Sludge treatment process and disposal, Biology

Assignment Help:

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.

 

 


Related Discussions:- Sludge treatment process and disposal

Predation and coevolution, You now know that natural seleqtion aims at evo...

You now know that natural seleqtion aims at evolving adaptations of organisms in response to environmental changes in the inanimate world. Also many adaptations arise due to intera

What are the signs used in acute pericarditis, Q. What are the Signs used i...

Q. What are the Signs used in acute pericarditis? • Pericardial friction rub is pathognomonic of pericarditis. It is heard as a phasic scatching sound. It may vary with phases

Explain about the physiology of eyelid movements, Explain about the physiol...

Explain about the physiology of eyelid movements. Physiology of Eyelid Movements: It is quoted that the eyelids move more than any other part of the body. The major movem

What is the plant hormone remarkable for stimulating, What is the plant hor...

What is the plant hormone remarkable for stimulating flowering and fruit ripening? What are the uses and practical inconveniences of that hormone? The plant hormone notable for

Explain about the deficiency of riboflavin, Explain about the Deficiency of...

Explain about the Deficiency of Riboflavin? Riboflavin deficiency results in the condition of hypo- or ariboflavinosis, with sore  throat, hyperaemia (condition in which the bl

Explain kingdom monera, Kingdom Monera The monerians are structurally t...

Kingdom Monera The monerians are structurally the simplest of all living things. They have apparently changed little since they first appeared on the earth. Their structure is

Zoogly, are protozoans primitive to life .

are protozoans primitive to life .

Body fluids, why lymph is called the middel man of the body

why lymph is called the middel man of the body

Polyphyletic theory, Please I need short notes on polyphylrtic theory

Please I need short notes on polyphylrtic theory

Thermodynamics and cell shapes, Thermodynamics and Cell Shapes Why are...

Thermodynamics and Cell Shapes Why are protoplasts (cells devoid of cell wall) spherical? Why are most of the unicellular organisms (prokaryotes and eukaryotes) spherical? A s

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd