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POND BIOREMEDIATION CASE STUDY
How a 1,500 m³ Natural Pond Achieved Algal Bloom Control
Client Profile: Global High-Precision Metrology & Additive Manufacturing Group (77 Offices in 36 Countries)
Location: Pune, Maharashtra, India | Scale: 1,500 m³ Natural Pond (25m × 15m × 4m Depth)
Integrated Solution: BactaServe – Pond Cleaner & Hyper Oxygenation Reactor (HOR) Nanobubble Aeration
COD Reduction
79.7%
BOD Reduction
91.8%
Zero Algae
100% Eco-Friendly Restoration
A 1,500 m³ natural pond in Pune experienced severe algal blooms and eutrophication due to elevated ammoniacal nitrogen, phosphorus, COD and BOD. Amalgam Biotech implemented BactaServe Pond Cleaner with Hyper Oxygenation Reactor technology to support biological pollutant degradation and oxygen transfer, reducing COD from 152.99 to 31 mg/L and BOD from 61 to 5 mg/L.
Background & Technical Challenge
Site Overview
A global high-precision metrology and healthcare technology group operates a facility in Pune, Maharashtra, with a natural pond located within the premises. The organisation operates across 77 offices in 36 countries, with more than 5,000 employees worldwide.
The natural pond measures approximately 25 m × 15 m, with an average depth of 4 m, giving a total water volume of approximately 1,500 m³. During the monsoon season, the pond fills with rainwater and receives nutrient-rich inflows, creating conditions favourable for algae and algal bloom formation.
Over time, elevated levels of ammoniacal nitrogen, phosphorus, COD and BOD affected the pond's ecological balance. The nutrient-rich conditions promoted algal growth, while the organic load increased the oxygen demand required for biological degradation.
The restoration programme therefore required an approach capable of reducing organic pollutants and nutrients while providing sufficient oxygen to support biological activity, rather than relying on chemical algal treatment.
The Technical Challenge & Risk
Nutrient-Driven Algal Blooms: Elevated ammoniacal nitrogen and phosphorus created favourable conditions for excessive algal growth and eutrophication.
High Organic Load: COD of 152.99 mg/L and BOD of 61 mg/L created a significant biological oxygen demand within the pond.
Insufficient Oxygen Availability: Insufficient natural oxygen levels limited bacterial activity and reduced the rate of biological degradation of nutrients and organic matter.
Oxygen-Depleted Zones: High biological oxygen consumption could create oxygen-depleted areas, restricting bacterial activity and affecting aquatic conditions.
Recurring Algal Growth: High nutrient availability, particularly during monsoon inflows, created favourable conditions for recurring algal bloom formation.
Need for Eco-Friendly Restoration: The solution supported biological nutrient and organic matter removal while enhancing oxygen availability through HOR technology and reducing chemical intervention.
Pre-Restoration Pond Assessment
Before implementing the pond restoration programme, the site was assessed to understand the pond dimensions, nutrient loading, algal bloom formation and oxygen requirements for biological treatment. The assessment established the pond volume and the key water quality parameters requiring remediation.
Assessment Highlights
Pond Volume Assessment: Confirmed a 25 m × 15 m pond with 4 m average depth, giving an estimated water volume of 1,500 m³.
Water Quality Assessment: Established baseline COD of 152.99 mg/L, BOD of 61 mg/L, ammoniacal nitrogen of 0.49 mg/L and phosphorus of 0.257 mg/L.
Algal Bloom Assessment: Identified recurring algal bloom formation associated with elevated nutrient levels and monsoon rainwater inflows.
Oxygen Requirement Assessment: Determined that additional oxygen supply was required to support bacterial degradation of COD, BOD, nitrogen, phosphorus and algal biomass.
Pond Bioremediation Strategy
Why BactaServe™ Pond Cleaner & HOR Were Selected
To restore the natural pond ecosystem and address algal blooms, elevated COD/BOD and nutrient loading, Amalgam Biotech implemented BactaServe Pond Cleaner together with Hyper Oxygenation Reactor (HOR) technology. The combined approach was selected to support biological degradation while providing the oxygen required for bacterial activity.
BactaServe Pond Cleaner uses a combination of bacterial bioculture and enzymes to break down nutrient-rich algal biomass and organic deposits. The HOR supplies oxygen by capturing atmospheric oxygen and transferring it into the pond through fine bubbles, creating conditions that support bacterial activity and improve water quality.
Key Benefits
Supports biological degradation of algal biomass
Reduces COD and BOD in the pond
Supports reduction of nitrogen and phosphorus
Improves oxygen availability for bacterial activity
Helps control nutrient-driven algal blooms
Supports natural biological restoration of the pond
Reduces reliance on chemical algal treatment
Biological Restoration Mechanism
BactaServe Pond Cleaner and HOR work together to create the conditions required for biological pond restoration.
