Effects of ultraviolet light disinfection on tetracycline-resistant bacteria in wastewater effluents

Childress, Hannah; Sullivan, Bailey Ann; Kaur, Jasjeet; Karthikeyan, Raghupathy

doi:10.2166/wh.2013.257

Cited by 26 publications

(11 citation statements)

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“…One of the tasks of a WWTP is the disinfection of wastewater. Ultraviolet radiation and chemical agents are most commonly used for these purposes (Aslani et al, 2014 ; Childress et al, 2014 ). Both these procedures are expensive, and the latter, chemical wastewater treatment, may be harmful for the environment.…”

Section: Discussionmentioning

confidence: 99%

Microbial Community Structure of Activated Sludge in Treatment Plants with Different Wastewater Compositions

et al. 2016

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Activated sludge (AS) plays a crucial role in the treatment of domestic and industrial wastewater. AS is a biocenosis of microorganisms capable of degrading various pollutants, including organic compounds, toxicants, and xenobiotics. We performed 16S rRNA gene sequencing of AS and incoming sewage in three wastewater treatment plants (WWTPs) responsible for processing sewage with different origins: municipal wastewater, slaughterhouse wastewater, and refinery sewage. In contrast to incoming wastewater, the taxonomic structure of AS biocenosis was found to become stable in time, and each WWTP demonstrated a unique taxonomic pattern. Most pathogenic microorganisms (Streptococcus, Trichococcus, etc.), which are abundantly represented in incoming sewage, were significantly decreased in AS of all WWTPs, except for the slaughterhouse wastewater. Additional load of bioreactors with influent rich in petroleum products and organic matter was associated with the increase of bacteria responsible for AS bulking and foaming. Here, we present a novel approach enabling the prediction of the metabolic potential of bacterial communities based on their taxonomic structures and MetaCyc database data. We developed a software application, XeDetect, to implement this approach. Using XeDetect, we found that the metabolic potential of the three bacterial communities clearly reflected the substrate composition. We revealed that the microorganisms responsible for AS bulking and foaming (most abundant in AS of slaughterhouse wastewater) played a leading role in the degradation of substrates such as fatty acids, amino acids, and other bioorganic compounds. Moreover, we discovered that the chemical, rather than the bacterial composition of the incoming wastewater was the main factor in AS structure formation. XeDetect (freely available: https://sourceforge.net/projects/xedetect) represents a novel powerful tool for the analysis of the metabolic capacity of bacterial communities. The tool will help to optimize bioreactor performance and avoid some most common technical problems.

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Section: Discussionmentioning

confidence: 99%

Microbial Community Structure of Activated Sludge in Treatment Plants with Different Wastewater Compositions

et al. 2016

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“…Due to an insufficient number of studies related to the removal of ARG and ARB from HWW, studies pertaining to the removal of ARB and ARG from all kinds of water matrices have also been highlighted in this work. Disinfection was found to be very efficient in terms of drastically reducing the number of ARB and ARG in wastewater [120] , [121] , [122] , [123] , [124] , [125] . In order to inactivate the ARG inside the bacteria cells, the disinfectant should be able to pass through the cell envelope without getting bound to other cellular constituents.…”

Section: Pilot/full-scale Treatment Systems For Hww Managementmentioning

confidence: 99%

A review on hospital wastewater treatment: A special emphasis on occurrence and removal of pharmaceutically active compounds, resistant microorganisms, and SARS-CoV-2

Majumder

Gupta

Ghosal

et al. 2021

Journal of Environmental Chemical Engineering

198

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“…Efficacy of chlorine to inactivate pathogens is impacted by several factors, including chlorine concentration, pH, contact time, and the bacterial pathogen strain; as the response of Gram negative bacteria against chlorine differ from Gram positive bacteria [11]. Many studies have shown that both chlorine and UV disinfection are effective in reducing concentrations of resistant bacteria [12,13]. Another study [14] also suggested that UV treatment followed by chlorine disinfection may provide enhanced reduction of antibiotic resistant bacteria (ARB) in wastewater effluent, albeit at significantly higher doses and contact times than are commonly employed.…”

Section: Introductionmentioning

confidence: 99%

“…The OCland HOCl species are commonly called free chlorine, which are extremely reactive with numerous components of the bacterial cell [12].…”

Section: Introductionmentioning

confidence: 99%

Chemical Effect of Chlorination Process on Antibiotic Resistant Bacteria

et al. 2018

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C URRENT study was conducted to evaluate the effectiveness of chlorine as a simple and cheap application to inactivate antibiotic resistant bacteria. To achieve this aim, different doses of chlorine (1.0, 1.5, 2.0, 2.5 and 3mg/l) were introduced to antibiotic resistant and sensitive isolates of Salmonella typhimurium as an example of Gram negative bacteria for 20 min contact time. The same chlorine doses were introduced to both antibiotic resistant and sensitive isolates of Staphylococcus aureus as an example of Gram positive bacteria for the same contact time. The antibiotic resistant isolates were obtained from antibiotic resistance genetic transformation experiment, which proves that antibiotic resistance in the aquatic environments was occurred by horizontal gene transfer(mainly genetic transformation). The obtained results showed that, antibiotic resistant and sensitive bacteria have the same chlorine susceptibility in either Gram negative and positive pathogenic bacteria. Whereas, the chlorine susceptibility in antibiotic sensitive and resistant isolates of Salmonella typhimurium (Gram negative bacteria) was relatively higher than chlorine susceptibility in antibiotic sensitive and resistant isolates Staphylococcus aureus (Gram positive bacteria). Where, 3gm/l chlorine dose was able to make complete reduction of each of resistant and sensitive Salmonella typhimurium at 20 min contact time. Whereas, at the same chlorine dose (3mg/l) and contact time (20min), Staphylococcus aureus still culturable (7.0x10 and 9.0x10 CFU/ml) for sensitive and resistant isolates, respectively. And statistical analysis found that there was inverse proportion between chlorine dose and the bacterial counts in both pathogenic bacterial isolates (antibiotic sensitive and resistant).

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Effects of ultraviolet light disinfection on tetracycline-resistant bacteria in wastewater effluents

Cited by 26 publications

References 0 publications

Microbial Community Structure of Activated Sludge in Treatment Plants with Different Wastewater Compositions

Microbial Community Structure of Activated Sludge in Treatment Plants with Different Wastewater Compositions

A review on hospital wastewater treatment: A special emphasis on occurrence and removal of pharmaceutically active compounds, resistant microorganisms, and SARS-CoV-2

Chemical Effect of Chlorination Process on Antibiotic Resistant Bacteria

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