Microbiological parameters as an additional tool to improve wastewater treatment plant monitoring

Muela, A.; Orruño, Maite; Alonso, Mariluz L.; Pazos, Mercedes Suárez; Arana, Inés; Alonso, Rosa M.; Jiménez, Roberto; Garaizabal, Idoia; Maguregui, Miren Itxaso; Barcina, Isabel

doi:10.1016/j.ecolind.2010.06.014

Cited by 17 publications

(13 citation statements)

References 30 publications

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“…Muela et al. () detected a variable fraction of unculturable active cells in wastewater samples and indicated that this fraction could include the so‐called viable but nonculturable (VBNC) bacteria (Arana and Barcina ; Oliver ). Moreover, in the last few years, some studies (Sawaya et al.…”

Section: Discussionmentioning

confidence: 99%

“…The reduction efficiency of wastewater secondary treatment was determined (Muela et al. ) for the physicochemical (BOD and SS) and microbiological parameters.…”

Section: Methodsmentioning

confidence: 99%

“…; Muela et al. ) has been reported for wastewater treatment plants (WWTP) using an activated sludge process. Such a reduction is attributed both to abiotic factors, such as adsorption to flocs and settling (Reinthaler et al.…”

Section: Introductionmentioning

confidence: 99%

“…Treatment also reduces the number of microorganisms, including indicator organisms and pathogens. A fecal coliform removal of around two loga-rithmic units (Garcia-Armisen and Servais 2007) or higher (W ery et al 2008;Muela et al 2011) has been reported for wastewater treatment plants (WWTP) using an activated sludge process. Such a reduction is attributed both to abiotic factors, such as adsorption to flocs and settling (Reinthaler et al 2003;Godfree and Farrell 2005), and to biological treatment, specifically to the complex interrelationships that are established between the microbial populations present in the wastewater (e.g., predation by bacterivorous protozoa, bacteriophage lysis and competition from wastewater bacteria) (Atlas and Bartha 1997).…”

Section: Introductionmentioning

confidence: 99%

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Mechanisms involved in Escherichia coli and Serratia marcescens removal during activated sludge wastewater treatment

et al. 2014

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Wastewater treatment reduces environmental contamination by removing gross solids and mitigating the effects of pollution. Treatment also reduces the number of indicator organisms and pathogens. In this work, the fates of two coliform bacteria, Escherichia coli and Serratia marcescens, were analyzed in an activated sludge process to determine the main mechanisms involved in the reduction of pathogenic microorganisms during wastewater treatment. These bacteria, modified to express green fluorescent protein, were inoculated in an activated sludge unit and in batch systems containing wastewater. The results suggested that, among the different biological factors implied in bacterial removal, bacterivorous protozoa play a key role. Moreover, a representative number of bacteria persisted in the system as free-living or embedded cells, but their distribution into liquid or solid fractions varied depending on the bacterium tested, questioning the real value of bacterial indicators for the control of wastewater treatment process. Additionally, viable but nonculturable cells constituted an important part of the bacterial population adhered to solid fractions, what can be derived from the competition relationships with native bacteria, present in high densities in this environment. These facts, taken together, emphasize the need for reliable quantitative and qualitative analysis tools for the evaluation of pathogenic microbial composition in sludge, which could represent an undefined risk to public health and ecosystem functions when considering its recycling.

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Section: Discussionmentioning

confidence: 99%

“…The reduction efficiency of wastewater secondary treatment was determined (Muela et al. ) for the physicochemical (BOD and SS) and microbiological parameters.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanisms involved in Escherichia coli and Serratia marcescens removal during activated sludge wastewater treatment

et al. 2014

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“…nitrogen and phosphorus, removal of slowly-biodegradable organic matters and pathogenic microorganisms by activated sludge [2]. Currently, it is known that populations of microorganisms are the key components in the biogeochemical cycle of organic matter to maintain a balance in natural ecosystems [3].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Assessment of Waste Water Pollution Rate in Almaty City, Kazakhstan

Ibragimova¹,

Esyrev²,

Zhantuarova³

et al. 2016

IJESD

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Abstract-One of the constituent of the environmental safety concept in Kazakhstan is a problem of water resources depletion which is due to physiographic features such as intracontinental location, continental climate, character of relief and uneven distribution of water bodies. There are three large basins within the territory of Kazakhstan: the Caspian and Aral seas, and Lake Balkhash. The purpose of the study was assessing the quality of waste water in Almaty city (Kazakhstan) which flows to Sorbulak -the largest in the world lake-collector, from where it flows to Ili-Balkhash basin. In 2012 the southern shore of Lake Balkhash and bank of the Ili River were enrolled in the list of wetlands of global importance. A comprehensive assessment of the waste water quality in Almaty city (Kazakhstan) during the process of its complex purification: mechanical, physical-chemical and biological was made. Organoleptic, hydrochemical, microbiological and cytotoxicological methods were applied during the study. It was determined that the water inflowing to Sorbulak can be described as mild polluted at nitrogen dioxide, phosphates, lead and phenols level.

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Antibiotics in hospital effluents: occurrence, contribution to urban wastewater, removal in a wastewater treatment plant, and environmental risk assessment

Aydın

Ulvi

et al. 2018

Environ Sci Pollut Res

170

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Microbiological parameters as an additional tool to improve wastewater treatment plant monitoring

Cited by 17 publications

References 30 publications

Mechanisms involved in Escherichia coli and Serratia marcescens removal during activated sludge wastewater treatment

Mechanisms involved in Escherichia coli and Serratia marcescens removal during activated sludge wastewater treatment

Comprehensive Assessment of Waste Water Pollution Rate in Almaty City, Kazakhstan

Antibiotics in hospital effluents: occurrence, contribution to urban wastewater, removal in a wastewater treatment plant, and environmental risk assessment

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