Download AKTU B-Tech 6th Sem 2014-2015 Environmental Engineering 2 Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 6th Semester (Sixth Semester) 2014-2015 Environmental Engineering 2 Question Paper

Printed Pages : 3
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(Following Paper II? and Roll No. to be ?lled in your Answer Book) .
PAPER ID : 100602
Roll No.
B. Tech.
(SEM. VI) THEORY EXAMINATION, 2014-15
?ENVIRONIVIENTAL ? ENGINEERING - 2
Time : 3 Hours] ' [Total Marks : 100
Note: Attempt. all Questions. Assume any missing data suitably.-
1 Attempt any four parts of the following : (5X4=20)
(a)
(b)
(c)
(d)
(e)
(t)
100602]
Discuss advantages & disadvantages of BOD & COD
tests. '
How are the organic content measured in wastewater?
sample? Discuss any one method in detail,
Why are some diseases called "Waterborne"? Explain
any one disease in detail.
The BOD of sewage incubated for 5 days at 30?C is
130mg/1.Calcu_late the BOD at 20?C.Assume K20=0.1
Give the maximum acceptable limits of TDS, turbidity,
colour, hardness & pH in- drinking water.
Deduce an expression for BOD with curve.
1 [ Contd...

Attempt any two parts of the?following :.
(a)
(b)
(C)
Attempt any two parts of the following 2
(a)
(b)
(e)
4 Attempt any two parts of the following :
(a)
100602]
(10x2-?'20)
Derive Stokes law for the settling velocity of a discrete
particleindilutesmnple wspensio'n Diswssthelimimtions
Di??erentiate between coagulation & ?occulation used in
water treatment plant. '
?At a water-treatment plant, 12 million litres of water
is treated daily,using alum dosage of 16 mg per litre.
Find total quantity of alum used daily.
(10x2=20)
, Design a rapid sand ?lter to treat 10 million litres of
' raw water?per day allowing 0.5% of ?ltered water for
backwashingHalf hour per .day is used for
backwashing.Assume necessary data.
Differentiate between slow sand! & rapid sand ?lters.
In a water treatment plant, raw water is passed through
a ?lter bed of uniform sand at a velocity of 5m/hour. The
?lter is made of sand grains of diameter =O.4mm, shape
factor=0.85 & speci?c gravity =2.65, the depth of the
bed is 0.67m & porosity is 0.4. Determine the head loss
through the bed. (Take density of water = 968kg/m3
& dynamic viscosity =1.0 X 107? kg/m)
' (1 0x 2=?20)
Di??erm?date between activated sludge process & trickling
?lter process.
2 [ Contd...
(b)
(c)
(a)
(b)
(C)
(d)
(e)
(0
100602]
Attempt any four parts of the following :
Determine the size of high rate trickling ?lter for the
followmg' data:
Flow = 4 Mld, Recirculation ratio =1.4,BOD of raw
sewage=250mg/1,BOD removed in primary
clari?er=25%,Final ef?uent BOD desired = 50mg/l.
Design a facultative aerated lagoon to serve 50,000
people.For sewage ?ow @ 180 1pcd=7200cu.m/
day.Raw BOD5 = 275mg/1 & ?nal BOD5 is not exceed
30mg/1 in winter.Ambient air temperature in January is
20?C and in summer 37?C.
(5x4=20)
What is septic tank. Diswss advantages & disadvantages
of centralised & decentralised wastewater treatment.
What is sludge thickening ? Give detail of gravity
thickening
What is UASBR? Discuss its features.
Di??eremiate between anaerobic ?xed bed reactor,?uidized
bed reactor,expanded bed reactor.
What is anaerobic digestion? Explain in detail.
Design a septic tank for 300 users.Water allowance is
1201'1tres per head per day. Detention period may be
taken as 8 hoursDraw a neat sketch of a septic tank.
3 [ 11675 1