A quantitative microbial risk assessment of wastewater treatment plant blending: case study in San Francisco Bay

Seto, Edmund; Konnan, Jon; Olivieri, Adam W.; Danielson, Richard E.; Gray, Donald M.D.

doi:10.1039/c5ew00147a

Cited by 12 publications

(7 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Many reports were mainly focused on fecal indicators such as Fecal Coliforms and Escherichia coli to evaluate potential health risks, neglecting pathogenic bacteria, viruses, and protozoa groups [15,16]. Consequently, current standards and guidelines for microbiological quality of wastewater may result in underestimation or overestimation of the risks for public health.…”

Section: Introductionmentioning

confidence: 99%

Monitoring Opportunistic Pathogens in Domestic Wastewater from a Pilot-Scale Anaerobic Biofilm Reactor to Reuse in Agricultural Irrigation

Cui

Liang

2019

Water

View full text Add to dashboard Cite

Wastewater reuse for agricultural irrigation in many developing countries is an increasingly common practice. Regular monitoring of indicators can help to identify potential health risks; therefore, there is an urgent need to understand the presence and abundance of opportunistic pathogens in wastewater, as well as plant phyllosphere and rhizosphere. In this study, an anaerobic biofilm reactor (ABR) was developed to treat rural domestic wastewater; the performance of pollutants removal and pathogenic bacteria elimination were investigated. Additionally, we also assessed the physicochemical and microbiological profiles of soil and lettuces after wastewater irrigation. Aeromonas hydrophila, Arcobacter sp., Bacillus cereus, Bacteroides sp., Escherichia coli, Legionella sp., and Mycobacterium sp. were monitored in the irrigation water, as well as in the phyllosphere and rhizosphere of lettuces. Pathogens like B. cereus, Legionella sp. and Mycobacterium sp. were present in treated effluent with relatively high concentrations, and the levels of A. hydrophila, Arcobacter sp., and E. coli were higher in the phyllosphere. The physicochemical properties of soil and lettuce did not vary significantly. These data indicated that treated wastewater irrigation across a short time period may not alter the soil and crop properties, while the pathogens present in the wastewater may transfer to soil and plant, posing risks to human health.

show abstract

Section: Introductionmentioning

confidence: 99%

Monitoring Opportunistic Pathogens in Domestic Wastewater from a Pilot-Scale Anaerobic Biofilm Reactor to Reuse in Agricultural Irrigation

Cui

Liang

2019

Water

View full text Add to dashboard Cite

show abstract

“…Bu virüsler de, biyolojik atıksu arıtma tesisinde giderilememişlerdir. Elde ettiğimiz sonuca benzer şekilde literatürde, Adenovirusler hem giriş atıksuyunda hem de çıkış atıksuyunda bildirilmişlerdir [44].…”

Section: Viral Ajanlarunclassified

“…Atıksularda mevcut olduğu bilinen Giardia spp., hastalık yükünden sorumlu oldukları için ABD'de halk sağlığı endişesi taşıyan patojenler listesinde de yer almaktadır [41]. Literatürde bizim sonuçlarımıza benzer şekilde arıtılmamış atıksularda Giardia kistleri rapor edilmiştir [36,41,44,48]. Çalışmamızda E. histolytica ve C. parvum giriş atıksuyunda negatif (-) olarak tespit edilmiştir.…”

Section: Dışkı Parazitleriunclassified

Tunceli biyolojik atıksu arıtma tesisinde gastrointestinal patojenlerin belirlenmesi

Topal

Toraman

Topal

et al. 2022

NÖHÜ Müh. Bilim. Derg.

