Introduction
Industrial wastewater treatment has become a critical priority for modern manufacturing industries, especially in sectors like pharmaceuticals where wastewater is highly complex and potentially hazardous. This case study highlights the successful design, installation, and operation of a 10 KLD Effluent Treatment Plant (ETP) for Renata Ltd, a leading pharmaceutical company in Bangladesh.
The project was executed by V Aqua, a well-established wastewater treatment solutions provider, known for delivering customized and efficient ETP systems across South Asia. The primary goal was to build a compact, cost-effective, and high-performance system capable of treating pharmaceutical wastewater while ensuring strict compliance with environmental regulations.
Understanding the Need for Pharmaceutical ETP
The pharmaceutical industry generates some of the most challenging wastewater streams among all industrial sectors. The effluent typically contains:
- Active pharmaceutical ingredients (APIs)
- Organic and inorganic chemicals
- Solvents and intermediates
- Cleaning agents and disinfectants
- Biological contaminants
If not treated properly, such wastewater can lead to severe environmental pollution, groundwater contamination, and legal consequences. Therefore, installing a robust ETP system is not just a regulatory requirement but also an environmental responsibility.
Project Overview
Renata Ltd required a reliable wastewater treatment system for its Pokhara facility in Bangladesh. The company needed an ETP with a capacity of 10 kilolitres per day (KLD) that could handle fluctuating loads and complex effluent composition.
V Aqua was entrusted with delivering a complete turnkey solution, including:
- Process design and engineering
- Equipment manufacturing and supply
- Installation and commissioning
- Operator training and handover
The objective was to ensure consistent treatment performance while minimizing operational costs and space requirements.
Key Challenges Faced by the Client
Before implementing the ETP system, Renata Ltd encountered several wastewater management issues that required immediate attention:
1. High COD and BOD Levels
Pharmaceutical wastewater is rich in organic matter, resulting in elevated Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD). These high levels make treatment more complex and energy-intensive.
2. Complex Chemical Composition
The presence of APIs, solvents, acids, alkalis, and disinfectants created a chemically unstable effluent that could not be treated using conventional methods.
3. Variable Flow and Shock Loads
Irregular production cycles caused fluctuations in wastewater volume and pollutant concentration, leading to sudden shock loads that could disrupt biological treatment systems.
4. High Suspended Solids and Turbidity
Large amounts of suspended particles increased turbidity, making it unsuitable for discharge without proper clarification.
5. Compliance Risks
Strict discharge regulations imposed by Bangladesh’s environmental authorities meant that non-compliance could result in heavy penalties, shutdowns, and reputational damage.
6. Limited Space Availability
The facility had restricted space, requiring a compact yet efficient treatment system without compromising performance.
Customized ETP Solution
After conducting a detailed site analysis and wastewater characterization study, V Aqua proposed a multi-stage ETP system designed specifically for pharmaceutical effluent.
Design Objectives
The system was engineered based on the following principles:
- Effective treatment of high-strength pharmaceutical wastewater
- Integration of physical, chemical, and biological processes
- Compact and modular design for limited space
- Automation for consistent performance
- Cost-efficient operation with minimal maintenance
Step-by-Step Treatment Process
The 10 KLD ETP operates through a carefully structured treatment sequence, where each stage targets specific contaminants.
1. Bar Screen Chamber
The incoming wastewater passes through a bar screen to remove large solids such as debris, plastics, and fibers, protecting downstream equipment.
2. Equalization Tank
This unit stabilizes flow rate, pH, and pollutant concentration, ensuring uniform conditions for further treatment.
3. Coagulation Tank
Chemical coagulants are added to neutralize charges on suspended particles, initiating aggregation.
4. Flocculation Tank
Gentle mixing helps form larger flocs that can settle easily in the next stage.
5. Primary Tube Settler
The flocs settle down, reducing suspended solids and turbidity significantly.
6. Aeration Tank
This is the core biological treatment stage, where microorganisms break down organic pollutants, reducing COD and BOD.
7. Secondary Tube Settler
Biological sludge is separated from treated water, ensuring clarity and stability.