1. Algal Biomass Breakdown
BactaServe Pond Cleaner supports the biological breakdown of nutrient-rich algal biomass.
2. Organic Matter Degradation
The bioculture helps degrade organic deposits contributing to COD and BOD.
3. Nutrient Reduction
Bacterial activity supports the reduction of nitrogen and phosphorus compounds.
4. Oxygen Enhancement
HOR increases oxygen transfer into the pond, supporting bacterial activity and biological degradation.
Water Quality Baseline vs. Target Remediation Goals
Water Parameter | Pre-Treatment Laboratory Baseline | Target Remediation Goal | Final Achieved Result |
Chemical Oxygen Demand (COD) | 152.99 mg/L | < 50 ppm | 31.0 mg/L (79.7% Drop) |
Biochemical Oxygen Demand (BOD) | 61.00 mg/L | < 10 ppm | 5.0 mg/L (91.8% Drop) |
Ammoniacal Nitrogen (NH₃-N) | 0.490 mg/L | < 0.5 ppm | 0.019 mg/L (96.1% Drop) |
Total Phosphorus (P) | 0.257 mg/L | < 0.5 ppm | 0.033 mg/L (87.2% Drop) |
Total Nitrogen | High Nutrient Load | Baseline Reduction | 0.029 mg/L |
TSS / TDS | 118 mg/L / 474 mg/L | Clean & Non-Turbid | Clear Natural Ecosystem |
*Values shown are project-specific and may vary depending on facility requirements and operating conditions.
Performance Results & Analytics
Key Metrics Achieved
The combined BactaServe Pond Cleaner and Hyper Oxygenation Reactor (HOR) programme improved the pond's organic and nutrient profile while supporting control of algal blooms. The final laboratory results showed substantial reductions in COD, BOD, ammoniacal nitrogen and phosphorus compared with the initial water quality baseline.
Key Performance Results
79.7% COD Reduction: COD decreased from 152.99 mg/L to 31.0 mg/L, exceeding the target of less than 50 mg/L.
91.8% BOD Reduction: BOD decreased from 61.0 mg/L to 5.0 mg/L, exceeding the target of less than 10 mg/L.
96.1% Ammoniacal Nitrogen Reduction: Ammoniacal nitrogen decreased from 0.490 mg/L to 0.019 mg/L, substantially reducing the nutrient load.
87.2% Phosphorus Reduction: Total phosphorus decreased from 0.257 mg/L to 0.033 mg/L, supporting improved nutrient control.
Algal Bloom Control: The biological restoration programme successfully controlled the nutrient-driven algal bloom condition while supporting a healthier pond ecosystem.
Performance Comparison
Environmental Metric | Pre-Treatment State | Post-Bioremediation State |
Surface Visual Quality | Dense Green Algal Bloom | Completely Clear Waterbody |
Chemical Oxygen Demand (COD) | 152.99 mg/L | 31.0 mg/L (Exceeded Target) |
Biochemical Demand (BOD) | 61.0 mg/L | 5.0 mg/L (Exceeded Target) |
Ammoniacal Nitrogen (NH₃-N) | 0.49 mg/L | 0.019 mg/L (Total Clearance) |
Total Phosphorus (P) | 0.257 mg/L | 0.033 mg/L (Total Clearance) |
Ecological Safety | Anaerobic Toxicity Risk | Thriving Aquatic Life |
The 1,500 m³ natural pond experienced nutrient-driven algal bloom formation and eutrophication before the bioremediation programme.
Client Feedback: Pond Restoration & Algal Bloom Control
“Our natural pond was experiencing severe algal bloom formation due to high nutrient levels, along with elevated COD and BOD. After implementing BactaServe Pond Cleaner with the Hyper Oxygenation Reactor, the biological treatment process improved significantly. COD reduced from 152.99 to 31 mg/L, BOD reduced from 61 to 5 mg/L, and the nutrient levels were substantially reduced, helping restore the pond ecosystem.”
Facility Management Team
Global Metrology & Healthcare Technology Facility, Pune, India
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Facing Algal Blooms, Stagnant Odors, or Eutrophication in Your Water Body?
Let our water restoration bio-engineers analyze your pond dimensions, nutrient concentrations, and depth profile to design a custom BactaServe & HOR bioremediation plan.
Step 1: Share your process details and treatment objectives.
Step 2: Our engineers assess your system and operating conditions.
Step 3: Receive a tailored solution and implementation plan.