View full text Add to dashboard Cite

Bu çalışmada, Tunceli biyolojik atıksu arıtma tesisinde (TBAAT) gastrointestinal patojenler (bakteriyel gastroenterit, viral gastroenterit, enterovirüsler, insan parekovirüsleri, adenovirüsler, dışkı parazitleri) incelenmiştir. TBAAT 'nin giriş ve çıkış suyunda gastrointestinal patojen analizleri yapılmıştır. Elde edilen sonuçlara göre TBAAT 'nin giriş suyunda enterohemorajik/verotoksin üreten Esherichia coli, salmonella, norovirüsler G1, norovirüsler G2, astrovirüsler, adenovirüsler ve Giardia lamblia ajanları tespit edilmiştir. Bu ajanlar TBAAT 'nin giriş suyunda mevcut olmasına rağmen, TBAAT 'nin çıkış suyunda gastroenterite sebep bakteriyel etkenler, enterovirüsler, parekovirüsler, adenovirüsler (EPA) ve dışkı parazitleri tespit edilmemiştir. TBAAT çıkış suyunda viral ajanlardan olan norovirüsler G2, astrovirüsler ve adenovirüsler pozitif (+) olarak tespit edilmiştir.

show abstract

“…Coastal and river waters located in populated areas with limited or overextended water and sanitation infrastructure harbor high rates of drug-resistant bacteria [6,17,26,27], but the extent to which this is true in areas with reliable secondary and tertiary wastewater treatment facilities is not as well characterized. San Francisco Bay (CA, USA) is located in a highly populated and urbanized region with extensive wastewater treatment infrastructure [28,29]. San Francisco Bay also has a legacy of environmental contamination that has resulted in elevated concentrations of a broad range of pollutants [30].…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Drug-Resistant Gram-Negative Saprophytic Bacteria Isolated from Ambient, Near-Shore Sediments of an Urbanized Estuary: Absence of β-Lactamase Drug-Resistance Genes

et al. 2020

View full text Add to dashboard Cite

We assessed the prevalence of antimicrobial resistance and screened for clinically relevant β-lactamase resistance determinants in Gram-negative bacteria from a large urbanized estuary. In contrast to the broad literature documenting potentially hazardous resistance determinants near wastewater treatment discharge points and other local sources of aquatic pollution, we employed a probabilistic survey design to examine ambient, near-shore sediments. We plated environmental samples from 40 intertidal and shallow subtidal areas around San Francisco Bay (California, USA) on drug-supplemented MacConkey agar, and we tested isolates for antimicrobial resistance and presence of clinically relevant β-lactamase resistance determinants. Of the 74 isolates identified, the most frequently recovered taxa were Vibrio spp. (40%), Shewanella spp. (36%), Pseudomonas spp. (11%), and Aeromonas spp. (4%). Of the 55 isolates tested for antimicrobial resistance, the Vibrio spp. showed the most notable resistance profiles. Most (96%) were resistant to ampicillin, and two isolates showed multidrug-resistant phenotypes: V. alginolyticus (cefotaxime, ampicillin, gentamicin, cefoxitin) and V. fluvialis (cefotaxime, ampicillin, cefoxitin). Targeted testing for class 1 integrons and presence of β-lactam-resistance gene variants TEM, SHV, OXA, CTX-M, and Klebsiella pneumonia carbapenemase (KPC) did not reveal any isolates harboring these resistance determinants. Thus, while drug-resistant, Gram-negative bacteria were recovered from ambient sediments, neither clinically relevant strains nor mobile β-lactam resistance determinants were found. This suggests that Gram-negative bacteria in this well-managed, urbanized estuary are unlikely to constitute a major human exposure hazard at this time.

show abstract

A quantitative microbial risk assessment of wastewater treatment plant blending: case study in San Francisco Bay

Abstract: Quantitative Microbial Risk Assessment (QMRA) to assess health risk associated with increasing extreme rainfall events and the practice of wastewater blending.

Cited by 12 publications

References 24 publications

Monitoring Opportunistic Pathogens in Domestic Wastewater from a Pilot-Scale Anaerobic Biofilm Reactor to Reuse in Agricultural Irrigation

Monitoring Opportunistic Pathogens in Domestic Wastewater from a Pilot-Scale Anaerobic Biofilm Reactor to Reuse in Agricultural Irrigation

Tunceli biyolojik atıksu arıtma tesisinde gastrointestinal patojenlerin belirlenmesi

Antimicrobial Drug-Resistant Gram-Negative Saprophytic Bacteria Isolated from Ambient, Near-Shore Sediments of an Urbanized Estuary: Absence of β-Lactamase Drug-Resistance Genes

Contact Info

Product

Resources

About