The most common method of wastewater disposal is
- AEvaporation
- BDilution in surface waterCorrect
- CRapid infiltration
- DApplication in irrigation
Solution
Concept
Common methods of wastewater disposal
Formula
NONE
Step-by-step solution
1. Disposal of treated wastewater requires an efficient and economical receiving body. 2. Discharging wastewater into natural surface waters allows natural self-purification processes to occur. 3. Therefore, dilution in surface water is the most common method of wastewater disposal. Answer: B
Explanation
Discharging wastewater into large surface water bodies like rivers, lakes, or seas is the most widely practiced disposal method due to its simplicity and cost-effectiveness. Natural self-purification processes in the receiving water body further break down remaining organic pollutants over time.
Why the other options are wrong
A) Evaporation is suitable only for small waste volumes in arid regions. C) Rapid infiltration requires specific permeable soil conditions and is less commonly used. D) Application in irrigation requires large land areas and suitable cropping patterns.
Shortcut
Most common wastewater disposal method is Dilution in surface water.
Common mistake
Confusing disposal by dilution in natural water bodies with land application or irrigation methods.
Correct answer: B) Dilution in surface water