Impact of sludge bulking on receiving environment using quantitative microbial risk assessment (QMRA)-based management for full-scale wastewater treatment plants

Deepnarain, Nashia; Nasr, Mahmoud; Amoah, Isaac Dennis; Enitan, Abimbola M.; Reddy, Poovendhree; Stenström, Thor Axel; Kumari, Sheena; Bux, Faizal

doi:10.1016/j.jenvman.2020.110660

Cited by 21 publications

(2 citation statements)

References 43 publications

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“…The QMRA approach was applied to evaluate and quantify the health risks (annual infection risk and disease burden) associated with exposure to microbial bioaerosols. 14 The QMRA approach included four steps such as hazard identification, exposure assessment, dose-response assessment, and risk characterization, 15 which are briefly described below:…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Seasonal Variation on the Health Risks Using the Quantitative Microbial Risk Assessment Approach in a Wastewater Treatment Plant in Hamadan, Iran

Hooshmandi,

Mazaheri Tehrani,

Habibi Mohraz

et al. 2023

J Res Health Sci

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Background: Wastewater treatment plants (WWTPs) are a source of airborne bacterial contamination that can pose health risks to staff. The aim of this study was to evaluate seasonal variations in the health risks of exposure to Staphylococcus aureus bioaerosols using the quantitative microbial risk assessment (QMRA) approach in a WWTP in Hamadan, Iran. Study Design: This was a descriptive cross-sectional study. Methods: This study determined the emission concentrations of S. aureus bioaerosols in summer and winter. Then, the health risks of three exposure scenarios (the worker, field engineer, and laboratory technician) were evaluated using the QMRA approach. The bioaerosol samples were collected every 12 days in both summer and winter of 2021 with a nutrient agar using a single-stage cascade impactor (Quick Take 30, SKC Inc.) in both outdoor and indoor environments. Results: The results demonstrated that in both seasons, S. aureus bioaerosol concentrations in outdoor and indoor environments were below the standard established by the American Conference of Governmental Industrial Hygienists (500 CFU/m3 ). While in summer, the annual infection risks and the disease burden for the three exposure scenarios in both outdoor and indoor environments were higher than the United States Environmental Protection Agency (≤10-4 pppy) and the World Health Organization (WHO) (≤10-6 DALYs pppy-1) benchmarks, respectively. Conclusion: The findings provided high health risks for staff in the three exposure scenarios of an indoor environment, which should not be ignored, as well as emphasizing the use of the QMRA approach to estimate health risks caused by occupational exposure to bioaerosols and taking executive measures to protect staff working in the WWTPs.

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Section: Methodsmentioning

confidence: 99%

Evaluation of Seasonal Variation on the Health Risks Using the Quantitative Microbial Risk Assessment Approach in a Wastewater Treatment Plant in Hamadan, Iran

Hooshmandi,

Mazaheri Tehrani,

Habibi Mohraz

et al. 2023

J Res Health Sci

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“…Nowadays, the reuse of wastewater is practiced worldwide to overcome the persisting problem of water scarcity. The recommended guideline for wastewater reuse is documented in QMRA [14]. Typical wastewater from domestic/household sources includes toilet flushing, laundry, dishwashing, food residues, oils, soaps, and numerous chemicals.…”

Section: Status Of Wastewater Reusementioning

confidence: 99%

Removal and recovery of nutrients and value-added products from wastewater: technological options and practical perspective

Srivastava

Pothu

Sanchez

et al. 2021

Syst Microbiol and Biomanuf

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Wastewaters from various process industries, namely food and agricultural, sugar mill, brewery, milk, vegetable and fruit, and meat and fisheries processing industries and their wastewater effluents contain nutrients, organic matter, inorganic, heavy metals, suspended solids, and pathogens. The discharges of non-treated wastewater enter the nearby aquatic ecosystem (e.g., lakes, rivers) and are a significant concern due to the presence of different nutrients, competing ions and C containing pollutants. It causes excessive growth of algae, loss of habitat/species, and other negative impacts on human health/environment. In the present review, different treatment approaches have been discussed in utilizing these nutrients to synthesize value-added products such as biopolymer, biofuel, pigment, organic acid, or enzymes. These biopolymers can be used to prepare various food products/packaging materials. Dextran, chitosan, carrageenan, alginate, and pectin are good examples of non-food biopolymers. Besides these products, poly-β-hydroxybutyrate (PHB) synthesis from wastewater nutrients is reported as a new source of bio-nanocomposite materials/biopolymer-based coatings. In this review, the different treatment approaches are discussed, which are being used worldwide for the removal/recovery of nutrients, toxic pollutants, and the potential resource recovery of value-added products from wastewater.

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Introduction to “Cost-efficient Wastewater Treatment Technologies: Engineered Systems”

Nasr

Negm

2022

The Handbook of Environmental Chemistry

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Impact of sludge bulking on receiving environment using quantitative microbial risk assessment (QMRA)-based management for full-scale wastewater treatment plants

Cited by 21 publications

References 43 publications

Evaluation of Seasonal Variation on the Health Risks Using the Quantitative Microbial Risk Assessment Approach in a Wastewater Treatment Plant in Hamadan, Iran

Evaluation of Seasonal Variation on the Health Risks Using the Quantitative Microbial Risk Assessment Approach in a Wastewater Treatment Plant in Hamadan, Iran

Removal and recovery of nutrients and value-added products from wastewater: technological options and practical perspective

Introduction to “Cost-efficient Wastewater Treatment Technologies: Engineered Systems”

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