Navigation Links
Charcoal biofilter cleans up fertilizer waste gases
Date:10/14/2010

Removing the toxic and odorous emissions of ammonia from the industrial production of fertilizer is a costly and energy-intensive process. Now, researchers in Bangladesh have turned to microbes and inexpensive wood charcoal to create a biofilter that can extract the noxious gas from vented gases and so reduce pollution levels from factories in the developing world.

Writing in the International Journal of Environment and Pollution, Jahir Bin Alam, A. Hasan and A.H. Pathan of the Department of Civil and Environmental Engineering, at Shahjalal University of Science and Technology, in Sylhet, explain that biofiltration using soil or compost has been used to treate waste gases for the last two decades. There are simple filters for reducing odors and more sophisticated units for removing specific chemicals, such as hydrogen sulfide, from industrial sources.

Among the many advantages are the fact that biofiltration is environment friendly technology, resulting in the complete degradation by oxidation of toxic pollutants to water and carbon dioxide without generating a residual waste stream. It also uses very little energy. Biofilters are widely used in the developed world but their use in the developing world which is rapidly being industrialized but not necessarily considering pollution control.

The Shahjalal team has now built a prototype biofilter for ammonia extraction based on wood charcoal in which the nitrogen-fixing microbe Nitrosomonas europaea has been grown. This microbe derives all its energy for metabolism, growth, and reproduction from ammonia, which it absorbs and oxidizes to nitrite. The microbe is commonly found in soil, sewage, freshwater, and on buildings and monuments in polluted cities.

The team found that their prototype biofilter could function at an ammonia concentration of 100 to 500 milligrams per liter of gas and remove the ammonia from this gas stream almost completely. Approximately 93% removal of ammonia gas was seen within seven days.


'/>"/>

Contact: Jahir Bin Alam
jahiralam@yahoo.com
Inderscience Publishers
Source:Eurekalert

Related biology news :

1. Charcoal takes some heat off global warming
2. Pitt researcher says simple polymer-based filter successfully cleans water, recovers oil in Gulf of Mexico tests
3. Polymer-based filter successfully cleans water, recovers oil in Gulf of Mexico test
4. Genetically engineered tobacco plant cleans up environmental toxin
5. LLNL technology cleans up Visalia Superfund 100 years ahead of schedule
6. Cleansing toxic waste -- with vinegar
7. Fertilizer chemicals linked to animal developmental woes
8. Discovery in legumes could reduce fertilizer use, aid environment: Stanford researchers
9. Fertilizer use not always helpful in revegetation efforts
10. Sustainable fertilizer: Urine and wood ash produce large harvest
11. Water quality improves after lawn fertilizer ban, study shows
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/23/2016)... 2016 Einzigartige ... und Stimmerkennung mit Passwörtern     ... MESG ), ein führender Anbieter digitaler Kommunikationsdienste, ... SpeechPro zusammenarbeitet, um erstmals dessen Biometrietechnologie einzusetzen. ... Möglichkeit angeboten, im Rahmen mobiler Apps neben ...
(Date:3/22/2016)... and SANDY, Utah , ... which operates the highest sample volume laboratory in ... Genomics and UNIConnect, leaders in clinical sequencing informatics and ... launch of a project to establish the informatics infrastructure ... NSO has been contracted by the Ontario ...
(Date:3/18/2016)... 2016 --> --> ... Manned & Unmanned Vehicles, Physical infrastructure and Perimeter Surveillance & ... the border security market and the continuing migration crisis in ... Europe has led visiongain to publish this unique ... --> defence & security companies in the border ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... , ... June 23, 2016 , ... ... announced the launch of the Supplyframe Design Lab . Located in Pasadena, ... explore the future of how hardware projects are designed, built and brought to ...
(Date:6/23/2016)... Calif. , June 23, 2016  Blueprint Bio, ... biological discoveries to the medical community, has closed its ... Matthew Nunez . "We have received ... with the capital we need to meet our current ... essentially provide us the runway to complete validation on ...
(Date:6/23/2016)... ... June 23, 2016 , ... Regulatory Compliance Associates® Inc. ... a free webinar on Performing Quality Investigations: Getting to Root Cause. ... at no charge. , Incomplete investigations are still a major concern to the ...
(Date:6/22/2016)... 2016 Cell Applications, Inc. and StemoniX ... produce up to one billion human induced pluripotent ... week. These high-quality, consistent stem cells enable researchers ... spend more time doing meaningful, relevant research. This ... manufacturing process that produces affordable, reliable HiPSC for ...
Breaking Biology Technology: