Noida's Sewage Treatment Plants: Only One-Third of Water Reused
NGT criticizes Noida Authority for underutilizing treated sewage water despite treatment capacity.
Photo by Alena Yzhanina
Key Facts
Treated sewage water reused: 86 MLD
Wastewater discharged into drains: 174 MLD
Total sewage treated: 260 MLD
Total STPs in Noida: 8
UPSC Exam Angles
GS Paper 3: Environment and Ecology, Infrastructure
Links to Sustainable Development Goals (SDGs), particularly SDG 6 (Clean Water and Sanitation)
Potential for questions on water management policies, environmental regulations, and technological advancements in wastewater treatment
Visual Insights
More Information
Background
The concept of sewage treatment and water reuse has evolved significantly over time. Historically, civilizations like the Romans and Egyptians recognized the importance of sanitation and developed basic sewage systems. However, modern sewage treatment plants (STPs) emerged in the late 19th and early 20th centuries in response to growing urbanization and water pollution.
Early STPs primarily focused on removing solids and reducing biochemical oxygen demand (BOD). Over time, advancements in technology led to more sophisticated treatment processes, including secondary and tertiary treatment, enabling the removal of nutrients and pathogens. The focus has shifted from simply disposing of wastewater to recovering valuable resources, such as treated water for irrigation, industrial use, and even potable water augmentation.
Regulations like the Clean Water Act in the US and similar initiatives globally have driven the adoption of STPs and promoted water reuse.
Latest Developments
Recent trends in sewage treatment and water reuse include the increasing adoption of advanced treatment technologies like membrane bioreactors (MBRs) and reverse osmosis (RO) to achieve higher water quality. There's also a growing emphasis on decentralized wastewater treatment systems, particularly in urban areas, to reduce the cost and energy associated with transporting sewage to centralized STPs. Furthermore, the integration of digital technologies, such as sensors and data analytics, is enabling more efficient and optimized operation of STPs.
Looking ahead, the focus is expected to intensify on resource recovery from wastewater, including the extraction of nutrients like phosphorus and nitrogen for fertilizer production, and the generation of biogas for energy production. The circular economy approach is gaining traction, viewing wastewater as a valuable resource rather than a waste product. The Jal Jeevan Mission and AMRUT scheme are also pushing for better water management and reuse.
Practice Questions (MCQs)
1. Consider the following statements regarding Sewage Treatment Plants (STPs): 1. Primary treatment in STPs primarily focuses on removing dissolved organic matter. 2. Membrane Bioreactors (MBRs) are an example of advanced tertiary treatment technology. 3. The treated water from STPs is exclusively used for non-potable purposes like irrigation and industrial cooling. Which of the statements given above is/are correct?
- A.1 only
- B.2 only
- C.1 and 3 only
- D.2 and 3 only
Show Answer
Answer: B
Statement 1 is incorrect because primary treatment focuses on removing solids. Statement 3 is incorrect because treated water can be used for potable purposes after advanced treatment.
2. In the context of wastewater treatment, what is the primary purpose of 'tertiary treatment'?
- A.Removal of large solids and grit
- B.Reduction of Biochemical Oxygen Demand (BOD)
- C.Removal of specific pollutants like nitrogen and phosphorus
- D.Disinfection to kill pathogens
Show Answer
Answer: C
Tertiary treatment aims to remove specific pollutants that remain after secondary treatment, such as nitrogen, phosphorus, and heavy metals.
3. Which of the following statements is NOT correct regarding the National Green Tribunal (NGT)?
- A.The NGT was established in 2010 under the National Green Tribunal Act.
- B.The NGT is mandated to dispose of cases within 6 months.
- C.The NGT's jurisdiction covers all environmental laws listed in Schedule I of the NGT Act.
- D.The NGT can only hear cases related to air and water pollution.
Show Answer
Answer: D
The NGT has a broader jurisdiction covering various environmental issues beyond just air and water pollution, including forest conservation, biodiversity protection, and environmental impact assessment.
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Source Articles
Only one-third of treated sewage water used in Noida, rest goes in drains, NGT told | Delhi News - The Indian Express
After residents fall sick due to ‘contaminated water’, Greater Noida Authority orders audit of pipelines, reservoirs
City News, Indian City Headlines, Latest City News, Metro City News | The Indian Express
Ground Report: In Noida, rain brings power cuts and clogged drains, RWAs ring alarm bells | Delhi News - The Indian Express
Noida Authority CEO inspects developmental, sanitation projects | Delhi News - The Indian Express