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1. Assignment
Physical & Chemical treatment of Industrial wastewater
Course Code: TEX-3037
Course Title: Environmental Pollution & its control
Submitted To : Ms. Israt Zerin
Lecturer
Department Of Textile Engineering
Submitted By
1. Mithun Dev Nath (2018000400019)
2. Bijoy deb nath (2018000400020)
3.Mustafizur Rahman prince (2018000400005)
4. Soranjit kumar dey (2018000400006)
5.Md. Shohidujjaman shuvo (2018000400012)
6. Jahid bin ibn Sinha pranto (2018000400053)
Date of submission: 15-01-2021

2. Sl no Name Slide no.
01 Mithun dev nath 3-5
02 Bijoy deb nath 6-7
03 Mustafizur Rahman prince 8
04 Soranjit kumar dey 9
05 Shohidujjaman Shuvo 10
06 Jahid bin ibn Sinha pranta 11-13
SlideDistribution

3. Introduction
Industrial wastewater treatment describes the processes used for treating wastewater that is produced by
industries as an undesirable by-product. After treatment, the treated industrial waste water may be reused or
released to a sanitary sewer or to a surface water in the environment. In Textile industry, waste water
generated by textile dying process contains varying amounts of COD, depending upon the raw chemical & dyes
used. Different types of plant are used for waste water treatment.

4. Wastewater treatmentprocess
Coagulation: Coagulation is an essential process in
water and industrial wastewater treatment. In the area of
potable water treatment, clarification of water with
coagulating agents has been practiced since ancient
times, using a variety of substances the most notable
among them being crushed seeds.
Coagulation is one of the most important
physicochemical operations used in water, and
wastewater treatment can be achieved by chemical and
electrical means.
Fig: Coagulation process
Reff: O.P.SAHU. J. Appl. Sci. Environ. Manage. June 2013 Vol. 17 (2),
P.K.CHAUDHARI

5. Step of Coagulation process
Fig: Step of Coagulation
Sample
Rapid mixed(1-!0 min)
Flocculation (20-45 min)
Sedimentation (1-4 hr)
Filtration
Coagulant
Reff: O.P.SAHU. J. Appl. Sci. Environ. Manage.
June 2013 Vol. 17 (2), P.K.CHAUDHARI

6. Ozonation:
Ozone is an unstable gas comprising of three oxygen atoms, the gas will readily degrade back to
oxygen, and during this transition a free oxygen atom, or free radical form. The free oxygen radical is
highly reactive and short lived, under normal conditions it will only survive for milliseconds.
Ozone is a colorless gas that has an odor similar to the smell of the air after a major thunderstorm.
Reff:Enderson,MS(2013),Wastewatertr
eatment,Mr.Brian Oram, PG

7. MechanismOfOzonaization
Reff: Tuba Turan-Ertas (2000), OZONE SCIENCE & ENGINEERING Vol.
23. pp. 199-206, Taylor & Francis

8. WastewatertreatmentbyScreening:
The materials that are removed using
screens are called screenings. The main
purpose of screening is to remove solid
materials
Reff: Amina Thajudeen, December
17, 2017,wastewater treatment vol.
2,

9. Aerobicprocessofwastewatertreatment:
Aerobic treatment of wastewater is a biological
process that uses oxygen to break down organic
contaminants and other pollutants like nitrogen
and phosphorous. Oxygen is continuously mixed
into the wastewater or sewage by a mechanical
aeration device, such as an air blower or
compressor. Aerobic microorganisms then feed
on the wastewater’s organic matter, converting it
into carbon dioxide and biomass which can be
removed.
Fig: Aerobic Process
Reff :Haghighat, F., Lindholm-Lehto, P., Khodaparast, Z., Kamali,
M., and Elliott, A. (2016). "Wastewater treatment and
reclamation: A review of pulp and paper industry practices
and opportunities," BioRes. 11(3)

10. Membrane-bioreactor processforwastewatertreatment:
Reff: Rev. Ambient. Água vol.15 no.2 Taubaté 2020
APHA; AWWA; WEF.
Membrane bioreactor (MBR) is the
combination of a membrane process like
microfiltration or ultrafiltration with a
biological wastewater treatment process,
the activated sludge process. It is now
widely used for municipal and
industrial wastewater treatment.

11. Electrolysisprocess ofwastewatertreatment:
Electrodialysis water treatment is used with Water
Quality on very hard water, with a hardness of more than
500 mg/L.
Positively charged ions move to the
negative electrode during electrolysis. They receive
electrons and are reduced.
Negatively charged ions move to the positive
electrode during electrolysis. They lose electrons and
are oxidised. The substance that is broken down is
called the electrolyte. By this process water hardness
are removed.
Reff:Alexandre Andrade Cerqueira and Monica Regina da Costa Marques
(2002),p-117,vol 1

13. Thanks All Of You