Chemicals and microbes in bioaerosols from reaction tanks of six wastewater treatment plants: survival factors, generation sources, and mechanisms

Wastewater treatment commonly includes the production of air bubbles (aeration) at the bottom of activated sludge or during Dissolved Air Flocculation and Floatation. When the bubbles rise to the surface they burst, form droplets and ‘aerosolise’. This is how pathogenic microorganisms in the wastewater can become ‘airborne’.  The Experiment: Bioaerosol samples were collected from 0.1,Continue reading “Chemicals and microbes in bioaerosols from reaction tanks of six wastewater treatment plants: survival factors, generation sources, and mechanisms”

Detection of Infectious Influenza Virus in Cough Aerosols Generated in a Simulated Patient Examination Room

Bioaerosols are generated during wastewater treatment (eg Wang et al., 2018) and personnel working in public are also at risk of infection through inhaling aerosolised virus. This study describes the working efficacy of a N95 respirator mask (left image) or a surgical mask (right image). The Experiment: A mechanical dummy which coughed infectious influenza virusContinue reading “Detection of Infectious Influenza Virus in Cough Aerosols Generated in a Simulated Patient Examination Room”

Exhaled Air Dispersion during Coughing with and without Wearing a Surgical or N95 Mask

This study gives information about surgical mask containment of particles coughed out by an infected person and is relevant to personnel who have to work amongst potentially infectious members of the public who may or may not be wearing masks. In this study a dummy of a 70kg man enclosing a mechanical lung model forContinue reading “Exhaled Air Dispersion during Coughing with and without Wearing a Surgical or N95 Mask”

Survival of Severe Acute Respiratory Syndrome Coronavirus (2005)

This research paper was published in 2005 and relates to SARS-CoV (responsible for the 2002/03 SARS outbreak), not SARS-CoV-2 (responsible for COVID-19). However, since these two viruses are closely related, it is insightful to observe what is known about the former, in order to consider what may be possible (or even likely) for the latter.Continue reading “Survival of Severe Acute Respiratory Syndrome Coronavirus (2005)”