Biological Filters and Sewage Treatment
This blog post discusses the use of biological filters in sewage treatment. It covers topics such as percolation rate, soil absorption systems, methods of applying sewage effluents to farms, oxygen sag curves, sewage sickness, and preventive methods for sewage sickness.
Questions and Answers
Here are some questions and answers about biological filters and sewage treatment:
- Question: What is percolation rate?
- Answer: Percolation rate is defined as the time in minutes required for sewage or water to pass through the ground by one centimeter.
- Question: What are the soil absorption systems?
- Answer: The soil absorption systems are dispersion trench and seepage pit (or) soak pit.
- Question: What are the methods of applying sewage effluents to farms?
- Answer: The methods of applying sewage effluents to farms are surface irrigation, free flooding, border flooding, and check flooding.
- Question: What is meant by oxygen sag curve?
- Answer: The oxygen sag curve is a graph that shows the change in dissolved oxygen concentration in a stream or river as sewage effluent is discharged into it.
- Question: What is meant by sewage sickness?
- Answer: Sewage sickness is a condition that occurs when the soil becomes clogged with sewage and can no longer absorb it.
- Question: What are the preventive methods for sewage sickness?
- Answer: The preventive methods for sewage sickness are primary treatment of sewage, choice of land, under drainage of soil, giving rest to land, and rotation of crops.
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