Showing posts with label organic waste. Show all posts
Showing posts with label organic waste. Show all posts

Wednesday, January 27, 2010

organic waste


Organic waste in towns and cities is generated by households, businesses, industries and local authorities. It consists of kitchen waste (e.g. potato peelings), waste food (e,g, leftovers in restaurants, spoiled fruit and vegetables from markets), garden waste (e.g. grass clippings and hedge trimmings) and industrial waste (e.g. from agricultural and food processing factories). Of course agriculture produces vast quantities of organic waste such as rice husk, straw and manure. However, this rarely becomes mixed with domestic or commercial organic waste so is not discussed in this brief. In addition, most farmers compost it themselves, as do many urban and peri-urban nurseries.

organic waste


Organic waste
Organic waste is a major component of municipal solid waste. Most originates from household waste but commercial, institutional and industrial waste can also contain significant proportions of organic waste e.g. market waste. Organic waste is biodegradable and can be processed in the presence of oxygen by composting or in the absence of oxygen using anaerobic digestion. Both methods produce a soil conditioner, which when prepared correctly can also be used as a valuable source of nutrients in urban agriculture. Anaerobic digestion also produces methane gas an important source of bio-energy