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Prikazani su postovi s oznakom Using algae for reducing the CO2. Prikaži sve postove

petak, 18. svibnja 2012.

Cutting Carbon Emissions


The 2009 Renewable Energy Directive sets a target for the UK to achieve 15% of its energy consumption from renewable sources by 2020. This compares to only 1.5% in 2005.

But a leaked policy document from the UK government, dated March 2012, wants nuclear power to be given parity with renewables in Europe,

in a move that would significantly boost atomic energy in Britain but downgrade investment in renewable generation.

A national renewable energy action plan for the UK highlighted offshore wind and marine energy as key areas for development in order to help the UK reach the 15% target.


Europe should focus on cutting carbon emissions instead of just repeating the existing EU green policy targets which expire at the end of the decade, Britain's energy and climate chief Edward Davey told a global energy and environment summit.


"We should be moving towards outcome targets," Davey said on Monday (14 May). "Carbon emissions should be the key target."

He was asked whether Britain would support another target for renewable energy when the EU goal to increase the share of green energy in the mix to 20% expires at the end of the decade.

"While we think the renewables target for 2020 is a very good target and we believe we are on track to meet it, in terms of another renewables target, we have to think about what we are trying to achieve here," he replied.

Business, which needs investment certainty, has been putting pressure on the European Commission to come up with policy which can replace the goals that expire in 2020.

Davey said he preferred "outcome targets", such as a new goal on carbon cutting, rather than setting another target for renewables, which are becoming more economically viable.

However, he would not specify what level of new EU carbon target Britain might support. But Britain is already "one of the most ambitious, if not the most ambitious," he added.

Nuclear renaissance

In March, the The Guardian newspaper leaked a document which showed, that the UK government wants nuclear power to be given parity with renewables in Europe, in a move that would significantly boost atomic energy in Britain but downgrade investment in renewable generation.

The UK's renewable energy sector has suffered a series of blows, with an anti-renewables backlash whipped up by right-leaning think tanks and Tory MPs, more than 100 of whom sent a letter to the prime minister attacking renewables and calling on him to cut subsidies from onshore wind farms.

Britain has a national target of reducing carbon dioxide emissions by 34% by 2020 from 1990 levels, compared with an EU-wide goal of a 20% reduction.

Britain also aims to cut CO2 emissions at least 80% below 1990 levels by 2050.

Along with Britain, Poland has also opposed a new EU renewables goal in an attempt to defend its right to burn coal. Poland has also blocked attempts to raise ambition on cutting carbon.

To help reduce carbon emissions from power plants, Britain wants carbon-capture and storage (CCS) technology and last month relaunched a £1 billion CCS funding competition. Later this year or early next year, the government will reveal which projects will sign front-end engineering and design contracts.

The UK government is also ready to support the exploration of shale gas, but has a cautious approach to ensure shale gas fracking was carried out safely.

"I don't think we should close down any options, but to proceed with developing shale gas, one has to make sure one has a very, very robust regulatory regime," Davey stated.

Last month, an independent report advised the British government to continue allowing fracking under stricter reporting guidelines.

The government is due to make an official response to the report after an ongoing consultation period.
CCRES 
special thanks to 
EurActiv.com and Reuters
CROATIAN CENTER of RENEWABLE ENERGY SOURCES (CCRES)

četvrtak, 5. travnja 2012.

Using algae for reducing the CO2


Algae live on a high concentration of carbon dioxide and nitrogen dioxide.  These pollutants are released by automobiles, cement plants, breweries, fertilizer plants, steel plants. These pollutants can serve as nutrients for the algae.
When fuels are burned there remains, besides ash, a certain number of gas components. If these still contain combustion heat, they are called heating gases. As soon as they have conveyed their energy to the absorbing surfaces of a heat exchanger, they are called flue or stack gases.

It further contains a small percentage of pollutants such as particulate matter, carbon monoxide, nitrogen oxides and sulfur oxides.

Carbon dioxide (CO2) 
—the primary greenhouse gas responsible for global warming—along with other pollutants.
Its composition depends on what is being burned, but it usually consists of mostly nitrogen (typically more than two-thirds) derived from the combustion air, carbon dioxide (CO2) and water vapor as well as excess oxygen (also derived from the combustion air).

Using algae for reducing the CO2 concentration in the atmosphere is known as algae-based Carbon Capture technology. The algae production facilities can thus be fed with the exhaust gases from these plants to significantly increase the algal productivity and clean up the air.  An additional benefit from this technology is that the oil found in algae can be processed into a biodiesel. Remaining components of the algae can be used to make other products, including Ethanol and livestock feed.

This technology offers a safe and sustainable solution to the problems associated with global warming.
CCRES SPIRULINA
project of
Croatian Center of Renewable Energy Sources (CCRES)