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Wastewater Treatment for Steel Industry .pdf



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How to Effectively Treat Wastewater from Steel
Industry
The water usage in the steel industry ranges to a variety of processes and operations; the large
amount of water used in the industry is bound to produce as much of wastewater, containing
suspended solids and many other dissolved substances and chemicals.
The quality of wastewater also depends on processes where the water is used or the purpose of
it. Let’s take a look how wastewater management in steel industry functions and how does
Rochem contributes its bit to make it effortless.

Breaking down the composition of wastewater from Steel
industry
The wastes produced by the steel industry have physical and chemical effects on receiving
streams, which are different from municipal sewage and organic industrial wastes. The
wastewater composition of the industry includes:










Oil and Grease
Total Suspended Solids
Surfactants
Iron
Chromium
Aluminum
Zinc
Chlorides
Sulfates

These constituents of significance are recycled by RO and other treatment processes (which are
mentioned below), to put it back into the industrial process.

Treatment of wastewater
The wastewater from the steel industry is subjected to various treatment options. The basic
treatment of wastewater involves a combination of physical, chemical, biological and operation
for the elimination of solids, organic matter etc. As per the increasing water treatment level, the
treatment degrees are divided into:
1.
2.
3.
4.

Preliminary
Primary
Secondary
Tertiary

1.Preliminary treatment
The coarse solids and other large materials from the raw wastewater are removed by the
process of Preliminary treatment.
2.Primary treatment
Primary Treatment Involves Various Physical-Chemical Processes like:Physical Processes:





Flocculation
Sedimentation
Dissolved Air Floatation
Clarification

Chemical Processes:



Neutralization
Precipitation

3.Secondary treatment
The secondary treatment uses mechanical treatment like:






Activated Sludge Process
Biological filters
Trickling filters
Rotating biological contactors
Anaerobic Treatment systems

4.Tertiary Treatment


Membrane Technology

Considering the sustainability of the environment, the membrane technology is fruitful and is
also result-oriented for the treatment of industrial effluents. Today, this technology has a big
role in wastewater treatment worldwide. During the last few years, the use of membrane
technology has been substantial, along with the growth of a variety of newer versions of
membrane technology.
These steps in wastewater treatment for steel industry plays a crucial role in recycling and
reusing the water resources.
We offer excellent water treatment and recycling technology that adapts to the changing needs
of our customers. Get in touch with us through our mail at sales@rochemindia.net, or leave a
message on our social media accounts - Facebook, Instagram ,LinkedIn and YouTube or call us on
+91 (22) 6704 9000 for any enquiries and further information.


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