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Tapping Hydroelectric Dams for Methane Gas

by Mario Osava

RIO DE JANEIRO, (IPS/IFEJ) - Hydroelectricity is not as clean as most people might believe, because the reservoirs created by dams in tropical areas -- and in forested zones in particular -- emit greenhouse gases from the decomposition of organic material. But this downside can be turned into a benefit, and give a boost to the amount of energy generated.

Some hydroelectric plants in the Amazon hold an added energy capacity of 27 to 53 percent, taking into account the methane bubbles released from the water as it passes through the turbines and spillways, says Fernando Ramos, based on a study he and two colleagues from Brazil's National Institute of Space Research (INPE) conducted at the Balbina, Samuel and Tucuruí dams. What his group proposes is to extract methane from the depths of the reservoirs, where there is a higher concentration of the gas.

With an investment of 100 million dollars, one million tonnes of methane a year could be captured at Tucuruí, Brazil's second largest hydroelectric dam, located in the eastern Amazon. The return, considering current prices of the gas, would reach 79 percent, much higher than the 25 percent expected in other Brazilian renewable energy projects.

A million tonnes of methane is the equivalent of 1,760 megawatts -- the potential of a large hydroelectric dam -- and more energy than what would be produced by the third nuclear plant under consideration for construction in this country. As such, methane could replace several hydroelectric dams planned for the Amazon, and which are criticised by environmentalists because they would flood extensive areas of forest and cause other environmental and social problems.

The gas could be stored and transported for use in other areas, but the best option would be to build a thermoelectric plant at the dam site, taking advantage of the existing infrastructure to transmit the electricity, Ramos said in an interview for this report. Furthermore, it is a good way to avoid emissions of the gases that contribute to climate change, which could generate carbon credits and make the project more profitable.

"This technological idea would meet the criteria of the Clean Development Mechanism (CDM)" established in the 1997 Kyoto Protocol on climate change, and could enter the market of carbon credits, agreed Pablo Fernández, manager of CDM project implementation at EcoSecurities, though he admitted he is "not clear on how the methane would be captured." EcoSecurities put together the first Brazilian project that obtained carbon credits, NovaGerar, which extracts gas emissions from a huge garbage dump outside Rio de Janeiro to generate energy.

INPE's Ramos, a mechanical engineer, said "there is no doubt about the feasibility of the technique" for recovering methane from the dams.” The idea is to create a tubing system similar to a pool cleaner, installed on a barge that would move about the reservoir, seeking the areas of highest methane concentration.

The new task that the INPE group hopes to complete by the end of the year is a pilot project to verify its economic viability, he announced. It is "a new idea, not yet made official in the CDM," and needs to "mature" in technical details and an inventory of the methane held in the Brazilian reservoirs, Ramos acknowledged.

 

Genome Guru Seeks Patent on Synthetic Life Form

by Stephen Leahy

BROOKLIN, Canada (IPS) - Patent applications for the world's first-ever human-made species have been made to patent offices around the world.

The Venter Institute, named for its founder and CEO, J. Craig Venter, has applied for a patent on a novel bacterium made entirely from synthetic DNA in the laboratory, according to a civil society organization concerned that this new technology is outpacing ethics and safety protocols.

Applications have reportedly been made to more than 100 patent offices over the past few months for the synthetic bacterium called "Mycoplasma laboratorium".

"In the tradition of 'Dolly,' (the first cloned animal) we have nicknamed this synthetic organism 'Synthia'", said Jim Thomas of ETC Group, a Canada-based organization that recently won a 13-year legal battle against Monsanto's species-wide soybean patent.

"These monopoly claims signal the start of a high-stakes commercial race to synthesize and privatize synthetic life forms," Thomas said. "Will Venter's company become the 'Microbesoft' of synthetic biology?"

While this would be the world's first de novo bacterium, there has been no confirmation by the company of its existence. The Venter Institute did not return phone calls and emails for comment. However, Thomas said an announcement to that effect will likely be made by the Institute later this year.

J. Craig Venter, who gained worldwide fame in 2000 when he mapped the human genetic code, announced the start-up of a company called Synthetic Genomics in 2005. Its goal was to construct new organisms that, among other things, use genes culled from the sea to turn crops such as switch grass and cornstalks into ethanol, produce hydrogen, secrete nonpolluting heating oil or break down greenhouse gases.

"It's a very powerful technology that could be used in a huge range of applications," Thomas said.

In media reports last year, Venter said that if researchers could create a synthetic organism that produced fuel, it could be worth "a trillion dollars" and was something his institute would quickly patent.

Synthetic biology combines biology and engineering to build entirely new biological entities from the ground up. In 2004, a bacteriophage was re-created with synthetic biology by assembling 5,000 base pairs of the fundamental units that make up DNA. The human genome has three billion base pairs, while bacteria have just four million pairs.

This new technology is more akin to software engineering than to biotechnology. In fact, once the technical challenges are overcome, it will be far easier and faster to create new organisms that have specific capabilities. The Venter Institute's synthetic bacterium could be the foundation -- a living foundation -- onto which other specialised genes would be added to create functionality for a variety of applications.

"Think of it as an operating system like Windows," Thomas said.

Venter's patent is vague and claims to include any synthetically-constructed organism that lacks at least 55 of 101 genes researchers believe are non-essential.

"If someone creates another bug that lacks some of the same genes that Synthia lacks, will the Venter Institute sue them for infringing its patent?" asked Kathy Jo Wetter of ETC Group.

There have already been calls in the scientific community to keep the basic technology in the public realm, said Markus Schmidt of the organization for International Dialogue and Conflict Management in Vienna, Austria.

"I think it would be a good idea to start a 'Minimal Genome Project', a large international publicly-funded effort towards providing a functional bacterial chassis that is publicly available and the basis for the creation of biological circuits," Schmidt told IPS.

Civil society has been wary of this new technology from the outset. In 2006, 38 groups released an open letter calling for an international discussion and review of the social, environmental, ethical and economic implications of synthetic biology.

Concerns about using the technology to make bioweapons and the potential for accidents involving the release of these living synthetic organisms have yet to be addressed, say critics.

Schmidt agrees the risks are real. The United States is leading the quest to explore security issues – namely, bio-terrorism -- but so far the unintended consequences for human health, agriculture and environment have received relatively little attention from scientists or policymakers, he said.

The European Commission has funded a new project called "SYNBIOSAFE" to "look into the biosafety, biosecurity and ethical aspects of synthetic biology and contribute to a broader debate on these issues in Europe and abroad", Schmidt said.

Self-regulation proposals brought forward by some experts have been rejected by NGOs, including ETC. For that reason, Schmidt, one of the organisers of an international meeting on the topic, has invited ETC to participate in discussions at the Synthetic Biology 3.0 conference in Zurich later this month.

Experts in ethics, security and patents will look at the societal implications.

Meanwhile, ETC has written to patent offices asking that they reject the Venter Institute application.

"We need a full public debate over the implications of creating synthetic life forms before proceeding any further," said Thomas


For more information: ETC; Synthetic Genomics; organization for International Dialogue and Conflict Management

 

 








   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 


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