Eichhornia in Ambazari Lake: Wadi STP to be Operational in Six Months
Ambazari Lake, a serene water body in Nagpur, has been struggling with an invasive problem—Eichhornia, or water hyacinth. Over the last one-and-a-half years, the rapid spread of this weed has significantly disrupted aquatic life in the lake. The primary culprit? Sewage intrusion, which has enriched the lake with nutrients, creating the perfect environment for Eichhornia to thrive.
In a proactive move, the Wadi Municipal Council (WMC) is constructing an 11 MLD Sewage Treatment Plant (STP) to address this issue. The project, slated for completion in six months, is a step toward reclaiming the lake’s health.
Understanding the Eichhornia Issue
What is Eichhornia?
Eichhornia, commonly known as water hyacinth, is an invasive aquatic plant that grows rapidly in nutrient-rich water. While it can be aesthetically pleasing, it poses severe ecological threats, such as:
- Depleting oxygen levels in water.
- Hindering sunlight penetration.
- Disrupting aquatic ecosystems.
How Eichhornia is Spreading in Ambazari Lake
The unchecked release of untreated sewage into Ambazari Lake has led to an excess of nutrients, particularly nitrogen and phosphorus, fueling the growth of Eichhornia. The problem has persisted despite efforts by the Nagpur Municipal Corporation (NMC) to clean the lake during the past two monsoon seasons.
Role of the Wadi STP Project
Why Was the STP Proposed?
NMC’s inspection of areas surrounding the lake revealed a nullah near Amravati Road releasing untreated sewage into the lake. This finding prompted NMC to urge WMC to construct an STP.
Project Overview
The STP, funded with ₹105 crore under the Maharashtra Suvarna Jayanti Nagarotthan Abhiyan, will:
- Treat 11 million liters of sewage daily.
- Release treated water back into the lake.
- Generate fertilizer from sewage sludge.
Progress and Timeline
As of now:
- Construction near Ambedkar Nagar is ongoing.
- Over 25 km of a planned 72-km sewer network has been completed.
- The project is expected to be operational within six months.
Environmental and Economic Benefits
1. Reducing Pollution in Ambazari Lake
The STP will drastically cut down the direct release of untreated sewage, reducing nutrient inflow and inhibiting Eichhornia growth.
2. Supporting Aquatic Life
By curbing the spread of Eichhornia, the project aims to restore oxygen levels and sunlight penetration, enabling aquatic flora and fauna to thrive.
3. Revenue Generation
The project includes plans to:
- Sell treated water to Hingna MIDC.
- Manufacture fertilizer from sludge, creating a sustainable revenue stream.
Challenges and Concerns
Industrial Pollution
While WMC’s efforts are commendable, industrial waste entering the lake remains a concern. Authorities like the Maharashtra Pollution Control Board (MPCB) must address this issue comprehensively.
Community Participation
Cleaning Ambazari Lake is a collective responsibility. Raising public awareness about the effects of sewage and industrial waste on water bodies is crucial.
Long-Term Impact of the STP
A Healthier Ecosystem
The reduction of Eichhornia will lead to improved water quality, benefiting local biodiversity and the surrounding community.
Flood Management
In September 2023, Eichhornia blocked culverts near the lake’s overflow point, exacerbating floods in Nagpur. By addressing the weed problem, the STP can help mitigate future flooding risks.
Replicability
This initiative could serve as a model for addressing similar issues in other water bodies across India.
The construction of the Wadi STP is a ray of hope for Ambazari Lake. Once operational, it promises to curb Eichhornia growth, restore the lake’s ecological balance, and improve the lives of Nagpur’s residents. However, addressing industrial waste and fostering community involvement are equally vital for long-term success.
1. What is the primary cause of Eichhornia growth in Ambazari Lake?
The main cause is nutrient-rich sewage entering the lake, which provides an ideal environment for Eichhornia to thrive.
2. How will the STP help in controlling Eichhornia?
The STP will treat 11 million liters of sewage daily, reducing the nutrient inflow that fuels Eichhornia growth.
3. When will the STP be operational?
The STP is expected to be fully operational in six months.
4. Can treated sewage water be reused?
Yes, WMC plans to supply treated water to Hingna MIDC, contributing to water conservation efforts.
5. Who is responsible for industrial pollution in Ambazari Lake?
While industrial pollution is a concern, authorities like MPCB must investigate and address this issue.
