Featured Research

from universities, journals, and other organizations

How to tell when a sewage pipe needs repair -- before it bursts

Date:
June 4, 2014
Source:
American Chemical Society
Summary:
The nation's sewer system is a topic most people would prefer to avoid, but its aging infrastructure is wearing out, and broken pipes leaking raw sewage into streets and living rooms are forcing the issue. To better predict which pipes need to be fixed, scientists report that certain conditions in the pipes can clue utilities in to which ones need repair -- before it's too late.

The nation's sewer system is a topic most people would prefer to avoid, but its aging infrastructure is wearing out, and broken pipes leaking raw sewage into streets and living rooms are forcing the issue. To better predict which pipes need to be fixed, scientists report in the ACS journal Environmental Science & Technology that certain conditions in the pipes can clue utilities in to which ones need repair -- before it's too late.

Mark T. Hernandez and colleagues note that the maintenance of U.S. wastewater collection systems costs an estimated $4.5 billion every year, much of which goes toward fixing or replacing 8,000 miles of sewers. In the future, these annual costs could top $12 billion. Part of the problem is corrosion caused by sewer gases that feed acid-generating microbes, which grown in biofilms on the inside top surface of the pipes. Although microbe communities have long been recognized as a factor in the corrosion of concrete pipes, they have not been well studied. To fill in the gaps, Hernandez's team decided to figure out what kinds of bacteria and other conditions were most closely associated with corrosion problems.

From 10 different sewer systems in major cities around the country, the scientists measured bacterial diversity, gas concentrations in the air above the wastewater and other factors. In the most worn pipes, they found markedly little variety in the kinds of bacteria present, as well as elevated levels of both hydrogen sulfide and carbon dioxide gases. The researchers concluded that wastewater utilities could economically monitor combinations of these gases in sewage pipes to figure out which sites might be at higher risk for corrosion and take the necessary steps to prevent major damage.


Story Source:

The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Alison Leslie Ling, Charles E Robertson, J Kirk Harris, Daniel N Frank, Cassandra V Kotter, Mark J Stevens, Norman Pace, Mark T. Hernandez. Carbon Dioxide and Hydrogen Sulfide Associations with Regional Bacterial Diversity Patterns in Microbially Induced Concrete Corrosion. Environmental Science & Technology, 2014; 140519085350005 DOI: 10.1021/es500763e

Cite This Page:

American Chemical Society. "How to tell when a sewage pipe needs repair -- before it bursts." ScienceDaily. ScienceDaily, 4 June 2014. <www.sciencedaily.com/releases/2014/06/140604105523.htm>.
American Chemical Society. (2014, June 4). How to tell when a sewage pipe needs repair -- before it bursts. ScienceDaily. Retrieved September 16, 2014 from www.sciencedaily.com/releases/2014/06/140604105523.htm
American Chemical Society. "How to tell when a sewage pipe needs repair -- before it bursts." ScienceDaily. www.sciencedaily.com/releases/2014/06/140604105523.htm (accessed September 16, 2014).

Share This



More Matter & Energy News

Tuesday, September 16, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Space Race Pits Bezos Vs Musk

Space Race Pits Bezos Vs Musk

Reuters - Business Video Online (Sep. 16, 2014) Amazon CEO Jeff Bezos' startup will team up with Boeing and Lockheed to develop rocket engines as Elon Musk races to have his rockets certified. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
MIT's Robot Cheetah Unleashed — Can Now Run, Jump Freely

MIT's Robot Cheetah Unleashed — Can Now Run, Jump Freely

Newsy (Sep. 16, 2014) MIT developed a robot modeled after a cheetah. It can run up to speeds of 10 mph, though researchers estimate it will eventually reach 30 mph. Video provided by Newsy
Powered by NewsLook.com
Manufacturer Prints 3-D Car In Record Time

Manufacturer Prints 3-D Car In Record Time

Newsy (Sep. 15, 2014) Automobile manufacturer Local Motors created a drivable electric car using a 3-D printer. Printing the body only took 44 hours. Video provided by Newsy
Powered by NewsLook.com
Refurbished New York Subway Tunnel Unveiled After Sandy Damage

Refurbished New York Subway Tunnel Unveiled After Sandy Damage

Reuters - US Online Video (Sep. 15, 2014) New York officials unveil subway tunnels that were refurbished after Superstorm Sandy. Nathan Frandino reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

      Technology News



      Save/Print:
      Share:

      Free Subscriptions


      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      Get Social & Mobile


      Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

      Have Feedback?


      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
      Mobile: iPhone Android Web
      Follow: Facebook Twitter Google+
      Subscribe: RSS Feeds Email Newsletters
      Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins