Sludge treatment process and disposal, Biology

Sludge treatment and disposal: most of the suspended solids and some of the dissolved organic solids, in a converted form, are separated from the main flow of the, in the form of sludge. The quantity and the characteristics of sludge depend upon its origin. In general, the sludge contains 92-98% of moisture. The higher organic content of the sludge demands further treatment prior to its final disposal either on land or into the sea.          

Sludge treatment process:  sludge treatment may include all or a combination of the following unit operation and process-

        (1) Thickening (2) digestion (3) conditioning (4) dewatering (5) incineration

  • Thickening is meant for the reduction of moisture content of the sludge.
  • Digestion is a biological method of treatment and is meant of the reduction of organic content of the sludge. The digestion may be accomplished under either aerobic or anaerobic conditions.
  • Condition improves the drainability of the digested sludge, and may be accomplished by any of the following process like elutriation, chemical conditioning, heat treatment; freezing etc. chemical conditioning consists of addition of some coagulants like ferric chloride, lime, alum etc.
  • Dewatering is accomplished either by air drying in sand, drying beds, or by mechanical means using vacuum filtration, heat drying, centrifugation etc.
  • Dewatered sludge may sometimes require further treatment such as incineration.
  • The ultimate disposal of dewatered sludge after incineration may be on to the land or into the sea.

 

 

Posted Date: 7/12/2012 12:52:53 AM | Location : United States







Related Discussions:- Sludge treatment process and disposal, Assignment Help, Ask Question on Sludge treatment process and disposal, Get Answer, Expert's Help, Sludge treatment process and disposal Discussions

Write discussion on Sludge treatment process and disposal
Your posts are moderated
Related Questions
Define the Growth Charts of Infant? Besides identifying growth faltering, growth charts also provide the following information: 1) The growth is considered normal or satisfa

Assessment of new born The main purposes are: i) To identify normal characteristics in the neonate ii) To identify existing abnormalities, ii any iii) To carry

Oligomeric enzymes Oligomeric proteins consist of two or more polypeptide chains, which are usually linked to each other by non-covalent interactions and never by peptide bonds

Plant sources Although there is a multitude of colours in the plant kingdom, their extraction and use in food systems is not an easy task. Unless the colourants have some outst

list the major species of echinodermata

What is reverse osmosis? Give its one application. Which two heart sounds are heard through the stethoscope when placed on the chest? When are these sounds produced respectivel

Menerals are naturally occurring inorganic solids with a crystalline structure and a definite range of chemical formula. Ores are concentrations of minerals in rock.

Leptospirosis Leptospirosis is a general term that denotes all infections of man and animals caused by spirochaetes of the genus Leptospira. At one time, the infection had bee

parts and functions of the anther

A bee visits several flowers in succession on a single willow herb plant. In doing so, the bee transfers pollen from the younger flowers, near the top of the inflorescence (group o