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:1/11/2016)... CHICAGO , Jan. 11, 2016  higi, ... via nearly 10,000 retail locations, web and mobile, ... than $40 million from existing investors. ... will be devoted to further innovate higi,s health ... app and web portal – including expanding services ...
(Date:1/7/2016)... , Jan. 7, 2016 This BCC Research ... for biometric technologies and devices, identifying newer markets and ... various types of biometric devices. Includes forecast from 2015 ... Identify newer markets and explore the expansion of the ... Examine each type of biometric technology, determine its current ...
(Date:1/6/2016)... 2016  Varam Capital, a provider of micro-finance inclusion ... deliver advanced authentication solutions to their clients. Varam supplies ... A loan of a few thousand rupees may make ... ability to purchase livestock or equipment for a small ... for a local store. ...
Breaking Biology News(10 mins):
(Date:2/4/2016)... ... February 04, 2016 , ... Franz Inc. ... Graph Database technology has been recognized As “ Best in Semantic Web Technology ... , “At Corporate America, it’s our priority to showcase prominent professionals who are ...
(Date:2/3/2016)... LONDON , Feb. 3, 2016  With ... current patent cliff that is underway, therapies such ... vaccines for a whole host of indications are ... to aid in the development and production of ... yields, poor quality and high costs, novel approaches ...
(Date:2/3/2016)... (PRWEB) , ... February 03, 2016 , ... ... validating a series of potential targets (epitopes) specific to misfolded, propagating strains of ... to create specific monoclonal antibody therapeutics for Alzheimer’s. , Following on from the ...
(Date:2/3/2016)... Buffalo, NY (PRWEB) , ... February 03, 2016 ... ... several new products to aid in the rapid development and ongoing quality control ... the Zika Virus outbreak is extremely high,” Dr. Gregory R. Chiklis, President and ...
Breaking Biology Technology: