions, and the monitoring of the stabilization processes. View Full-Text
Keywords: biosolids; domestic wastewater; heavy metals; microbiological indicators; sewage sludge; total coliphages; wastewater treatment plant biosolids; domestic wastewater; heavy metals; microbiological indicators; sewage sludge; total coliphages; wastewater treatment plant
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MDPI and ACS Style

Venegas, C.; Sánchez-Alfonso, A.C.; Celis Zambrano, C.; González Mendez, M.; Vesga, F.-J. E. coli CB390 as an Indicator of Total Coliphages for Microbiological Assessment of Lime and Drying Bed Treated Sludge. Water 2021, 13, 1833. https://doi.org/10.3390/w13131833

AMA Style

Venegas C, Sánchez-Alfonso AC, Celis Zambrano C, González Mendez M, Vesga F-J. E. coli CB390 as an Indicator of Total Coliphages for Microbiological Assessment of Lime and Drying Bed Treated Sludge. Water. 2021; 13(13):1833. https://doi.org/10.3390/w13131833

Chicago/Turabian Style

Venegas, Camilo, Andrea C. Sánchez-Alfonso, Crispín Celis Zambrano, Mauricio González Mendez, and Fidson-Juarismy Vesga. 2021. "E. coli CB390 as an Indicator of Total Coliphages for Microbiological Assessment of Lime and Drying Bed Treated Sludge" Water 13, no. 13: 1833. https://doi.org/10.3390/w13131833

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