Navigation Links
Wastewater treatment lowers pathogen levels
Date:1/3/2011

Madison, WI DECEMBER 30, 2010 A recent study by a team of researchers at the University of Arizona has tracked the incident of pathogens in biosolids over a 19 year period in one major U.S. city. In the same study, the researchers also analyzed pathogen levels in biosolids at 18 wastewater treatment plants in the United States.

Their analysis indicates pathogens levels have dropped since the implementation of federal regulations on treating sewage in 1993. These treatment guidelines have proven to be extremely effective with 94% to 99% of all pathogens in biosolids eliminated after wastewater treatment.

"This is the first major study of its kind since federal regulations for wastewater treatment were implemented in 1993," says Dr. Ian Pepper, one of the authors of the study and the director of the University of Arizona's Environmental Research Laboratory.

The term biosolid refers to sewage sludge that has under gone a certain level of treatment and is divided into two classifications. Class A biosolids undergo a high level treatment and do not show any signs of pathogens. In contrast, Class B biosolids receive a lower amount of treatment and have been found to contain bacterial, parasitic, and viral pathogens.

Around 5.5 billion kilograms of biosolids are produced annually in the United States, with the vast majority being Class B. Approximately 60% of the annual production of biosolds is used as agricultural fertilizer.

Pepper adds, "By analyzing the data before and after 1993, the Arizona group was able to determine the influence of the regulations on the incidence of pathogens in Class B biosolids. The study showed that fecal coliforms and virus concentrations are now generally lower than before the 1993 regulations."

Class B biosolids from the Pima County Ina Road Wastewater Treatment Plant in Tucson were analyzed from 1988 to 2006. Additional samples were collected between 2005 and 2008 from wastewater treatment plants in California, Florida, Arizona, Michigan, Minnesota, Wisconsin, Nevada, Oregon, Washington and Wyoming. ALL the samples were analyzed at the University of Arizona.


'/>"/>

Contact: Sara Uttech
suttech@sciencesocieties.org
608-268-4948
American Society of Agronomy
Source:Eurekalert

Related biology news :

1. UC research: Rabbits food brings luck in decreasing estrogen levels in wastewater
2. Stanford engineers use rocket science to make wastewater treatment sustainable
3. Household detergents, shampoos may form harmful substance in wastewater
4. ACS webinar features developments in online water and wastewater monitoring
5. Wastewater produces electricity and desalinates water
6. New method monitors critical bacteria in wastewater treatment
7. Commercial aquatic plants offer cost-effective method for treating wastewater
8. A protein called cFLIP makes tumor cells in breast cancer resistant to treatments
9. Pitt study finds green water treatments may not kill bacteria in large building cooling systems
10. Delivering drugs to the brain: New research into targeted treatment of Alzheimers
11. Novel compounds show early promise in treatment of Parkinsons, Huntingtons, Alzheimers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/18/2017)... -- Socionext Inc., a global expert in SoC-based imaging and computing solutions, ... which features the company,s hybrid codec technology. A demonstration utilizing TeraFaces ... will be showcased during the upcoming Medtec Japan at Tokyo Big ... Las Vegas Convention Center April 24-27. ... Click here for an image of ...
(Date:4/11/2017)... Apr. 11, 2017 Research and Markets has ... report to their offering. ... The global eye tracking market to grow at a CAGR of ... Eye Tracking Market 2017-2021, has been prepared based on an in-depth ... market landscape and its growth prospects over the coming years. The ...
(Date:4/5/2017)... , April 5, 2017 Today HYPR ... that the server component of the HYPR platform is ... providing the end-to-end security architecture that empowers biometric authentication ... HYPR has already secured over 15 million users across ... manufacturers of connected home product suites and physical access ...
Breaking Biology News(10 mins):
(Date:8/15/2017)... Linda, Ca (PRWEB) , ... August 15, 2017 ... ... coffee production and is threatened by various biotic and abiotic factors. During this ... complex evolutionary history of coffee, as well as gain a better understanding of ...
(Date:8/11/2017)... 2017  Market researcher Kalorama Information was ... regarding the telemedicine market.  The telemedicine market ...  The article, "Heart and Asthma Monitors? ... information from Kalorama Information,s Remote Patient Monitoring ...  (Sleep, Diabetes, Vital Signs /EKG and ...
(Date:8/10/2017)... (PRWEB) , ... August 09, 2017 , ... ... the classroom next week-- as students. From August 14th through the 16th, the ... institute, which debuted in the summer of 2016, provides Philadelphia-based middle school educators ...
(Date:8/10/2017)... ... August 10, 2017 , ... DrugDev and ... webinar to demonstrate how Good Clinical Practice (GCP) can be used throughout ... addition the webinar will discuss the importance of GCP compliance, how sites are affected ...
Breaking Biology Technology: