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Acid Mine Water to Environmental Discharge Specification ( ZLD Plant )

zero liquid discharge water treatment plant

THE CHALLENGE

The Anglo Thermal Coal Greenside Colliery needed the treatment of excess underground mine water in order to ensure continued access to resources. The mine water is typical of acid mine drainage (AMD).

OUR SOLUTION

The duration of the treatment and future volumes were uncertain, which is why a mobile treatment plant was installed allowing for potential future expansion, ease of decommissioning and rehabilitation once treatment is completed. The plant was designed as a zero liquid discharge (ZLD) treatment facility.

HOW PROXA ADDED VALUE

PROXA achieved a zero liquid brine generation plant using non thermal processes, protecting the environment and assisting the client in managing their future legacy risk associated with the storage of brine and salts on site. PROXA is responsible for the operations and maintenance supervision of the water treatment plant, including technical support and optimisation of the lifecycle costs associated with the operations of the plant.

FEED WATER

Acid mine drainage

PRODUCT WATER

Compliant water for environmental discharge and reuse.

PERFORMANCE TARGET

  • Feed flow rate 360 kl/day (7 MLD)
  • Conductivity 900 uS/cm
  • Availability 90%

PROCESS

  • Metal oxidation
  • Clarification
  • Ultra filtration
  • Reverse osmosis
  • Brine treatment

PROCESS RELIABILITY

In dealing with variable feed streams such as contaminated mine water, process robustness and operational flexibility is of critical importance in continuously meeting environmental discharge requirements.

PROXA is a leader in the field of process innovation. Through our in-house process development laboratory, PROLAB®, and the support of PROSERV® – which optimises life cycle costs for chemicals, consumables and spares – we are able to assist with the rapidly changing requirements of mining clients.

ENVIRONMENTAL PROTECTION

PROXA has a proven track record in delivering and operating systems capable of treating variable effluent mine water, working with all stakeholders to ensure the protection of the environment and the supply of potable water to surrounding villages.


Client: ANGLO AMERICAN

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