Biodrying is the process by which

biodegradable waste Biodegradable waste includes any organic matter in waste which can be broken down into carbon dioxide, water, methane or simple organic molecules by micro-organisms and other living things by composting, aerobic digestion, anaerobic digestion ...

is rapidly heated through initial stages of

composting Compost is a mixture of ingredients used as plant fertilizer and to improve soil's physical, chemical and biological properties. It is commonly prepared by decomposing plant, food waste, recycling organic materials and manure. The resulting ...

to remove moisture from a waste stream and hence reduce its overall weight. In biodrying processes, the drying rates are augmented by biological heat in addition to forced aeration. The major portion of biological heat, naturally available through the aerobic degradation of organic matter, is utilized to evaporate surface and bound water associated with the mixed sludge. This heat generation assists in reducing the moisture content of the biomass without the need for supplementary fossil fuels, and with minimal electricity consumption. It can take as little as 8 days to dry waste in this manner. This enables reduced costs of disposal if landfill is charged on a cost per tonne basis. Biodrying may be used as part of the production process for refuse-derived fuels. Biodrying does not however greatly affect the

biodegradability Biodegradation is the breakdown of organic matter by microorganisms, such as bacteria and fungi. It is generally assumed to be a natural process, which differentiates it from composting. Composting is a human-driven process in which biodegradati ...

of the waste and hence is not stabilised. Biodried waste will still break down in a landfill to produce

landfill gas Landfill gas is a mix of different gases created by the action of microorganisms within a landfill as they decompose organic waste, including for example, food waste and paper waste. Landfill gas is approximately forty to sixty percent methane ...

and hence potentially contribute to climate change. In the UK this waste will still impact upon councils

LATS Lats or LATS may refer to: * Latissimus dorsi muscle * Latvian lats, former currency of Latvia * Latin American Test Symposium of test and fault tolerance technologists * Landfill Allowance Trading Scheme, a UK scheme to reduce biodegradable waste ...

allowances. Whilst biodrying is increasingly applied within commercial

mechanical biological treatment A mechanical biological treatment (MBT) system is a type of waste processing facility that combines a sorting facility with a form of biological treatment such as composting or anaerobic digestion. MBT plants are designed to process mixed househ ...

(MBT) plants, it is also still subject to on-going research and development.

References

{{Reflist, 2 Biodegradable waste management Industrial composting Waste treatment technology

See also

References