Saturday, September 14, 2013

Biomass energy

Biomass is biological material derived from living, or recently living organisms. It most often refers to plants or plant-derived materials which are specifically called lignocellulosic biomass.As a renewable energy source, biomass can either be used directly via combustion to produce heat, or indirectly after converting it to various forms of biofuel. Conversion of biomass to biofuel can be achieved by different methods which are broadly classified into: thermal, chemical, and biochemical methods.

Biomass is all biologically-produced matter based in carbon, hydrogen and oxygen. The estimated biomass production in the world is 146 billion tons a year, consisting of mostly wild plant growth.
Based on the source of biomass, biofuels are classified broadly into two major categories. First generation biofuels are derived from sources such as sugarcane and corn starch etc. Sugars present in these biomass are fermented to produce bioethanol, an alcohol fuel. Which can be used directly in a fuel cell to produce electricity or serve as an additive to gasoline.

When farmers in Nepal want to cook, use a lamp or heat their simple houses, renewable energy often comes into play. Biogas plants are to help the farmers make do without wood, the traditional energy source that covers 75% of total energy needs. The government of Nepal has launched a biogas programme with German help. So far, 100,000 biogas plants have been built. It is planned to treble this number by 2009. Farmers who keep livestock profit doubly from the clean energy: the plants supply them with gas for their stoves and lamps and the composted sludge can be used on the fields as natural fertilizer. Nepal’s industry has also discovered the biogas sector. Jobs are being created in small firms that build and maintain the biogas plants.

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