Mondi, the pulp and paper and packaging division of Anglo American plc, is among the leading international manufacturers of business paper and packaging.

At its Richards Bay Mill (Northern KwaZulu-Natal) Mondi produces 575,000 tons of eucalyptus pulp and whitetop kraftliner.

As a result of a 40% increase in its capacity for bleached eucalyptus pulp production, Mondi Ltd required a new secondary effluent treatment plant which would :

• treat and reduce the COD, BOD₅ and AOX pollutant loads
• provide high availability and optimized performance and be easy to operate
  
  

Mondi Paper Ltd awarded Aquaflow (a Veolia Water Solutions & Technologies' company) the extension of the wastewater treatment plant using an activated sludge treatment based on MBP (Minimum Biosludge Production).

The extension is composed of :

• MBP selector plug flow process
• secondary clarifier with a built-in thickener
• excess sludge dewatering with centrifuges

The installation has the following advantages :

• compactness
• low sludge production
• easy to operate