Frequently Asked Questions
Q1. How did BactaServe Pond Cleaner and HOR eliminate algal blooms in a 1,500 m³ natural pond?
Amalgam Biotech combined BactaServe Pond Cleaner with a Hyper Oxygenation Reactor (HOR) in Pune, Maharashtra. This biological and aeration system reduced excess nutrients, helping control algae while reducing COD by 79.7% from 152.99 to 31 mg/L and BOD by 91.8% from 61 to 5 mg/L.
Performance Highlights:
Target Waterbody: A 1,500 m³ natural landscape pond (25 m × 15 m × 4 m depth) affected by severe monsoon-driven eutrophication.
Nutrient Removal: Ammoniacal Nitrogen (NH₃-N) decreased by 96.1%, from 0.490 to 0.019 mg/L, while Total Phosphorus decreased by 87.2%, from 0.257 to 0.033 mg/L.
Visual Transformation: Thick green algal scum was removed, restoring clear water and a more balanced natural water body.
Q2. How does Hyper Oxygenation Reactor (HOR) technology differ from conventional paddle wheel aerators?
The Hyper Oxygenation Reactor (HOR) captures atmospheric oxygen and introduces ultra-fine nanobubbles throughout the 4-metre water column. Unlike surface paddle wheels, which lose more oxygen to the air, nanobubbles remain suspended for longer, reducing anaerobic zones and supporting bacterial digestion throughout the pond.
Engineering Comparison:
Surface Aerators / Fountains: Provide mainly shallow oxygen transfer and create surface turbulence that can disturb bottom sediments while consuming significant power.
HOR Nanobubble Technology: Provides deeper oxygen transfer, longer bubble residence time, and better oxygen availability for aerobic bacteria near the pond floor.
Q3. Why are ammoniacal nitrogen and phosphorus the primary drivers of pond eutrophication?
Monsoon stormwater can carry fertilisers and organic debris into water bodies, increasing nitrogen and phosphorus levels. These excess nutrients support rapid growth of opportunistic blue-green algae, causing blooms that block sunlight, reduce dissolved oxygen, and can harm aquatic life.
Remediation Mechanism:
Biological Competition: Beneficial bacteria in BactaServe consume available nitrogen and phosphorus, reducing the nutrients available for algal growth.
Natural Starvation: As nutrient levels decrease, algal blooms naturally decline without the use of toxic chemical algaecides.
Q4. How does BactaServe Pond Cleaner biologically break down organic pond sludge and algal biomass?
BactaServe Pond Cleaner provides a specialised consortium of non-pathogenic bacteria and natural enzymes, including proteases, cellulases, and lipases. These enzymes break down dead algal cells and organic bottom sludge, converting complex organic matter into carbon dioxide, water, and stable inorganic minerals.
Biological Mechanisms:
Enzymatic Lysis: Breaks down algal cell structures and decaying plant matter.
Mineralisation: Converts organic sludge into more stable, non-toxic material and can reduce the need for mechanical dredging.
Q5. Why is biological bioremediation superior to chemical algaecides such as copper sulfate?
Chemical algaecides can provide temporary algae control but may leave chemical residues and affect beneficial microorganisms and aquatic life. BactaServe biological bioremediation targets the underlying nutrient overload, supporting long-term ecological balance through biological treatment without relying on chemical algaecides.
Eco-Safety Breakdown:
Chemical Algaecides: Can rapidly destroy algal cells, potentially releasing organic matter and affecting aquatic organisms.
BactaServe + HOR: Uses biological treatment and oxygenation to support nutrient removal, organic matter breakdown, and long-term water clarity.
Q6. What site assessment parameters are required to size a pond bioremediation programme?
Sizing a pond bioremediation programme requires assessing total water volume, surface area (25 m × 15 m), average depth (4 m), seasonal stormwater inflows, baseline COD, BOD, NH₃-N, Phosphorus, and dissolved oxygen profiles. These parameters help determine the required HOR capacity and bacterial dosing.
Turnkey Support: Amalgam Biotech conducts water quality profiling, depth mapping, HOR system placement, and customised bioculture dosing schedules for corporate campuses, golf courses, resorts, and municipal lakes across India.
Written by Ashutosh Vadanagekar
Technical Director, Amalgam Biotech
Ashutosh Vadanagekar has over 22 years of experience in water and wastewater treatment, with expertise in process design and bioculture technology. He develops and implements eco-friendly biological treatment solutions for ETPs and STPs across industries, addressing challenges such as high COD and BOD, ammonia, FOG, odour and biological process instability. He also contributes technical expertise and practical insights to Amalgam Biotech’s wastewater treatment case studies. Connect on LinkedIn