Electro-coagulation is selected for arsenic removal and groundwater remediation.
THE CHALLENGE
A chemical manufacturer required the treatment of arsenic contaminated ground water at their site. The product water needed be of a quality acceptable for discharge to an industrial sewer and comply with the regulative guidelines in terms of arsenic disposal.
OUR SOLUTION
PROXA was involved from the onset of the project. We evaluated a number of different technologies – and after completing pilot test work – we selected and installed electro-coagulation.
HOW PROXA ADDED VALUE
In addition to the groundwater remediation contract, PROXA is responsible for the operations and maintenance supervision of the water treatment plant. This includes technical support and optimisation of the associated lifecycle costs.
FEED WATER
Contaminated underground water
PRODUCT WATER
Compliant water for discharge to industrial sewer
PERFORMANCE TARGET
Product flow rate: 72 kl/day- Granular activated carbon (GAC)
- Arsenic < 5 ppm
- Availability: 90%
Product flow rate: 72 kl/dayPROCESS
- Lamella clarification
- Granular activated carbon (GAC)
- Electro coagulation
- Sand filtration
- Sludge dewatering
PROCESS RELIABILITY
In dealing with variable feed streams such as contaminated ground and mine water, process robustness and operational flexibility is of critical importance in continuously meeting environmental discharge requirements. 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 of working together with all stakeholders to ensure the protection of the environment.
Client: A member of the chemical industry
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