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Peat as Biomass Fuel

Upon drying, peat can be used as a fuel. It has industrial importance as a fuel in some countries, such as Ireland and Finland, where it is harvested on an industrial scale. In many countries, including Ireland and Scotland, where trees are often scarce, peat is traditionally used for cooking and domestic heating. In Ireland, large-scale domestic and industrial peat usage is widespread. Specifically in the Republic of Ireland, a state-owned company called Bord na Móna is responsible for managing peat production. It produces milled peat which is used in power stations. It sells processed peat fuel in the form of peat briquettes which are used for domestic heating. These are oblong bars of densely compressed, dried and shredded peat. Briquettes are largely smokeless when burned in domestic fireplaces and as such are widely used in Irish towns and cities where burning non-smokeless coal is banned. In Finland, peat (often mixed with wood at an average of 2.6%) is burned in order to produce...
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Biomass Densification

Image via Wikipedia In a typical biomass pre-processing facility, feedstock arrives at the plant in chops or bales.  The bales are cut into short pieces using a hydraulic piston pressing the fodder against a grid of knives. The bales can also be shredded using a roller and knife arrangement. If the moisture is more than 15%, the chopped biomass is dried in a drum dryer. Loose cut biomass has a low bulk density ranging from 50 to 120 kg/m 3  depending on the particle size. In case of chopped and ground biomass, the bulk density can be increased substantially (~ 25%) by vibrating the biomass holder (e.g. truck box, container etc.). The biomass must be mechanically compacted to increase its density as densified biomass, such as briquettes, cubes, and pellets, has densities in the range of 300 to 700 kg/m 3 . Pellets are usually in the form of a hardened biomass cylinder, made by extruding ground biomass through round or square cross sectional dies. The unit density of ...
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Vermicomposting

Image via Wikipedia Vermicomposting is a type of composting in which certain species of earthworms are used to enhance the process of organic waste conversion and produce a better end-product. Vermicomposting is a mesophilic process utilizing microorganisms and earthworms. Earthworms feeds the organic waste materials and passes it through their digestive system and gives out in a granular form (cocoons) which is known as vermicompost. Like regular compost, vermicompost also benefits the environment by reducing the need for chemical fertilizers and decreasing the amount of waste going to landfills/dumpsites. Vermicompost is primarily earthworm excrement, called castings, which can improve biological, chemical, and physical properties of the soil. The chemical secretions in the earthworm’s digestive tract help break down soil and organic matter, so the castings contain more nutrients that are immediately available to plants. Earthworms consume various organic wastes and reduce...
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