River Rejuvenation STP
River Water Rejuvenation Through STP Optimization
Enhancing Sewage Treatment Plant (STP) biological performance with Odour Eliminator Decomposer (OED) to deliver clean, compliant river discharge across India.
Biological augmentation for ASP, MBBR, MBR & SBR sewage plants.
Why Rivers Remain Polluted Despite STPs
River pollution remains a critical national environmental challenge despite the widespread installation of municipal Sewage Treatment Plants (STPs). While population growth and industrialization are frequently blamed, the underperformance of existing STPs plays a significantly responsible role in this situation.
How Rivers Remained Clean Without STPs
Understanding natural river self-purification mechanisms before industrial urbanization.
1. Natural River Self-Purification
Before 1970, large populations of indigenous cattle maintained agricultural soil health. Soil rich in diverse native microorganisms was washed during rains into river streams, providing continuous microbial replenishment.
Cascading flows from mountainous origins promoted natural aeration, maintaining high Dissolved Oxygen (DO) levels capable of self-purifying organic runoff.
2. Modern Wastewater Treatment Systems
Modern domestic and municipal sewage systems rely on four primary biological processes:
- ASP: Activated Sludge Process
- MBBR: Moving Bed Biofilm Reactor
- MBR: Membrane Bioreactor
- SBR: Sequential Batch Reactor
3 Key Challenges in STP Operations
Shock Load Variations
Organic loads in municipal wastewater fluctuate wildly during peak hours, disrupting biological stability and lowering treatment efficiency.
Process Instability
Power outages, mechanical failures, or toxic spikes disturb microbial activity, causing incomplete organic oxidation.
Odour Generation
Foul smells caused by organic decay in dead zones such as pipe bends, joints, valves, and tank corners.
Gap Between Designed and Actual STP Performance
A major discrepancy exists between the designed capacity of municipal STPs and their actual operational performance:
- Electricity Usage: Usage is far below expected levels, suggesting plant underutilization.
- Sludge Generation: Sludge volume generated is much below expected design thresholds.
- Direct River Pollution: Partially treated wastewater gets discharged into river bodies daily.
The Proposed Solution: OED Application
Dosing Odour Eliminator Decomposer (OED) at the initial Equalisation Tank stage.
OED is applied directly in the Equalisation Tank, introducing a high-density, diverse microbial population at the very start of the treatment chain.
Accelerates organic matter breakdown before aeration.
Drastically reduces excess sludge accumulation across tanks.
Eliminates foul hydrogen sulfide and ammonia odors.
Optimal biological dosing ratio for municipal sewage plants.
Key Benefits of Using OED in STPs
Dramatically boosting plant performance and water discharge quality.
Improved STP Efficiency
Enhances overall biological treatment throughput and organic degradation rates.
Cleaner River Water Discharge
Lowers BOD, COD, and suspended solids, supporting clean river discharge standards.
Process Stabilization
Buffers against shock loads, temperature variations, and temporary power failures.
Faster Troubleshooting
Enables rapid recommissioning of biological tanks after maintenance or upset events.
Lower Tertiary Load
Reduces chemical coagulant consumption and secondary filtration load.
Mosquito & Odour Control
Natural larvicidal properties eliminate fly and mosquito breeding around plant sites.
Case Study: 50 MLD Municipal STP in Pune
Real-world operational breakthrough achieved through Primary Tank OED culture dosing.
Initial Plant Bottlenecks (2007–2010)
- Heavy sludge accumulation of 55–60 tonnes in tanks
- Extremely high inlet BOD levels exceeding design limits
- Inefficient aeration blower performance & fouled diffusers
- Suboptimal sludge management and plant operating below capacity
OED Breakthrough Interventions & Results
- Dosed OED culture in Primary Settling Tank → Reduced inlet BOD by 20–25%
- Complete removal of 60 tonnes of accumulated sludge
- Replaced undersized heat exchanger & cleaned diffusers
- Result: Achieved 100% design capacity with superior water quality!
“Optimizing Existing STPs is the Fastest Route to Cleaner Rivers.”
River rejuvenation efforts must go beyond infrastructure expansion and focus on optimizing the performance of existing assets. Odour Eliminator Decomposer offers a sustainable, economical, and scalable bio-solution.