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

Explain fats requirements during thyphoid, Explain fats requirements during...

Explain fats requirements during thyphoid Fats: Use of fats should be in moderation. This is because the typhoid patient has a compromised ability to digest and assimilate due

Define intravascular fluid compartment - extracellular fluid, Explain intra...

Explain intravascular fluid compartment - extracellular fluid? The extracellular fluid compartment is sub-divided into the intravascular fluid compartment (fluid within the blo

State the term - vibrio parahaemolyticus gastroenteritis, Vibrio parahaemol...

Vibrio parahaemolyticus gastroenteritis While most other known food poisoning syndromes may be contracted from a variety of foods,  V. parahaemolyticus gastroenteritis is contr

Pathophysiology and medical mangement of acute renal failure, Pathophysiolo...

Pathophysiology of Acute Renal Failure It is usually reversible but the deviation of physiologic function can be extreme and mortality in pediatric age group remains high. Th

Relaxin - reproduction, Normal 0 false false false EN-I...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

What is mitochondria , What is Mitochondria ? Mitochondria are the cell...

What is Mitochondria ? Mitochondria are the cellular organelles responsible for the conversion of energy into a form called ATP. ATP is a high energy chemical compound that cel

Describe st segment depression, Q. Describe ST Segment Depression? The ...

Q. Describe ST Segment Depression? The development of ST-segment depression with exercise is probably the most reliable sign if myocardial ischaemia and appears to be the most

#ti ZOOLOGY , WHAT ARE SOME INFORMATION ABOUT HUMAN ZOOLOGY?

WHAT ARE SOME INFORMATION ABOUT HUMAN ZOOLOGY?

How does phosphocreatine act in the muscle relaxation, Q. How does phosphoc...

Q. How does phosphocreatine act in the muscle relaxation and contraction? Phosphocreatine is the major means of energy storage of the muscle cells. During relaxed periods AT

What is schistosomiasis, Q. What is schistosomiasis? The Schistosomiasi...

Q. What is schistosomiasis? The Schistosomiasis is a worm infection caused by schistosomes, a species of flatworms (platyhelminthes). The disease is common in Latin America and

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