8. Chlorine Contact Tank
Disinfection is carried out to eliminate pathogens and harmful microorganisms.
9. Activated Carbon Filter (ACF)
This stage removes color, odor, and residual organic compounds.
10. Pressure Sand Filter (PSF)
Final polishing ensures removal of fine particles, delivering clear and compliant effluent.
Advanced Technology Features
The ETP system incorporated several modern features to enhance efficiency and reliability:
Compact Design
The entire system was designed to occupy minimal space, making it ideal for facilities with limited infrastructure.
Automated Chemical Dosing
Precision dosing pumps ensure accurate addition of chemicals, reducing wastage and improving treatment consistency.
Dual-Stage Clarification
The use of tube settlers in both primary and secondary stages enhances solid removal efficiency while saving space.
Extended Aeration System
This method improves organic removal efficiency and reduces sludge production, lowering operational costs.
Dual Polishing Units
The combination of ACF and PSF ensures superior final water quality, even during fluctuations in influent characteristics.
Efficient Sludge Management
Sludge is handled through drying beds, reducing disposal costs and simplifying handling.
Energy Optimization
Energy-efficient blowers and aeration systems reduce electricity consumption, making the plant cost-effective.
Performance Results
After commissioning, the ETP consistently achieved excellent treatment results, meeting all regulatory standards.
Key Performance Metrics
| Parameter | Influent | Effluent | Reduction |
|---|---|---|---|
| COD | 1200–1800 mg/L | < 250 mg/L | > 85% |
| BOD | 600–900 mg/L | < 30 mg/L | > 95% |
| TSS | 400–700 mg/L | < 50 mg/L | > 90% |
| pH | 5.0–9.5 | 6.5–8.5 | Neutralized |
| Turbidity | > 100 NTU | < 5 NTU | > 95% |
| Coliform | Present | Absent | 100% |
| Oil & Grease | 50–120 mg/L | < 10 mg/L | > 90% |
These results demonstrate the plant’s capability to handle complex pharmaceutical wastewater effectively.
Benefits Achieved by the Client
1. Regulatory Compliance
The plant ensures full compliance with environmental discharge standards, eliminating the risk of penalties or shutdowns.
2. Cost Savings
- Reduced chemical consumption
- Lower energy usage
- Minimal sludge handling costs
- Efficient turnkey execution
3. Environmental Protection
The system prevents harmful chemicals from entering natural water bodies, protecting ecosystems and public health.
4. Operational Efficiency
The automated and modular design simplifies operation and maintenance, ensuring long-term reliability.
5. Business Reputation
By adopting sustainable practices, the company strengthens its brand image and gains trust from stakeholders.
Sustainability Impact
The installation of the ETP significantly contributes to environmental sustainability by:
- Reducing industrial pollution
- Protecting nearby water sources
- Supporting eco-friendly manufacturing practices
- Aligning with global sustainability and ESG goals
Conclusion
The successful implementation of the 10 KLD Effluent Treatment Plant at Renata Ltd demonstrates how a well-engineered and customized solution can effectively tackle complex pharmaceutical wastewater challenges.
From handling high COD and BOD levels to ensuring consistent regulatory compliance, the project showcases the importance of advanced treatment technologies and expert execution.
This case study serves as a benchmark for industries seeking reliable, efficient, and sustainable wastewater treatment solutions. Whether dealing with small-scale operations or large industrial setups, a properly designed ETP is essential for environmental protection, regulatory compliance, and long-term business success.
Get in Touch
If your organization is facing challenges related to industrial wastewater treatment, compliance, or sustainability, investing in a customized Effluent Treatment Plant can be the right step forward.
Explore advanced solutions tailored to your industry needs and ensure a cleaner, safer, and more sustainable future.
Book a Demo or Site Visit
Whether you’re looking to install a ETP at home or a large-scale plant for your business, V Aqua provides end-to-end consultation and on-site inspection.
Mobile: 7827654995 / 9560654995
Email: sales@vaqua.in
Website: www.roservicepoint.com
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