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

Allele-specific ligation, Allele-specific ligation  is the technique permit...

Allele-specific ligation  is the technique permitting discrimination of two allele at locus by giving two short synthetic oligonucleotides which would bind ajjacent to teach other

Techniques of closed heart surgery, Techniques :  Depending on the type of...

Techniques :  Depending on the type of surgery planned, the heart may be approached through median sternotomy, left or right thoracotomy. The problems encountered could be due to

Zoology, what are the physical requirements to become a zoologist?

what are the physical requirements to become a zoologist?

Explain ground system, G round system:  Plant tissue system, composed com...

G round system:  Plant tissue system, composed commonly of parenchyma cells with some collenchyma and sclerenchyma cells, that occupies the space between the epidermis and the va

Residual volume - respiration, Residual Volume - Respiration Norma...

Residual Volume - Respiration Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

What are the three categories of food protein, What are the three categorie...

What are the three categories in which food protein sources can be divided into Protein food sources can be separated into the following three categories: Proteins of pl

Define isolated soybean proteins in seafood products, Define isolated soybe...

Define isolated soybean proteins in Seafood products? The most important application in this category is the use of ISP in fish sausage and surimi based restructured fish produ

Define tests for the presence of exoenzymatic activity, Define Tests for th...

Define Tests for the Presence of Exoenzymatic Activity? Microorganisms require various micro- and macro-nutrients for energy production and growth. These are obtained from the

Preserving foods, One of man's oldest methods of preserving foods is drying...

One of man's oldest methods of preserving foods is drying or desiccation. The preservation of foods by drying is a direct result of removal of moisture. Microorganisms need water

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