Navigation Links
Biosolids microbes pose manageable risk to workers
Date:10/27/2008

MADISON, WI, OCTOBER 27, 2008Class B biosolids are sewage sludges that have been treated to contain fewer than 2.0 x 106 fecal coliforms/dry gram. The USEPA estimates that 6.3 million tonnes of Class B biosolids are generated in the United States each year, and that by 2010, the amount generated per year will increase to 7.4 million tonnes. Biosolids produced during municipal sewage treatment are most commonly applied to land as a fertilizer at agricultural sites throughout the United States. Class B biosolids, which are the principal type of biosolids applied to land, contain a variety of enteric pathogens.

Land application of biosolids has received national attention due to the potential for off-site transport of disease-causing microorganisms through soil, water, and air. Workers face greater exposure to bioaerosols from biosolids than those not associated with the operation. A new study published in the NovemberDecember issue of Journal of Environmental Quality investigated levels of microorganisms in air immediately downwind of land application operations and estimated occupational risks from aerosolized microorganisms.

The authors report that risks of aerosol-borne infection for biosolids workers are generally low, at less than 1 or 2% per year. Overall, occupational exposure to bioaerosols from biosolids appears to be less risky than similar exposures among wastewater treatment workers.

In all, more than 300 air samples were collected downwind of biosolids application sites at various locations within the United States. Coliform bacteria, coliphages, and heterotrophic plate count (HPC) bacteria were enumerated from air and biosolids at each site. Concentrations of coliforms relative to Salmonella and concentrations of coliphage relative to enteroviruses in biosolids were used, in conjunction with levels of coliforms and coliphages measured in air during this study, to estimate exposure to Salmonella and enteroviruses in air. The HPC bacteria were ubiquitous in air near land application sites whether or not biosolids were being applied, and concentrations were positively correlated to windspeed. Coliform bacteria were detected only when biosolids were being applied to land or loaded into land applicators. Risks from aerosolized microorganisms at biosolids land application sites appear to be lower than those at wastewater treatment plants, based on previously reported literature.


'/>"/>

Contact: Sara Uttech
suttech@soils.org
608-268-4948
Soil Science Society of America
Source:Eurekalert

Related biology news :

1. Dioxin risk in soil and plant tissues after long-term biosolids application
2. Hungry microbes share out the carbon in the roots of plants
3. Microbes churn out hydrogen at record rate
4. Cosmopolitan microbes -- hitchhikers on Darwins dust
5. Scientists melt million-year-old ice in search of ancient microbes
6. Methane from microbes: a fuel for the future
7. Nitrous oxide from ocean microbes
8. Paired microbes eliminate methane using sulfur pathway
9. Hot springs microbes hold key to dating sedimentary rocks, researchers say
10. Unexplored microbes hold incredible potential for science and industry
11. New window opens on the secret life of microbes
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/17/2016)... , Nov. 17, 2016  AIC announces that it has just released a ... organizations that require high-performance scale-out plus high speed data transfer storage solutions. ... ... ... Setting up a high performance ...
(Date:11/15/2016)... DUBLIN , Nov 15, 2016 Research ... - Global Forecast to 2021" report to their offering. ... ... reach USD 16.18 Billion by 2021 from USD 6.21 Billion in ... Growth of the bioinformatics market is driven by ...
(Date:6/27/2016)... Research and Markets has announced the addition of the "Biometrics ... The report forecasts the biometrics market ... CAGR of 12.28% during the period 2016-2020. The ... inputs from industry experts. The report covers the market landscape and ... a discussion of the key vendors operating in this market. ...
Breaking Biology News(10 mins):
(Date:12/2/2016)... 1, 2016   SurePure, Inc. (OTCQB: SURP) ... the Company has concluded an agreement with Tamarack Biotics ... 90-day period to acquire units of the Company,s patented ... 3.7 million.  Concurrently with the option, ... which Tamarack will seek regulatory approvals in ...
(Date:11/30/2016)... York , November 30, 2016 ... as a few players hold a dominant share in ... Charles River Laboratories International, Inc., and Merck KGaA, held ... in 2015. Transparency Market Research observes that these companies ... focused on development products that are do not require ...
(Date:11/30/2016)... 2016  Tempus, a technology company focused on ... Abramson Cancer Center have partnered to better determine ... immunotherapy treatment based on next generation genomic and ... a research collaboration, Tempus will provide sequencing and ... data to Penn. Utilizing next-generation sequencing, machine learning ...
(Date:11/30/2016)... ... November 30, 2016 , ... SSCI, the established leader in ... implications of the latest FDA guidance on pharmaceutical cocrystals as drug substance . ... MA. , The event follows the successful November 15th event that took ...
Breaking Biology Technology: