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Question
A trickling filter is used in which of the following wastewater treatment processes
A trickling filter is used in which of the following wastewater treatment processes
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Solution
The correct option is B Secondary aerobic treatment
The correct option is option B.
Explanation of the correct option:
- Wastewater treatment is the process of removing impurities from wastewater and converting it into an effluent that may be recycled into the water cycle.
- Wastewater treatment is the process of restoring water that has been utilised and/or polluted by people or nature to an acceptable state.
- Trickling filters are used in secondary wastewater treatment to aerobically remove pollutants by microorganisms.
- It employs an attached growth method in which a bed of rocks, gravel, coke, slag, peat moss, and plastic is created through which garbage is flown and microorganisms are attached to the bed's surface.
- Natural air flowing through the bed or forced air diffusion makes the entire system aerobic.
- The wastewater trickles through the porous bed and organic material is gathered on it, thus the term trickling filter.
Explanation of the incorrect options:
Option A:
- Primary waste treatment is physically removing big and tiny particles by filtering and sedimentation.
- Floating debris is removed first by sequential filtering, followed by sedimentation to remove grit (soil and tiny stones).
Option C:
- In the absence of oxygen, bacteria break down organic pollutants in anaerobic wastewater treatment.
- Water enters a bioreactor receptacle in a typical anaerobic treatment cycle.
Option D:
- Tertiary treatment in wastewater is the third and last advanced treatment procedure used in a wastewater plant to disinfect water that has already been treated by primary and secondary processes for eliminating dangerous material.
- This results in high-quality, potable water.
Final Answer: A trickling filter is used in secondary wastewater treatment processes.
Secondary aerobic treatment
The correct option is option B.
Explanation of the correct option:
- Wastewater treatment is the process of removing impurities from wastewater and converting it into an effluent that may be recycled into the water cycle.
- Wastewater treatment is the process of restoring water that has been utilised and/or polluted by people or nature to an acceptable state.
- Trickling filters are used in secondary wastewater treatment to aerobically remove pollutants by microorganisms.
- It employs an attached growth method in which a bed of rocks, gravel, coke, slag, peat moss, and plastic is created through which garbage is flown and microorganisms are attached to the bed's surface.
- Natural air flowing through the bed or forced air diffusion makes the entire system aerobic.
- The wastewater trickles through the porous bed and organic material is gathered on it, thus the term trickling filter.
Explanation of the incorrect options:
Option A:
- Primary waste treatment is physically removing big and tiny particles by filtering and sedimentation.
- Floating debris is removed first by sequential filtering, followed by sedimentation to remove grit (soil and tiny stones).
Option C:
- In the absence of oxygen, bacteria break down organic pollutants in anaerobic wastewater treatment.
- Water enters a bioreactor receptacle in a typical anaerobic treatment cycle.
Option D:
- Tertiary treatment in wastewater is the third and last advanced treatment procedure used in a wastewater plant to disinfect water that has already been treated by primary and secondary processes for eliminating dangerous material.
- This results in high-quality, potable water.
Final Answer: A trickling filter is used in secondary wastewater treatment processes.
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