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8/10/2019 BAA3613 Enviroment Engineering Final Exam
1/8
wffiffiE
I]MVERSITI
MALAYSIA
PAHANG
FACULTY OF
CIVI ENGINEERING
&
EARTH
RESOIIRCES
INSTRUCTIONS
TO CANDIDATES
1.
Answer
ALL
questions.
2. All
answer to
a
new
question
should start on
a
new
page.
3.
All the calculation
and assumptions must
be
clearly shown
and stated.
4.
Answer ALL
questions
in TWO
(2)
decimal
points.
EXAMINATION
REOUIREMENTS
1. Periodic
Table
FINAL
EXAMINATION
COURSE
COT]RSE
CODE
LECTI]RER
DATE
DURATION
SESSION/SEMESTER
PROGRAM CODE
EI{WRONMENTAL
ENGINEERING
B4A3613
DR
NGIEN SU KONG
NADIAH BT
MOKIITAR
5
JANUARY
2015
3
HOURS
SESSION 2OI4I2OI5
SEMESTER
I
BAA
DO
NOT TURN THIS PAGE
TINTIL
YOU ARE
TOLD
TO DO
SO
This examination
paper
consists
of
MNE
(9) printed pages
including front
page
8/10/2019 BAA3613 Enviroment Engineering Final Exam
2/8
CONFIDENTIAL
QIIESTION
1
BAA/1415V8AA3613
Water
samples were taken from the distribution
point
of
a water treatment
plant
in
Skudai, Johor and tested
to
determine the
quality
of
the treated water.
The
testing
proceeded
until
only
three
parameters
were
left
to
be
determined.
All
the
other
parameters
tested were
within
the acceptable limit stated in
the National
Standard for
Drinking Water
Quality
expected for
MPN,
TDS and Hardness. The maximum
acceptable value for the
three
parameters
still
to be determined
is shown in Table
Qla.
Table
Qla
:Parameter
Limit in National Standard
for Drinking
Water
Quality
Parameters Maximum
Acceptable Value
Total Coliform
Absent
in
100
mL
sample
Total Dissolved Solids 1000 mg/L
Total
Hardness 500
mg/L
The results for the solids determination are
as
follows:
150 mL of the water
sample
was filtered. The
weight of the filter
paper
before
filtering is
0.05
g.
After filtering and drying at 1030C,
the weight of the
filter
paper
is
0.0749. The
water
that
passed
through
the filter was
put
in a drying dish
and dried
at
1030C. The weight
of the drying dish alone
is
110
g.
The weight
of
the dish together
with
the residue
after drying is 110.336
g.
Calculate the
Total
Dissolved Solids in the water.
(4
Marks)
8/10/2019 BAA3613 Enviroment Engineering Final Exam
3/8
CONFIDENTIAL
QUESTTON
2
If daily water
demand at the end
of
2040
is
heavy industry
(22,000
Llha.day)
and light
service factor,
F
0.5,
determine:
)/.Vopulation
groMh
rate,
r
K
Population
in
year
zo4o
BAA/1415I/BAA3613
estimated to
be 300l/person.day,
industry
(45,000
Lha.day),
with..,r
Water
distribution
depending on
the topography
of the distribution
areas.
With
suitable
illustration,
sketch and describe
'gravity
and
pumped
combinations'
system in water distribution work.
(3
Marks)
b) Bentong is estimated to become
a new
satellite city in
2040.
A budget has been
allocated for heavy industrial area
(40
ha)
and
light
industrial
area (80
ha)
development.
Existing data
taken from
Jabatan Perangkaan shows the
following
population
data in Table
Q2a:
Table
Q2a:
Population
data
for
Bentong town
Year
Population
(person)
1
980
35, 000
20t0
60,
300
qF
+
iii. Total
average daily water
demand for 2040 (I\4LD)
\
c)
The overflow
rate
for
sptlilrg
cglumn is
given
as 500l/m2.hr.
velocity is 1.5mm/s,
will the floc
settle?
Veriff
the answer.
4***,
If the
floc
settling
(5
Marks)
d)
Differentiate
the
function of residual
chlorine
and
chlorine demand
in
chlorination
process.
Define
breakpoint chlorination
(5
Marks)
8/10/2019 BAA3613 Enviroment Engineering Final Exam
4/8
CONFIDENTIAL
,6
The
results for the ionic content of the
water are
as
follows:
Ca2*
:70
mglL
OH-
:
50
mgll-
Mg'*
=
45 mglL
Coz2-:120 mglL
Na*
:
8
mgll
SO
a2-
:29.28 mglL
Compute
the Total Hardness
in the water.
(12
Marks)
The results
for the multiple tube
fermentation tests
are as shown
in Table
Qlb.
Estimate
the
MPN/100 mL.
Table
Qlb
: Total Coliform Analysis
Size of
Portion
(mL)
10
I 0.1 0.01
0.001
Positive
Tubes
2
I
0
4
0
Negative Tubes
a
J
4
5
I 5
(5
Marks)
Based
on Table
Qla
and
the results in
part
(a)
to
(c),
judge
whether the water
from the water treatment
plant
is
fit for drinking.
(4
Marks)
BAA/141sy8AA3613
8/10/2019 BAA3613 Enviroment Engineering Final Exam
5/8
CONFIDENTIAL
BAA/1415I/8AA3613
e) In types
2
sedimentation,
the flocculating
particles
are continuously changing
in
size,
and
shape.
Therefore, a settling
column is used to determine
the removal
efficiency of
the column and
the
sedimentation
column
analysis
result obtained
is shown
in Table
Q2b
below.
From the
data:
i. Plot isoremoval lines
ii. Construct vertical
line
at
detention
time, t--40min
iii.
Determine
the
removal efficiency
(7
Marks)
Table
Q2b:
Analysis
of sedimentation
column
for
180
minutes
Depth
(m)
Time of
sampling,
min
10
20 40
60
90 t20
Percentage
removal
(%oR)
0.6
50
60
67
72
73 76
t.2
33
45
s8 62
70 74
1.8 31
38 54
59
63 7l
8/10/2019 BAA3613 Enviroment Engineering Final Exam
6/8
CONFIDENTIAL
QUESTTON
3
BAA/1415I/8AA3613
,{
Discuss THREE
(3)
methods that
can
be
used in sludge disposal.
,
'
\-e\A$
\jN'^
Design
a
waste stabilization
pond
system that
treats 20 MLD of wastewater
at a
temperature
@
The system should
contain all three types of
ponds.
other
information for the design
is
given
in Table
Q3.
(6
Marks)
(19
Marks)
Table
Q3:
Information for Waste Stabilization
Pond
17500000
FC/100
mL
Depth
of FacultativePond
,/
Maturation Pond Retention
Time,
t-