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Liquid Waste Management Question Paper

Liquid Waste Management

Course:Bachelor Of Science In Environmental Health

Institution: Kenyatta University question papers

Exam Year:2009

KENYATTA UNIVERSITY
FIRST SEMESTER EXAMINATIONS 2009/2010
UNIVERSITY EXAMINATIONS FOR DEGREE OF BACHELOR OF SCIENCE
(ENVIRONMENTAL HEALTH)

HEH 309: LIQUID WASTE MANAGEMENT

DATE:
Monday 28th December 2009
TIME: 11.00am - 1.00pm

INSTRUCTIONS

SECTION 1 ANSWER ALL QUESTIONS – 20 MARKS

1.
Define each of the following terms
a)
Psychrophils
b)
Black
water
c)
Mesophils
d)
Foul
sewage
e)
Thermophils
f)
Grew
water
g)
Sewerage
h)
Unit
operations
i)
Unit
processes
j)
BOD5
k)
BODult
l)
Surface
loading [1mark
each
=

12marks}

Briefly explain the conditions necessary for microbial activity on wastewater

treatment.

[8marks]
Page 1 of 2
SECTION 2 PART 1: COMPULSORY- 20 MARKS
2.
Describe how you can determine the following in the laboratory.
a)
BOD5

[10marks]

b)
COD

[10marks]

SECTION 2 PART I1: ANSWER ANY TWO QUESTIONS- 30 MARKS
3.
a)
Explain the principles of operation of activates sledge.
[7mark]

b)
Outline the routine maintenance requirement in a waste sterilization pond.

[4marks]

c)
Describe the health and safety issues associated with waste stabilization
ponds.
[4marks]

4.
a)
Describe the principles and applicability of biological filters. Use
illustrations
where
applicable. [8marks]
b)
Describe
the
advantages and disadvantages of biological filters.

[7marks]

5.
Write short notes on each of the following as applied to waste stabilization ponds
a)
Anaerobic
pond

[5marks]
b)
Facultative
ponds
[5marks]
c)
Maturation
ponds

[5marks]

6.
a)
Explain the design criteria for Trickling filters.
[5marks]

b)
Describe the criteria for selecting waster water treatment methods.

[10marks]

Page 2 of 2

Liquid Waste Management Question Paper

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