NEET · Biology · Sewage Treatment — Gap Fill

Exercise and reference answers

Missing parts

1. Answer

   sedimentation

   Choices

   1. sedimentation
   2. boiling
   3. chlorination
   4. ozone

2. Answer

   organic matter

   Choices

   1. plastics
   2. metals
   3. organic matter
   4. minerals

Complete the statement

Primary treatment of sewage removes large solids by {0}, while secondary treatment uses microorganisms to break down dissolved {1}.

Instructions

Fill the steps of municipal sewage treatment.