In India’s rapidly growing wastewater treatment and effluent treatment industry, only a few companies have established themselves among the top manufacturers. Renowned names like Thermax, Sintex, Praj Industries, and VA Tech Wabag are widely recognized.
Among them,
Ventilair Engineers Pvt. Ltd. stands out as one of the top and most trusted manufacturers of Hybrid ETP / Biological ETP cum STP systems, also widely known as Double Tube Settler ETP and Containerized Bio ETP—a unique and high-performance solution for industries dealing with both high BOD and high COD effluent.
Hybrid ETP (ETP + STP) | Double Tube Settler Based Bio ETP
In many industries, wastewater contains a complex combination of high COD, high BOD, oil & grease, color, chemicals, and organic load.
Typically, solution providers recommend separate ETP and STP systems, increasing cost, footprint, and operational challenges.
To overcome this, Ventilair Engineers Pvt. Ltd. has developed an advanced Hybrid ETP, which integrates:
Physico-Chemical Treatment (ETP)
Biological Treatment (STP – MBBR Technology)
Clarification through Double Tube Settler System
All combined into a single, efficient, and compact treatment plant, also available in containerized bio ETP format for plug-and-play applications.
What Makes This Hybrid / Double Tube Settler ETP Unique
✔ ETP + STP Combined System
A complete Hybrid Biological ETP eliminating the need for separate plants
✔ Double Tube Settler Technology
High-efficiency solid-liquid separation, improving clarification and reducing sludge load
✔ Containerized Bio ETP Option
Fully pre-fabricated, modular, and transportable system for quick installation
✔ Designed for High COD & High BOD Effluent
Perfect for mixed wastewater (industrial + domestic)
✔ Complete Multi-Stage Treatment
Primary → Secondary (MBBR Bio Treatment) → Tertiary → UF (Optional)
✔ Advanced Filtration & Polishing
Includes PSF, ACF, Micron Filtration, and Ultra Filtration (UF)
✔ Efficient Sludge Management
With Filter Press / Sludge Dewatering System
✔ Odour-Free & Enclosed System
Available in covered capsule, containerized, or civil structure formats
✔ Smart Monitoring & Automation
With PLC, SCADA, sensors, flow meters, dosing systems
Applications – Ideal for High Load Effluent Industries
This Hybrid ETP / Double Tube Settler Bio ETP is highly effective in:
Hospitals & Healthcare
Hotels & Hospitality Sector
Sugar Mills & Food Processing Units
Textile & Dyeing Industries
Pharmaceutical & Chemical Plants
Printing & Packaging Industries
Restaurants, Canteens & Commercial Kitchens
Any application with high BOD, COD & mixed wastewater streams
Engineering Strength & Execution Excellence
With 2000+ successful installations, Ventilair Engineers Pvt. Ltd. has strong expertise in:
Hybrid ETP / Biological ETP / Double Tube Settler ETP systems
Containerized Bio ETP & Packaged STP solutions
Underground STP systems, especially in Gurugram
Conventional RCC-based treatment plants
Installations at Indira Gandhi International Airport, Prayagraj Airport, and Ayodhya Airport
Specialized containerized systems at Central University of Jammu
Technical Highlights
Technology: Physico-Chemical + MBBR + Double Tube Settler
Process Flow: Equalization → Coagulation/Flocculation → Double Tube Settler → Aeration (MBBR) → Secondary Clarifier → Filtration → UF (Optional)
Output Parameters:
BOD < 10–20 mg/L, COD < 50–100 mg/L, TSS < 10 mg/L (design dependent)
Automation: Semi / Fully Automatic (PLC-SCADA Based)
Sludge Handling: Filter Press / Centrifuge
Design Options: Containerized / Capsule / Civil / Underground
Odour Control: Covered & Enclosed System
A Smart & Future-Ready Hybrid Treatment Solution
The VEPL Hybrid ETP, also known as Double Tube Settler ETP and Containerized Bio ETP, is a cost-effective, space-saving, and high-performance solution that ensures:
✔ Reduced CAPEX & OPEX
✔ Compact footprint
✔ Easy operation & maintenance
✔ High treatment efficiency
✔ Compliance with Pollution Control Norms
✔ Water reuse & sustainability
Positioning Statement
“Ventilair Engineers Pvt. Ltd. is among India’s top manufacturers, delivering advanced Hybrid ETP solutions—also known as Double Tube Settler and Containerized Bio ETP—engineered for industries with high BOD and COD challenges.”
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