Sentences with phrase «wood residues»

Where agricultural crops are favoured over trees, the contribution of forestry may be confined to efficiency gains in current uses and increasing the use of wood residues from existing forestry operations.

At present, it is particularly competitive when using wood residues from the wood processing industry.

Because of widespread illegal logging, production may be under - declared and therefore the extent of wood residues available for energy use may be underestimated.

The volume of wood residues left from harvesting operations in tropical forests is three to six times that generated at mills.

Most forest biomass used for energy in these countries is recovered from indirect sources, including black liquor from wood pulping and other wood residues (Steierer et al., 2007).

Some new techniques for producing biofuels include the production of cellulosic ethanol made from inedible and wasted parts of feedstocks, such as plant stems, leaves and stalks, wood residues such as straw, sawdust and papermill scraps and other agricultural waste.

In developing countries, excess wood residues at mill sites are often left unused and may create environmental problems by affecting water and air quality.

The fiction currently being peddled is that Europe is only burning wood residues — the bits of trees left over from other uses — but new EU rules agreed to last week by the European Parliament will expand the definition of bioenergy to include trees specifically harvested to be burnt in power stations.»

Theoretical analyses of energy supply from wood residues in developing countries suggest that there is considerable potential for energy generation (Tomaselli, 2007).

Table 6 compares wood residue availability for natural forest in the Amazon region and fast - growing pine plantations for two typical industrial operations in Brazil.

Such efficiency is achieved by combined heat and power systems, which use wood to produce both heat and electricity, and by some modern furnaces that burn wood pellets made of dried, ground and pressed wood residues.

In countries such as Cameroon, wood residues generated at mills alone are estimated to be sufficient to supply the total national electricity demand.

Other technologies include power boilers which burn wood wastes from sawmills to generate electricity and gasification, which is the process of heating wood residues to a very high temperature to produce gas that can in turn be burned very efficiently to produce heat and power.

A number of low impact alternative livelihood development options are being promoted, including the harvesting and processing of rattan, fabrication of ornamental furniture from small wood residues left over from timber harvesting, and apiculture.

While previous methods used county - level slash data to estimate the amount of wood residue available as a feedstock, the new research reported in the journal Biomass and Bioenergy, uses more refined data on demand from individual sawmills, said Natalie Martinkus, one of the authors of the paper and an assistant professor in WSU's Composite Materials and Engineering Center.

This is an «engineered wood» product, made from sawdust and other wood residues.

Some new techniques for producing biofuels include the production of cellulosic ethanol made from inedible and wasted parts of feedstocks, like plant stems, leaves and stalks; wood residues such as straw, sawdust and papermill scraps and other agricultural waste.

By definition, residues (e.g., urban wood residues, rights - of - way clearance, construction and demolition wood, pallets, and sawdust shavings from secondary wood processing) are finite and will respond to the prices offered for them.

Many countries have no clear perception of the amount of biomass that can be collected from ongoing forest operations, and have never assessed the full potential of wood residues for energy generation.

Cellulosic ethanol producers also could turn to alternative feedstocks, such as perennial grasses or wood residue, or export electricity from biofuel production facilities to offset emissions from coal - fueled power plants.

The potential contribution of wood residues to total electricity consumption in India, Thailand, Colombia and Peru is relatively small by comparison.

Under these circumstances, the availability of wood for bioenergy production is likely to be less controlled by energy markets than by trends in roundwood production, extent of forest resources and demands that compete for wood residues.

These «biorefineries» will convert widely available, inexpensive, organic materials such as agricultural residues, high - content biomass crops, wood residues, and cellulose in municipal solid wastes into ethanol.

Biomass — Biomass comes from raw materials such as sugar cane, wood residue or soybeans.

These «biorefineries» will convert widely available, inexpensive, organic materials such as agricultural residues, high - content biomass crops, wood residues, and cellulose in municipal solid wastes into valuable and renewable end products.