Green Options » microbiology

Biofuel to be Made from Tuberculosis Bacteria

Bryan Nelson — Tue, 29 Sep 2009 00:01:23 +0000

A team of researchers at MIT are engineering a strain of bacteria, which is similar to the type that causes tuberculosis, to produce biofuel.

The researchers say that the bacteria are useful because they are hungry for a number of sugars and toxic compounds and produce lipids that can be converted to biodiesel.

Animals, Environment, Children and Risk

Kay Sexton — Wed, 23 Sep 2009 11:02:49 +0000

The UK is undergoing a small crisis of parenting at present. The reason is that there has been an outbreak of E.coli, in one of its most virulent forms: 0157, which causes kidney damage in a small proportion of people contracting it, and the outbreaks have been linked to two city farms visited by children with their parents or as part of school groups.

City Zoos linked to disease outbreak

Forty-nine cases of E.coli have been linked to Godstone Farm in Surrey which has been closed, and its fellow site Horton Park Children’s Farm in Epsom, Surrey has closed voluntarily. Other sites have closed in Nottingham and Devon. In Exmouth, Devon, a petting farm has closed after three children became ill, although there hasn’t been a direct link from their illness to a visit to the site.

However, in responding to the concerns, there appears to be a division of opinion in the governmental ranks. Professor Hugh Pennington who was chair of the Pennington Group enquiry into the Scottish Escherichia coli outbreak of 1996 and Chairman of the Public Inquiry into the 2005 Outbreak of E.coli O157 in South Wales, says parents should not allow under-fives to touch animals on farms. But the Department of Health (DoH) is maintaining that its current advice still stands: contact with animals is okay if good hand hygiene is undertaken.

Youngsters most at risk of harm

The concern is partly that very young children haven’t learned good hand hygiene and so are not good at washing their hands, and also that they are more prone to complications from E.coli than adults. But there is a counter-argument being made by some health professionals that a child’s immune system is only built if it is given enough exposure to the wider world and depriving children of this kind of contact actually harms their ability to battle a range of viruses and infections.

One solution could be to provide better systems of hygiene, such as nail brushes that would allow people to ensure that they removed every lurking trace of the bacterium from their hands. It is impossible to remove E.coli risk entirely from animals or their environment, even though most strains of the disease are very short lived outside the gut which is their natural habitat. So parents must decide whether to give their children the chance to get to meet animals, to improve their knowledge and development and to boost their immune systems through contact with the wider environment, or to reduce the risk of exposure to E.coli by avoiding such experiences as city zoos and agricultural or wild animals, altogether.

City Farm photograph author’s own

Micro-Organisms Can “Predict” Enviro Changes, Proving Basic Assumptions Wrong

Michael Ricciardi — Tue, 28 Jul 2009 19:15:58 +0000

Scanning electron micrograph of Escherichia coli

Using two different model organisms–the E. coli bacterium and the single-celled yeast–scientist have begun unraveling a puzzling behavior of many micro-organisms: the ability to “predict” a change in environmental conditions.

It has been assumed for most of the history of micro-biological science that such micro-organisms are purely “reflexive”; they simply respond and adapt to external stimuli (such as exposure to chemicals, heat stress, or drugs). But research over he past 2 years by two different scientific teams (a Princeton team lead by Saeed Tavazoie, and, a team from the Weizmann Institute in Israel) is shaking up present understanding and over-turning basic assumptions.

GM Announces Biofuel Partnership with Coskata: Cheap, Green Ethanol?

Clayton B. Cornell — Sun, 13 Jan 2008 12:00:06 +0000

LIVE FROM DETROIT AUTO SHOW: GM ANNOUNCES PARTNERSHIP WITH BIO-BASED ETHANOL PRODUCER COSKATA BIOFUELS TO RAPIDLY COMMERCIALIZE AND DISTRIBUTE ETHANOL FOR FLEXFUEL VEHICLES.

At noon today, General Motors announced an undisclosed equity share in Coskata, Inc., a renewable energy company with the means to produce low-cost ethanol from virtually any carbon-containing feedstock including biomass, municipal solid waste—even used car tires. GM believes Coskata has the premier technology for rapidly implementing ethanol production technology worldwide. Click here for a video of the announcement.

GM already has a vested interested in ethanol, with 2.5 million FlexFuel model vehicles already on the road (15 models planned for 2009), and plans to make half their fleet ethanol-ready by 2012. The partnership is a win-win situation as Bill Roe, President and CEO of Coskata puts it: “GM is enabling Coskata to produce the next generation of biofuels - without using a food source - making it economically viable and commercially available.”

GM will test Coskata’s ethanol at the Milford Proving Grounds by late 2008, followed by completion of a 40,000 gallon per year commercial demonstration facility by the end of the year. A larger, 100 million gallon per year facility is currently being sited for construction in the U.S.

Coskata claims it can produce ethanol for under $1.00 per gallon from almost any carbon-containing feedstock, while reducing greenhouse gas emission by 84% compared to gasoline, using only 1 gallon of water for each gallon ethanol produced, and returning 7.7 times as much energy as is used in the production process.