Navigation Links
Solving the stink from sewers
Date:9/21/2012

The rotten egg gas leaking from sewer pipes and costing billions of dollars worldwide in odour control may soon be far less of a problem thanks to new research discussed at the 2012 International Water Association (IWA) conference this week.

Trials with a magic mix of chemicals, called Cloevis, on sewers in the Gold Coast region in Australia stopped 99 per cent of the rotten egg gas or hydrogen sulphide emitted from these pipes.

Lead researcher, Professor Zhiguo Yuan from the University of Queensland, told IWA delegates that one week after dosing for a few hours, in most cases the gas level increased to less than one fifth of its emissions prior to the treatment, and this has been repeatedly observed over a period of five months.

"We are currently looking to commercialise Cloevis and are doing a further four trials of the mix in the US and Canada," Professor Yuan says. "Our partners over there are very excited by Cloevis' potential".

The gases causing the bad smells in sewers also play a role in corroding sewer pipes, which is another costly problem especially in warm climates.

Professor Yuan's team, involving active participation from key members of Australia's water industry, is also working on corrosion issues and have another study into chemical free methods for managing hydrogen sulphide gas.

"We have done some trials with oxygenation of sewage using an electrochemical method which has reduced hydrogen sulphide enormously," he says. "We probably won't stop all bad smells from sewers forever but we're well on the way to reducing their extent."

Other speakers at the IWA conference spoke about managing bad smells from sewers and wastewater drains once they had escaped. Dr Valentina Lazarova from France reported on trials on the strong smells coming from the Oued El Harrach River in Algiers. Her team used jasmine-smelling micro sprays on the highway crossing the river and gels on pedestrian bridges nearby to mask the smells.

"We used 1000 questionnaires and face-to-face interviews with local people and found out that 70 per cent of the population were satisfied or very satisfied with what we did and 96 per cent wanted the project to continue," she says.

Zdaravka Doquang from France talked about how to determine how bad a sewage-based smell is for people, with regards to both its type and intensity of smell. Her team has developed an 'odour wheel' for sewage smells that: "helps to classify odours and ensure a common language to communicate about the odours."

"People are most sensitive to hydrogen sulphide or rotten egg gas compounds both qualitatively and quantitatively compared to any other compounds," she says.


'/>"/>

Contact: Jenni Metcalfe, Econnect Communication
jenni@econnect.com.au
61-408-551-866
Econnect Communication Pty Ltd.
Source:Eurekalert

Related biology news :

1. Are methane hydrates dissolving?
2. Bed bugs, stink bugs headline Entomology Meeting in Hartford, Conn.
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/22/2016)... 22, 2016 According ... Market for Consumer Industry by Type (Image, Motion, ... (Communication & IT, Entertainment, Home Appliances, & ... to 2022", published by MarketsandMarkets, the market ... reach USD 26.76 Billion by 2022, at ...
(Date:3/17/2016)... LONDON , March 17, 2016 ... market intelligence, forecasts the global biometrics market will ... an impressive 118% increase from 2015. Consumer electronics, ... with embedded fingerprint sensors anticipated to reach two ... Dimitrios Pavlakis , Research Analyst ...
(Date:3/14/2016)... March 14, 2016 http://www.apimages.com ... --> - Renvoi : image disponible via ... --> --> DERMALOG, le ... de nouveaux lecteurs d,empreintes digitales pour l,enregistrement des ... sera utilisé pour produire des cartes d,identité aux ...
Breaking Biology News(10 mins):
(Date:4/28/2016)... April 28, 2016 The report ... Brayton Cryocoolers), Service (Technical Support, Product Repairs & Refurbishment, ... Global Forecast to 2022", published by MarketsandMarkets, the global ... by 2022, at a CAGR of 7.29% between 2016 ... Tables and 94 Figures spread through 159 Pages and ...
(Date:4/28/2016)... ... 2016 , ... Morris Midwest ( http://www.morrismidwest.com ), a division ... its Maple Grove, Minnesota technical center, May 11-12. The event will feature ... 20 leading suppliers of tooling, accessories, software and other related technology will participate ...
(Date:4/27/2016)... VANCOUVER, British Columbia , April 27, 2016 ... "Gesellschaft" oder "NanoStruck") (CSE: NSK) (OTCPink: NSKQB) ( ... sie im Anschluss an ihre Pressemitteilung vom 13. ... Inc. erhalten hat, ihre Finanzen um zusätzliche 200.000.000 ... auf 4.000.000 Kanadische Dollar zu bringen. Davon wurden ...
(Date:4/27/2016)... Manitoba (PRWEB) , ... April 27, 2016 , ... ... released for simultaneous preclinical PET (Positron Emission Tomography) and MRI (Magnetic Resonance Imaging) ... better understanding disease and testing novel treatments in small animal subjects. Simultaneous PET/MRI ...
Breaking Biology Technology: