Question

fill in the blanks .
a. _______ is added to the sewage to neutralise it.
b. the set of pipes which take away sewage from our homes to the water treatment plants are called___________.
c. ____________ trees are planted all along the sewage ponds.
d. sewage is treated with certain _________ which decomposes organic matter.
e. the human waste and unclean water carried from buildings is called ________.
f. wastewater together with stormwater runoff discharged into the drains is called ____.
g. the wastewater is carried out of houses by pipes called _____.
h. a network of sewers which is laid to collect sewage is called _____.
I. impurities present in the wastewater are called _____.
j. solid matter produced by sewage treatment is called ______.
k. we should throw used oil in the ___________.
l. discharge of liquid waste from a manufacturing plant ________.

Answer 1

a and d answer is micro-organisms