Viral and Bacterial Aerosols at a Wastewater Spray Irrigation Site PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Viral and Bacterial Aerosols at a Wastewater Spray Irrigation Site PDF full book. Access full book title Viral and Bacterial Aerosols at a Wastewater Spray Irrigation Site by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
Get Book Here
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 :
Languages : en
Pages : 42
Get Book Here
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: Howard T. Bausum
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 141
Get Book Here
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: Arnold Walit Lam
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 70
Get Book Here
Book Description
Viable pathogens are generally present at every stage of wastewater treatment. Thus a potential airborne infectious pathway due to microbial aerosols exists, particularly at activated sludge treatment plants. In this study the concentration of sewage-borne indicator bacteria and viruses in effluent aerosols was determined and the exposure to such aerosols by treatment plant workers was estimated. Initial aerosol collection with fog-gage screen collectors yielded erratic results due especially to lack of control over sampled air volume and slit openings too large for effective collection. Standard Andersen and glass impinger collectors were used throughout the field study. Areas downwind of aeration basins yielded as much as 1 657 CFU/m^3 total bacteria and 1.8 CFU/m^3 coliphage. These aerosols were mostly 2.1 to 3.3 μm droplet nuclei with a high potential for inhalation and bronchial retention. The inhalation of microbial aerosols by Wahiawa treatment plant workers was estimated to be between 48 to 94 total bacteria/person/day above background levels. The inhaled total coliform level may average 8 to 27 CFU/person/day. This usually short duration and sometimes intense exposure could not be implicated directly to cause adverse health effects. Correlations of statistical tabulations of sick-leave illness with degree of exposure were not significant at the 0.01 or the 0.05 level.
Author: John P. Glennon
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 42
Get Book Here
Book Description
Author: H. Pahren
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 388
Get Book Here
Book Description
Author: Donald Edgar Johnson
Publisher:
ISBN:
Category : Sewage irrigation
Languages : en
Pages : 212
Get Book Here
Book Description
Author: Donald Edgar Johnson
Publisher:
ISBN:
Category : Sewage irrigation
Languages : en
Pages : 212
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Pollutants
Languages : en
Pages : 960
Get Book Here
Book Description
Author: Metropolitan Sanitary District of Greater Chicago (Ill.)
Publisher:
ISBN:
Category : Sewage
Languages : en
Pages : 84
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Environmental health
Languages : en
Pages : 212
Get Book Here
Book Description
