Thesis presentation, August 2019
Slide#14
Microsoft Powerpoint Presentation
Design:Pushpin
Title
The
Removal of COD and BOD from wastewater of The Civil Engineers
Ltd.,
Unit-2:
A case
study.
Submitted
by
Md. Shaheruzzaman
WMES student
ID:
180410
Admission Semester: September 2018
Department
of Environmental Sciences
Jahangirnagar
University
Introduction
The
important source of wastewater is the washing plant. Huge amount of water is
used by washing processes and produced wastewater. Wastewater is detrimental
for natural environment if it goes to water body without treatment. Effluent
treatment plant is used to treat the wastewater. Biological
treatment process is a way to treat the wastewater by activated sludge. The
treated water parameters must meet the standard ECR1997.
Rationality
of wastewater treatment properly
Washing
industry in Bangladesh is very vital part for export garments product. This
industrial activity needs large amount of water and also produce huge amount of
wastewater. This wastewater pollutes
the water, if the
toxic effluent is discharged into open water body such
as river without
any treatment.
The
change of normal water parameters of natural water body will be destroying the
ecological system
i.e., the total environment.
For this reason the textile effluent need to be treated as properly and timely.
Proper treatment of wastewater is save our natural environment.
Objectives
The
objectives of the present work:
o
To determine the water parameters like pH, TDS, COD and BOD of existing ETP
inlet and outlet.
To reduce and control COD and BOD parameters
and to meet the standard ECR1997
Study
area
The
effluent sample was collected form The Civil Engineers Ltd., Unit-2 ETP inlet
and outlet. Existing
ETP
outlet/treated
water
does not meet the standard ECR 1997. Activated sludge
treatment process is applied on the existing ETP outlet water.
Method
Activated
sludge is a
great source
of active microbes.
These microbes degrade the effluents. It
is biological process used for
textile wastewater treatment. It
is eco friendly and cost effective.
The
existing ETP outlet water has treated by activated sludge i.e., biological
wastewater treatment process.
Results
pH test result of existing ETP
pH test result of existing ETP
SN
|
ETP Inlet water
|
ETP Outlet water
|
Test
1
|
8.3
|
7.3
|
Test
2
|
8.2
|
7.1
|
Test
3
|
7.9
|
7.5
|
Test
4
|
8.1
|
7.6
|
Test
5
|
8.6
|
7.7
|
Test
6
|
8.3
|
7.8
|
Test
7
|
8.2
|
7.4
|
Test
8
|
8.9
|
7.1
|
Test
9
|
8.7
|
7.4
|
Test
10
|
8.1
|
7.5
|
Average
result
|
8.3
|
7.4
|
Results
TDS test result of existing ETP
TDS test result of existing ETP
et Water
|
ETP outlet water
|
|||||||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||||||
| Results COD test result of existing ETP |
||||||||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||||||
| Results BOD test result of existing ETP |
||||||||||||||||||||||||||||||||||||||
|
Results
COD test result after treatment by activated sludge
COD test result after treatment by activated sludge
SN
|
Before treatment
|
After treatment
|
Test 1
|
245
|
125
|
Test 2
|
236
|
153
|
Test 3
|
212
|
168
|
Test 4
|
186
|
142
|
Test 5
|
205
|
130
|
Test 6
|
273
|
152
|
Test 7
|
228
|
173
|
Test 8
|
234
|
128
|
Test 9
|
176
|
132
|
Test 10
|
235
|
127
|
Average
result
|
223 mg/L
|
143 mg/L
|
Results
BOD test result after treatment by activated sludge
BOD test result after treatment by activated sludge
SN
|
Before treatment
|
After treatment
|
Test 1
|
58
|
23
|
Test 2
|
67
|
29
|
Test 3
|
65
|
36
|
Test 4
|
57
|
25
|
Test 5
|
63
|
21
|
Test 6
|
58
|
19
|
Test 7
|
75
|
35
|
Test 8
|
66
|
23
|
Test 9
|
56
|
27
|
Test 10
|
45
|
22
|
Average
result
|
61 mg/L
|
26 mg/L
|
Conclusion
The present
work
was
carried out to analyze
the pH, TDS, COD and BOD parameters of existing
ETP
inlet and outlet. Average pH, TDS, COD and BOD of existing ETP outlet was 7.4,
867 mg/L, 223 mg/L and 61 mg/L respectively.
Here
applied the activated sludge
i.e., biological treatment process to
treat existing ETP outlet
water. After treatment COD and
BOD parameters
are found 143 mg/L and 26 mg/L respectively. It is shown that COD and BOD
parameters meet with
the standard ECR1997.
Thank
you
