Monday, April 25, 2011

Biomass, Biofuels and Biogas

In recent years there has been a lot of interest in renewable and alternative energy sources. This has seemingly become an even bigger issue in the wake of the Japanese nuclear crisis, where the nuclear plant at Fukushima was damaged by the earthquake and resultant tsunami on March 11th. There is now a real danger that harmful radiation could escape from the site. People have always been uncertain of the safety of utilising nuclear power and such a scare only serves to heighten their concerns. That is why increasingly people are looking for alternatives. One such alternative is the use of biofuels.

What are Biofuels?

The term 'biofuel' refers to a broad range of fuels that are created from 'biomass' (see below). Biofuels are often used as an additive rather than as a 'pure' fuel. Bioethanol is an example of this. It is an alcohol created by fermenting the sugar components of plant materials and whilst ethanol can be used as a fuel for cars in its purest form, it is normally added to petrol to improve the emissions from the vehicle and increase octane.

Ok, so what is Biomass?

Biomass is a renewable energy source. It refers specifically to biomaterials from living organisms and recently living organisms - examples of which are wood, waste and alcohol fuels. There are actually several different sources of biomass energy, so in addition to the three just mentioned, there are: garbage and landfill gases. There are a few different mechanisms by which biomass can be converted to energy:

Thermal Conversion

This involves the use of heat in order to convert biomass into an alternative chemical form. There are different forms of thermal conversion - two examples of which are torrefaction and pyrolysis.

Chemical Conversion

This is quite simply where a range of chemical processes are used in order to convert biomass to alternative forms.

Biochemical Conversion

This involves harnessing the power of naturally occurring biochemical conversion processes. Microorganisms are used to break down biomass - Anaerobic Digestion is an example of this.

Biogas

Biogas is a type of biofuel that is produced by anaerobic digestion or fermentation of biodegradable materials, including biomass. Biodegradable waste can, for example, be converted to methane - which is a renewable energy source.

So are Biofuels the answer?

It remains to be seen whether or not biofuels are a long term solution to the problems surrounding the energy industry. There are certainly discussions to be had about the impact that the production of biofuels has on carbon emissions and biodiversity, but these are certainly not the only issues.

Projen Project Management Consultants are experts in Anaerobic Digestion and Biogas: http://www.projen.co.uk/

Article Source: http://EzineArticles.com/?expert=Peter_Iranha

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Saturday, April 9, 2011

Biofuel Technology - The Cost of Alternative Energy

Certainly consumers are concerned with escalating fuel prices as well as what fossil fuels are doing to the environment. The concern has led many consumers to find out more about alternative energy sources in the way of solar power, wind power and biofuel technology. However, are these technologies new? Certainly not - although now that energy is such a concern the technologies relative to biofuels, wind and solar can no longer be put on the back shelf. That said, this technology is a very old alternative energy solution. The costs of biofuel technology have to be looked at before solutions can be found.

The creation of a biofuel is not some sort of complex science. In order to create a biofuel the following needs to occur. First you will need to take some form of grain or vegetable and thoroughly grind it up. The grain or vegetable is then mixed with water. The grain or vegetable and water is then cooked for a very short length of time. During this short period of cooking time an enzyme is added to the mixture in order that the starch may be subsequently convert to sugar. The cooking process just described is referred to as Hydrolysis.

You next add some yeast. The yeast is necessary in order that the mixture can ferment. The fermentation of the mixture results in the production of Ethanol. A distillation process is applied in order to separate the Ethanol from the other ingredients. You may not be aware of it, but currently with the concern regarding diminishing fossil fuels and the threat they present to the environment there are a fair amount of websites showing various ways to manufacture the product of Ethanol at home. Even though the steps do not sound all that significant there is truly a great deal of time involved and a good deal of work. Further, some have mentioned it is not all that cost-effective to produce Ethanol at home.

However, on a larger scale a good deal of time and financial resources is being spent currently with respect to manufacturing methods pertinent to biofuels. In example, researchers are looking for ways to produce Ethanol by means that prove less expensive than what is incurred when using grains. This assures food sources are not used too frequently. It is not necessary for part of the population go hungry due to the fact food sources are being used over-extensively in the way of biofuel manufacture. Countries that have been manufacturing biofuels for a relatively long time now grow food products high in sugar content; one example of such a food product is sugar cane. Brazil is one country that grows a considerable amount of sugar cane. Brazil has also been producing biofuels for quite a while now.

It may be said, the majority of Ethanol used commercially is the result of manufacture using the by-product yeast. Ethanol is manufactured as well wherein gasoline is used within the production process. However, the majority of Ethanol produced is the result of using yeast. In manufacturing biofuels corn is considered in areas such as North America where its harvest is generous. However, though corn is generally used in the production of biofuels the process is pricey and the conversion into biofuel a good deal more detailed.

Greg has been writing articles for over 5 years. Please visit his latest website about renewable energy ideas at Alternative Energy Sources, with great information and thoughts surrounding Costs of Biofuel Technology.

Article Source: http://EzineArticles.com/?expert=Greg_Parsons

Article Source: http://EzineArticles.com/6041309

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