Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
126 views
in General by (108k points)
closed by

Consider the following tertiary treatment methods for treatment of waste water:

1. Ion-exchange method

2. Reverse osmosis

3. Chemical oxidation method

4. Activated sludge process

Which of the above methods are correct ?


1. 1, 2 and 4
2. 1, 3 and 4
3. 2, 3 and 4
4. 1, 2 and 3

1 Answer

0 votes
by (101k points)
selected by
 
Best answer
Correct Answer - Option 4 : 1, 2 and 3

There are three distinct steps involved in traditional wastewater treatment methods.

Primary wastewater treatment:

  • Primary treatment of wastewater involves sedimentation of solid waste within the water. This is done after filtering out larger contaminants within the water.
  • Wastewater is passed through several tanks and filters that separate water from contaminants.
  • The resulting sludge is then fed into a digester, in which further processing takes place.
  • This primary batch of sludge contains nearly 50% of suspended solids within wastewater.

 

Secondary wastewater treatment:

Secondary treatment of wastewater makes use of oxidation to further purify wastewater. This can be done in one of three ways:

  • Biofiltration
  • Aeration
  • Oxidation ponds

 

Tertiary wastewater treatment:

  • It is mostly comprised of removing phosphates and nitrates from the water supply.
  • Substances like activates carbon and sand are among the most commonly used materials that assist in this process.
  • Several methods have been applied for final treatment, such as adsorption using activated carbon or other appropriate sorbents, post precipitation, ion-exchange, reverse osmosis, electrochemical treatment, and evaporation.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...