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Largest U.S. Biodiesel Refinery Takes Quality Control to New Level...

Cognis Corporation, through its QTA System business, recently announced that its biodiesel quality testing system was selected by GreenHunter BioFuels, Inc., a wholly-owned subsidiary of GreenHunter Energy, Inc. (AMEX: GRH), to help it reduce the cost and improve the integration of its quality control process. GreenHunter's refinery, located along the Houston Texas Ship Channel, is a 105 million gallon/year nameplate biodiesel refinery with approximately 700,000 barrels of bulk storage capacity.

"Biodiesel quality testing traditionally requires gas chromatographs and a trained chemist" said Kerry Staller, Corporate Engineer with GreenHunter. "As such. quality control is difficult to integrate with operations because testing needs to be done in a separate lab by a chemist with the results coming up to an hour after a sample was taken. But with Cognis' QTA System, our operators are able to conduct the quality tests right in the control room and see easy-to-understand results that they can act upon--all in less than 2 minutes after the sample is taken."

Barbara Stefl, Cognis' Global Business Director, said, "One of the benefits of our fast biodiesel testing process is that quality testing and general operations can now be more tightly linked. Efficiencies improve due to reduced handoffs between chemists and operators and quality increases due to the ease of doing more frequent testing."

Cognis' QTA patented Biodiesel Analysis starts by digitizing the light spectra of a fresh biodiesel sample using proven infrared technology. Those spectra are then sent, via the internet, to Cognis' central database where algorithms convert the spectra, in real-time, into highly accurate standard quality measurements that are viewed online by plant personnel. All this occurs in less than two minutes.

Cognis' QTA system is offered on a subscription basis and does not require any capital investment. The annual subscription includes an easy-to-use infrared spectrometer, software for a standard PC and unlimited use of Cognis' Chingometric centrally-calibrated algorithms that covert the light spectra into actionable quality data.

About QTA

QTA is a service business of Cognis Corporation -a worldwide supplier of innovative specialty chemicals and nutritional ingredients, with a particular focus on the areas of wellness and sustainability. The company employs about 7,700 people, and it operates production sites and service centers in 30 countries.Cognis' QTA business provides on-site, ready-to-use analytical capabilities without additional investment in equipment or personnel. Patented, centralized calibration technology enhances accuracy. For more information on the QTA system, visit www.qta.com.

Cognis is owned by private equity funds advised by Permira, GS Capital Partners, and SV Life Sciences. In 2006, Cognis recorded sales of 3.37 billion euros and an Adjusted EBITDA (operating result) of 394 million euros.

About GreenHunter Energy

GreenHunter Energy is focused on the renewable energy sectors of wind, hydro, geothermal, solar, biofuels, and biomass power plants. Our assets consist of leases of real property for future development of wind energy projects located in Montana, New Mexico, Wyoming, California, Texas, and China, the nation's largest biodiesel refinery located in Houston, Texas, and a cow manure-fired power plant located in El Centro, California. Headquartered in Grapevine, Texas, GreenHunter Energy was formed to be the first publicly traded renewable energy company based in the U.S. that provides to investors a portfolio of diversified assets in the alternative energy sector. Additional information about GreenHunter Energy may be found at www.greenhunterenergy.com. For Further Information Contact: GreenHunter Energy, Inc., Jack W. Zedlitz, 1048 Texan Trail, Grapevine, TX 76051, Tel: (972) 410-1044.

Media Contact:                 

Tony Collins @ 513-404-2810

Company Contact:

Barbara Stefl @ 513-482-3135

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