Energy News  





.
FARM NEWS
Charcoal Biofilter Cleans Up Fertilizer Waste Gases

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.
by Staff Writers
Washington DC (SPX) Oct 19, 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.




Share This Article With Planet Earth
del.icio.usdel.icio.us DiggDigg RedditReddit
YahooMyWebYahooMyWeb GoogleGoogle FacebookFacebook



Related Links
Inderscience Publishers
Farming Today - Suppliers and Technology



Tempur-Pedic Mattress Comparison

Newsletters :: SpaceDaily Express :: SpaceWar Express :: TerraDaily Express :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News
FARM NEWS
UN expert calls for farming changes
Geneva (AFP) Oct 16, 2010
The United Nations top official on the right to food called for wholesale changes in farming methods to safeguard the environment and ensure everyone has enough to eat. Olivier De Schutter, the UN special rapporteur on the right to food, said in a statement to mark World Food Day that there is currently "little to rejoice about," and "worse may still be ahead." "Current agricultural deve ... read more

.
Get Our Free Newsletters Via Email
  


FARM NEWS
SymetriGEO Supports UK-Led Common Geospatial Tool Set Project

10th Anniversary Of The International Charter Space And Major Disasters

A New Pair Of Glasses To View Earth

Satellites join up to map Earth

FARM NEWS
NKorea Jamming Device A New Security Threat

KORE Telematics Introduces Location-Based Service Offering

Trimble Releases Next Gen Of TerraSync GPS Data Collection Software

EU's Galileo satnav system over budget, late: report

FARM NEWS
Brazil mulls land auction to beat logging

Footage shows land clearing threatens Indonesia tigers: WWF

Litter collected, trees planted for global climate campaign

Deforestation examined in U.N. report

FARM NEWS
Supporting The Advancement Of DoD's Net Zero Energy Initiative

Sunoco To Supply NASCAR With Ethanol-Blended Race Fuel

Rentech's Synthetic RenDiesel Fuels Audi A3 TDI

Farm And Food Industry Groups Oppose EPA Decision On Corn-Based Ethanol

FARM NEWS
Carmanah And Trojan Battery Enter Into Strategic Partnership

GM To Install Solar-Powered EV Charging Stations

DuPont Introduces New Kapton Films For Flexible And Thin Film PV Apps

OPEL Solar Launches New Mk-IX High Concentration PV Solar Panel Technology

FARM NEWS
Wind power to grow massively until 2030

China's wind power capacity to increase five-fold by 2020

Google in major bid for Eastern US wind power

Findings About Wind Farms Could Expand Their Use

FARM NEWS
China mine death toll hits 31 as anger rises over rescue

Hope fades for trapped miners in China after 26 killed

China mine death toll hits 31 as anger rises over rescue

At least 30 Chinese coal miners trapped: state media

FARM NEWS
China VP promoted as party pledges political reform

Xinhua: Nobel committee blind to state of China human rights

Chinese Nobel laureate's wife slams 'illegal house arrest'

Former Chinese communist officials in blunt reform call


The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement