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Wastewater Treatment
Perfect Pollucon Services

Wastewater Treatment

Wastewater or waste water is the water which is polluted, contaminated or affected in quality. Process of removing contaminants and impurities from wastewater is kown as Wastewater Treatment.

Eg. Used water discharged from homes, farms, industries, offices etc.

The purpose of wastewater treatment is to remove all contaminants from wastewater so that it can meet quality standards announced by pollution control board or to reuse for other purpose. Wastewater treatment process is depends upon the purpose of treated water to be used.

Wastewater Treatment

 

Wastewater treatment processes

As of now there are many processes are available for wastewater treatment but let’s categorise them as physical, chemical and biological. These processes, which consist of series of unit operations, are applied in different permutations, combinations and sequences based on quality of effluent and its purpose of reuse after treatment.

Read More About Effluent treatment Plant and Process

Physical process of Wastewater Treatment

Physical Wastewater treatment processes are very simple and preliminary processes of treatment processes. In these processes contaminants are separated based on their physical properties. These processes mainly comprise sedimentation, air stripping, flotation, screening and filtration.

Chemical process of wastewater treatment

Chemical Processes use chemical properties of impurities or contaminants. Mainly in chemical processes coagulation, disinfection, carbon adsorption, oxidation and reduction, ion exchange, membrane processes and precipitation.

Biological processes of wastewater Treatment

Biological processes utilize biochemical reactions like biological filtration and activated sludge Processes.

Also Learn more about 10 Ways to Reduce consumption of water in Industries

Also Wastewater treatment Processes generally categorized based on quality of water they are expected to produce.

 

Scientifically they can be categorized as Primary treatment, secondary treatment and tertiary treatment. Tertiary wastewater treatment is also called as advanced waste treatment process.

Primary treatment Process

This process comprises pre-treatment step and sedimentation step. It is used to remove large floating and suspended solids which could interfere with subsequent treatment processes. Also in screening process screens of various sizes are used depending upon which solids is need be removed. After screening process water enters in grit chamber for the removal of inorganic grit, consisting cinders, sand, gravel and pebbles.

Secondary Treatment process

In this process Organic matter which is soluble or in colloidal form is removed and where primary process is ineffective in removing it. Here organic material demands high amount of oxygen which must be reduced so that effluent can be discharged in water bodies. Waste water can be treated by decomposing of organic waste, aerobic biological treatment activated sludge process.

Read More About Factors to be considered while designing Effluent Treatment Plant

Tertiary or advanced treatment process

This process may involve physical, chemical and biological processes or their combinations depending upon impurities or contaminants to be removed. Generally these processes are employed to remove residual soluble non-biodegradable organic compounds.

In above all processes advanced or tertiary wastewater treatment Processes are very expensive and are only used when water produced is required to be higher or good quality than that is produced by secondary wastewater treatment process so that it can be put to some form of reuse. The main Goal is to remove Suspended solids, BOD, Plant nutrients, Dissolved Solids and Toxic Substances to certain extent.

Wastewater Released to Environment

 

In India, Main focus of attention in the area of water pollution control is the need to control water-borne diseases like typhoid and cholera. The relatively simple techniques like filtration or chlorination of drinking water can save thousands of lives. Also there is need to control oxygen-consuming wastes so that there would be no harm to water species already present in water-bodies.

Most important cost of necessary programs may sound high initially but considering inherent dangers of releasing wastewater without treatment it is reasonable.

Let us know what you think.

Read More on Wastewater Treatment Plants, AD and Odour Emissions

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7 thought on Wastewater Treatment

  1. Gerardo says:
    at

    I like this topic.

    1. Reynaldo says:
      at

      The topic is interesting. Every country developed or developing countries must treat their waste water for recycling back to the public for consumption. Pollution of water especially on river, lakes, estuaries , can be eliminated by treatment of water.

  2. Mark Sixsmith says:
    at

    Great blog.
    I have made a short English lesson for my students using it:
    http://envenglish.blogspot.com/2014/12/wastewater-treatment.html
    Thank you!
    Mark

    1. Perfect Pollucon Services says:
      at

      Thank you Mark for your valuable feedback & comment. This is very motivational for us. We will try to put some more interesting posts and topics which will help students and professionals understand environmental pollution, monitoring ,health hazards of pollution and tips to reduce it. Trust us your comment & test is highly appreciated.

      Stay Awesome 🙂

  3. virtual hotel says:
    at

    Thanks for sharing your info. I truly appreciate your efforts and I am waiting for
    your further write ups thanks once again.

  4. justseegoods says:
    at

    Superb blog… because its very use for me. Thanks for your sharing.
    Domestic Water Treatment Manufacturers in Coimbatore

  5. advanceclean says:
    at

    I read your blog. It’s a very useful for the wastewater users. Thanks for sharing useful information with us.

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