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:3/22/2016)... Ontario , PROVO and ... Newborn Screening Ontario (NSO), which operates the ... for molecular testing, and Tute Genomics and UNIConnect, ... management technology respectively, today announced the launch of a ... next-generation sequencing (NGS) testing panel. NSO ...
(Date:3/15/2016)... 15, 2016 --> ... Transparency Market Research "Digital Door Lock Systems Market - Global ... 2023," the global digital door lock systems market in terms ... and is forecast to grow at a CAGR of 31.8% ... and medium enterprises (MSMEs) across the world and high industrial ...
(Date:3/11/2016)... 2016 http://www.apimages.com ) - --> ... available at AP Images ( http://www.apimages.com ) - ... to produce the new refugee identity cards. DERMALOG will be unveiling ... in Hanover next week.   --> ... used to produce the new refugee identity cards. DERMALOG will be ...
Breaking Biology News(10 mins):
(Date:5/23/2016)... CA (PRWEB) , ... May 23, 2016 , ... ... public interest organization focused on molecular nanotechnology, announced the winners for the 2015 ... pioneer physicist Richard Feynman, are given in two categories, one for experiment and ...
(Date:5/20/2016)... ... ... The recent recall by Costco and Trader Joes of 47 million pounds of ... demonstrates the need for faster and more cost effective bio-threat detection to ensure food ... , PathSensor’s latest solution uses a biosensor technology called CANARY®. CANARY®, an ...
(Date:5/19/2016)... , May 19, 2016 ... and (OTC PINK: RGBPP) announced today initiation of ... first cord blood based cancer immunotherapeutic product leveraging ... application, Regen described a generation of cord blood ... by gene silencing.  The product in development will ...
(Date:5/18/2016)... ... 18, 2016 , ... STACS DNA Inc., the sample tracking software company, today ... assault kit processing to help them save time and reduce errors. , Sexual Assault ... be processed and victims informed of results. Due to a previous lack of tools, ...
Breaking Biology Technology: