Question

Visit a sewage treatment plant.

It could be as exciting and enriching as a visit to a zoo, a museum, or a park. To guide your observation here are a few suggestions.

Record in your notepad:

Place ______ Date ______ Time ______

Name of the official at the plant ______ Guide/Teacher ______

1. The location of the sewage plant.
2. Treatment capacity.
3. The purpose of screening as the initial process.
4. How is air bubbled through the aeration tank?
5. How safe is the water at the end of the treatment? How is it tested?
6. Where is the water discharged after treatment?
7. What happens to the plant during heavy rains?
8. Is biogas consumed within the plant or sold to other consumers?
9. What happens to the treated sludge?
10. Is there any special effort to protect nearby houses from the plant?
11. Other observations.

Answer 1

Sewage Treatment Plant Visit Report

Place: Delhi Sewage Treatment Plant, Okhla

Date: 15th July 2024

Time: 10:00 AM

Name of the official at the plant: Mr Rajesh Kumar

Guide/Teacher: Mrs. Anita Sharma

1. The location of the Sewage plant is Okhla, New Delhi, near the Yamuna River.
2. Treatment Capacity: The plant has a treatment capacity of 40 million gallons per day (MGD).
3. Purpose of Screening as the Initial Process: Screening removes large debris and solid waste to prevent damage to equipment and ensure smooth processing.
4. Aeration Tank Process: Air is bubbled through the aeration tank using diffusers to promote the growth of aerobic bacteria that decompose organic matter.
5. Safety and Testing of Water: The treated water is tested for pH, dissolved oxygen, and microbial content to ensure it meets safety standards.
6. Water Discharge Post-Treatment: The treated water is discharged into the Yamuna River, following environmental guidelines.
7. Impact During Heavy Rains: During heavy rains, the plant manages increased inflow through overflow control measures to prevent flooding.
8. Biogas Usage: Biogas produced is used within the plant for energy needs, with any excess sold to local consumers.
9. Treated Sludge Management: Treated sludge is dewatered and used as fertilizer or disposed of in landfills.
10. Protection of Nearby Houses: Efforts include odour control systems, landscaping, and regular monitoring to minimize the impact on nearby residential areas.
11. Other Observations: The plant employs advanced technology to ensure efficient treatment and has a visitor centre for educational purposes.