CROSSWORD
W
S
S
W
G
T
S
L
D
W
G
B
R
C
S
N
T
T
N
Z
R
N
X
C
R
T
Clues to the crossword puzzle.
Across
3. Liquid waste products: SEWAGE
4. Solid waste extracted in sewage treatment: SLUDGE
6. A word related to hygiene: SANITATION
8. Waste matter discharged from human body: EXCRETA
Down
1. Used water: WASTE
2. A pipe carrying sewage: SEWER
5. Micro-organisms which causes cholera: BACTERIA
7. A chemical to disinfect water: OZONE
V
R
?
U
S
C
H
A
B
L
?
T
?
R
G
I
?
G
?
K
I
T
N
A
B
C
L
?
W
A
A
N
?
F
R
U
I
T
S
Y
N
?
CLUES :
1. ALL ? ARE REPLACED BY ONLY ONE LETTER…….find out
which that letter is.(HINT : It is a vowel.)
*ANS-[e]
2. The word which starts from F is what we eat .
*ANS-[food]
3. The word which starts from WA is what we do before and
after taking a meal.
*ANS-[wash]
1
3
2
4
5
6
ACROSS :
3. Naturally occurring, grows in aeration tanks and can eat some
dissolved pollutants and some of them can cause disease.
4. A viscous mixture of liquid and solid components
(generates from waste).
5. A construction material which is used for purification of water.
(The waste water solids are mixed with which raises the pH of the
material to provide stabilization.)
6. Water measuring unit for large amount.
DOWN :
3. Dried and disinfected sludge that is safe to
spread on farm fields. (synonym: manure)
2. The liquid portion of the wastewater stream
that is oxidized and nitrified in a tank.
(Process of air circulation in water)
1. Keep safe from harm or injury.
(similar word of save)
ANSWER:
P
B A C T E R I
I
O
O
T
S L U D G E
O
C
L I M E
T
I
D
G A L L O
S
A
E
R
A
T
I
O
N S