Effluent Treatment Plant (ETP) Units
QTech Engineering Services provides high-performance Effluent Treatment Plant (ETP) solutions engineered specifically for hot dip galvanizing plants, pickling lines, and chemical processing industries.
Our systems are designed to handle high iron, zinc, and acidic effluents, ensuring full compliance with Pollution Control Board (PCB) norms while minimizing operating costs.
The Challenge
Galvanizing and pickling operations generate wastewater containing:
- High concentrations of Iron (Fe), Zinc (Zn), and heavy metals
- Strong acidic and alkaline streams
- Suspended solids, sludge, and chemical residues
If not treated correctly, these effluents can lead to:
- Environmental violations and penalties
- Groundwater contamination
- Corrosion of civil structures
- Frequent plant shutdowns
An efficient ETP is not just a regulatory requirement — it is essential for sustainable plant operations.
Our Specialized Treatment Process
Our ETP systems follow a multi-stage treatment philosophy to ensure consistent performance and long-term reliability.
Phase I: Collection & Equalization
- Effluent from rinse tanks, floor wash, and process drains is collected in a centralized equalization tank
- Air agitation ensures uniform mixing and prevents solids settlement
- Constructed using PP / FRP / RCC with acid-resistant lining
Phase II: Neutralization, Coagulation & Flocculation
- Automated dosing of lime, caustic soda, or neutralizing agents
- Online pH control ensures precise chemical consumption
- Coagulants and polyelectrolytes convert fine particles into settleable flocs
Phase III: Primary Clarification
- Clarification using Tube Settlers or Lamella Clarifiers
- High-efficiency settling removes heavy metals and suspended solids
- Compact footprint requiring up to 50% less space than conventional clarifiers
Phase IV: Filtration & Polishing
- Dual Media Filters (DMF) remove residual turbidity
- Activated Carbon Filters (ACF) eliminate color, odor, and organic contaminants
- Treated water meets PCB discharge or reuse standards
Solutions & Benefits
We design, supply, install, and commission effluent treatment plants that handle all wastewater streams from galvanizing operations including pickling effluent, degreasing wastewater, and rinse water.
- Iron Oxidation & Removal Systems
- Support modules for spent acid management
- Treatment solutions for chrome-free passivation rinse water
- Integration with flux and pickling lines
Sludge Management & De-Watering
- Efficient sludge handling reduces disposal costs and improves housekeeping.
- Hydraulic / Manual Filter Press Systems
- Produces dry sludge cakes suitable for authorized disposal
- Minimizes sludge volume and transport costs
- Designed as per hazardous waste handling norms
Zero Liquid Discharge (ZLD) Solutions
- For plants operating under strict water discharge regulations, we offer ZLD systems:
- Reverse Osmosis (RO) for water recovery (70–80%)
- Multi-Effect Evaporators (MEE) for RO reject treatment
- Enables complete reuse of treated water within the plant
Key Features & Benefits
- Acid-Proof Construction : Designed specifically for galvanizing waste — no corrosion failures.
- Compact Design: Lamella-based systems reduce space requirement by up to 50%.
- Low Chemical Consumption: Automated dosing minimizes operating expenses.
- Water Recycling Ready: Easily upgradable to ZLD or reuse systems.
- Regulatory Peace of Mind: Complete technical documentation support for PCB approvals.
Equipment & Components
- Equalization tanks with air agitation
- Neutralization tanks with dosing systems
- Tube Settlers / Lamella Clarifiers
- Dual Media & Activated Carbon Filters
- Sludge Filter Press
- Chemical dosing systems
- Online pH & flow sensors
Frequently Asked Questions
What size ETP is required for a galvanizing plant?
ETP capacity depends on your production volume, pre-treatment tank sizes, and rinsing frequency. Typically, a 500T galvanizing plant requires 15-25 KLD (Kiloliters per Day) ETP capacity.
How often does sludge need to be disposed?
