Question:
What is the key difference between primary and secondary sewage treatment?
What is the key difference between primary and secondary sewage treatment?
Updated On: Jan 7, 2025
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Solution and Explanation
| Primary Sewage treatment | Secondary sewage treatment | |
| It is a mechanical process involving the removal of coarse solid materials. | 1 | It is a biological process involving the action of microbes. |
| It is inexpensive and relatively less complicated. | 2 | It is a very expensive and complicated process. |
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Concepts Used:
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There are several valuable microorganisms that are beneficial to humans in various manners such as:
In Household Products
- Fermentation of milk to produce yogurt.
- Milk cuddling to compose curd, cheese, and paneer.
In Industrial Products
- Production of beverages such as wine, beer, whiskey, brandy, or rum.
- Production of antibiotics such as Penicillin and other chemical substances to kill or retard the expansion of disease-causing microbes.
Fermented Beverages
- A fermentor is used to produce microbes on a large scale for industrial purposes.
- The brewer’s yeast (Saccharomyces cerevisiae) is used to make ethanol. At this time, the yeast ferments malted cereals and fruit juices.
Antibiotics
- The term antibiotic means “against life”. These materials can kill or destroy the growth of other microbes.