The Halia® pH Neutralisation system dissolves carbon dioxide to provide accurate pH control.
It can be difficult to neutralise alkaline waste water. Conventional treatment often uses sulphuric or hydrochloric acid to correct pH.
The aggressive nature of these acids means that neutralising wastewater with dissolved carbon dioxide has many advantages.
• Better working conditions
No more burns, poisonous fumes and other risks resulting from the handling of mineral acids.
• Accurate pH control
The risks of excessive acidification using strong acids areprevented
• Low initial investment
There are various application systems, but all involve simple, safe and compact equipment.
• Automated process
The automation means that staff do not handle corrosive acids or transport them inside the plant.
• Continuous operation
The pH is controlled automatically, without need for significant maintenance
The use of carbon dioxide is very economical and cuts down on indirect operating costs.
In the Halia® pH Neutralisation system, gas contact is made within pipe sections distributed in a compact unit. This unit forms the basis of the process in order to dissolve the CO2 in the re-circulated process water.
The carbon dioxide dose is adjusted according to feedback control based on the pH, which is measured via an in-line probe.