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Summary Of: Sludge
This collection of solids is known as raw sludge or primary solids and is said to be... fresh sludge is passed through a slot to the lower story or digestion chamber where it is... sludge and may be disposed of by drying and then... the fresh sludge may be continuously extracted from the tank mechanically and passed to separate sludge digestion tanks... Excess solids from biological processes such as activated sludge can be referred to as sludge... Surface water plants also generate sludge made up of solids removed from the raw water... European countries to ban the use of sewage sludge as a fertilizer... the content of cadmium in sewage sludge in major European cities is now only 1... when sewage sludge is used in agriculture... The EC encourages the use of sewage sludge in agriculture because it conserves organic matter and completes nutrient cycles... Sewage sludge is produced from the treatment of wastewater and consists of two basic forms... The sludge is transformed into biosolids using a number of complex treatments such as digestion... the more toxic the sludge is going to be... has been proven when random samplings of treated sludge are found to be filled with heavy metals... Digested sewage sludge can be used as a soil conditioner... instituted a policy of digested sludge reuse on agricultural land... greatly reduces the volume of the sludge and eliminates biohazard concerns... Encyclodia Page On: Sludge
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