How It Works
For effective Acid and Alkali Waste Gas Treatment, pollutants are divided into two main groups: acidic gases such as SO₂, HCl, H₂S, HF, and acid aerosols, and alkaline gases such as ammonia, amines, and other basic vapours. Because each requires different neutralisation mechanisms, AQUIPTEC designs multi-stage systems combining chemical absorption and adsorption for maximum efficiency.
1- Waste Gas Collection
Emissions are captured at the source from tanks, process units, or covered sewage systems and conveyed through corrosion-resistant ducting to the treatment system.
2- Acid Wash Tower
This stage removes alkaline gases such as ammonia and amines by absorbing and neutralising vapours, controlling odour and nitrogen compounds, using oxidising or acidic solutions such as sodium hypochlorite, and removing particulates and soluble contaminants.
3- Alkali Wash Tower
The gas then enters the alkali wash tower, where acidic gases are neutralised using sodium hydroxide (NaOH), lime or limestone slurry, or other alkaline chemicals. Acid gases are converted into stable salts, reducing corrosion and protecting downstream equipment.
4- Activated Carbon Adsorption
An activated carbon polishing stage removes residual odours, VOCs, trace pollutants, and remaining harmful compounds, ensuring compliance with strict emission limits.
5- Clean Gas Discharge
Purified gas is safely discharged through a stack once environmental standards are met.
6- Effluent Treatment and Recycling
Spent scrubbing liquids are neutralised, treated, and recycled to reduce chemical use, wastewater discharge, and operating costs.
Applications
Petrochemical Industries
Surface Finishing
Biotechnology
Electronics Manufacturing
Food Processing
Metals
Wastewater Treatment
Environmental Facilities.
Core System Components
AQUIPTEC designs and supplies complete Acid and Alkali Waste Gas Treatment systems, which typically include:
- Waste gas collection and ducting
- Acid wash scrubber tower
- Alkali wash scrubber tower
- Structured packing and spray systems
- Activated carbon adsorption chamber
- Chemical dosing and pH control
- Pumps, tanks, and recirculation systems
- Mist eliminators and droplet separators
- Corrosion-resistant materials such as FRP, PP, and HDPE
- Automation, instrumentation, and monitoring
- Effluent neutralisation and treatment
Each system is customised to match process conditions, gas composition, and environmental requirements.
Key Benefits
High Removal Efficiency
Multi-stage Acid and Alkali Waste Gas Treatment achieves excellent removal of both acidic and alkaline pollutants.
Effective Odour and VOC Control
Combines chemical scrubbing with activated carbon adsorption.
Flexible and Scalable
Suitable for small plants, large industrial facilities, and retrofits.
Corrosion Protection
Extends the life of process equipment and ducting.
Integrated Air Pollution Control
Compatible with dry sorbent injection, biofilters, and thermal oxidation.
Environmental Compliance
Supports strict Australian and international emission standards.
Why Choose AquipTec
AQUIPTEC is a trusted provider of advanced Acid and Alkali Waste Gas Treatment solutions across Australia. We deliver complete turnkey systems, from engineering and design to commissioning and ongoing technical support.
Our strengths include:
- Advanced process design and optimisation
- Customised multi-stage treatment technologies
- Integration with DSI air pollution systems
- High-quality materials and long equipment life
- Local Australian service and rapid support
- Energy-efficient and cost-effective solutions
- Full compliance with environmental and safety standards
We partner with our clients to develop sustainable, future-ready emission control solutions that improve operational performance and environmental outcomes.
Frequently Asked Questions (FAQ)
What is Acid and Alkali Waste Gas Treatment?
Acid and Alkali Waste Gas Treatment is a process used to remove corrosive and toxic emissions such as sulfur dioxide, hydrochloric acid, ammonia, and amines from industrial exhaust streams. It typically uses chemical scrubbers, neutralisation, and adsorption technologies to ensure environmental compliance and workplace safety.
Which industries require Acid and Alkali Waste Gas Treatment systems?
Industries such as chemical processing, electroplating, semiconductor manufacturing, wastewater treatment, fertiliser production, pharmaceuticals, and metal refining commonly require Acid and Alkali Waste Gas Treatment to control emissions and meet environmental regulations
How do chemical scrubbers remove acid and alkaline gases?
Chemical scrubbers use a liquid solution to absorb and neutralise pollutants. Acidic gases are treated with alkaline solutions such as sodium hydroxide or lime, while alkaline gases like ammonia are removed using acidic or oxidising solutions. This process converts harmful gases into stable compounds.
What are the benefits of multi-stage Acid and Alkali Waste Gas Treatment?
Multi-stage systems provide higher removal efficiency, better odour control, improved corrosion protection, and compliance with strict emission limits. Combining acid washing, alkali washing, and activated carbon adsorption ensures reliable and long-term performance.
How do I select the right Acid and Alkali Waste Gas Treatment system?
The best system depends on gas composition, flow rate, temperature, and regulatory requirements. AQUIPTEC provides customised solutions based on process analysis, pilot testing, and detailed engineering to ensure optimal performance and cost-effective operation.