Exams › NEET › Biology

Secondary sewage treatment is mainly a:

1. physical process
2. mechanical process
3. chemical process
4. biological process

Correct answer: biological process

Solution

Secondary sewage treatment uses microorganisms to decompose dissolved and suspended organic matter after primary treatment. Because the cleanup is done by biological activity, it is classified as a biological process.

Related NEET Biology questions

• Which of the following is put into Anaerobic sludge digester for further sewage treatment?
• Match the following organisms with the products they produce: (a) Lactobacillus, (b) Saccharomyces cerevisiae, (c) Aspergillus niger, (d) Acetobacter aceti; Products: (i) Cheese, (ii) Curd, (iii) Citric acid, (iv) Bread, (v) Acetic acid. Select the correct option.
• Which of the following in sewage treatment removes suspended solids?
• Which of the following is a commercial blood cholesterol lowering agent?
• What gases are produced in anaerobic sludge digesters?
• The guts of cow and buffalo possess:

⚔️ Practice NEET Biology free + battle 1v1 →