Estimating Microorganism Densities in Aerosols from Spray Irrigation of Wastewater PDF Download
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Author: John P. Glennon
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 42
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Book Description
Author: John P. Glennon
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 42
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Book Description
Author: United States. Environmental Protection Agency. Office of Research and Development
Publisher:
ISBN:
Category :
Languages : en
Pages : 32
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 32
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Book Description
Author: Howard T. Bausum
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 141
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Book Description
Air sampling equipment was selected and adapted for the study of bacterial aerosols generated through land application of treated wastewater by spray irrigation. Preliminary data were obtained on bacteria present in treated and untreated domestic sewage at Army installations. Data were also obtained on survival of enteric bacteria in laboratory aerosols generated from wastewater at various relative humidities. A field study of 3 weeks duration was undertaken to measure aerosol dissemination of bacteria at a wastewater spray irrigation site at Ft. Huachuca, Az, Aerosol densities for the total aerobic bacteria ranged up to 1630 cu. m. at sampling points nearest the aerosol source. Confirmed coliform bacteria represented about 0.5 percent of the total, and of those nearly half were Klebsiella. Densities were greater under conditions of low wind, atmospheric stability and darkness. A mathematical model predicting downwind aerosol densities was developed, based on the dispersion equation of Pasquill and took into account the parameters of the spray equipment used. The model, in conjunction with fluorescein tracer data, was used in deriving an estimate of the fraction of wastewater entering the aerosol state.
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1054
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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 862
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Author: United States. Environmental Protection Agency
Publisher:
ISBN:
Category :
Languages : en
Pages : 1760
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
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Book Description
The second phase of a field study to measure microbiological aerosol disemination by the spray irrigation mode of land wastewater application was conducted at Ft. Huachuca, AZ. Chlorinated and unchlorinated secondarily treated wastewaters were sprayed in periods of high and low sunlight intensity, and bacterial and virus aerosols were sampled. Predictions of long distance migration and aerosol dispersal of total aerobic bacteria and enteric virus (utilizing seeded coliphage f2 as a model), were emphasized.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1428
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Book Description
Author: Gerald Berg
Publisher: CRC Press
ISBN: 1351082914
Category : Science
Languages : en
Pages : 242
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Book Description
This book argues, that without methods, there can be no research. Effective research requires effective methods, not always easy to come by. The development of methods in environmental virology became a focus of growing interest about two decades ago. Progress has been significant since that time in pure experimental systems, where there are no interferences, consistent high recoveries of viruses from environmental waters has been achievable for some time. In the natural environment, however, in relatively clean waters, substances such as humic and fulvic acids interfere with viral recoveries and average recovery rates probably do not reach 20%. With sewage sludges and shellfish, recoveries are undoubtedly much lower. Yet, even relatively low viral recovery rates have made possible the detection of viral hazards in drinking waters. The hazards that exist are undoubtedly much greater than those demonstrated with the relatively inefficient methods inefficient methods developed thus far. Improving methods, as they are developed in the years to come, will undoubtedly bring the true extent of the hazards into better perspective.
