BioteQ’s ChemSulphide®sulphide precipitation process has been applied to treat groundwater containing elevated levels of zinc and cadmium from a closed industrial site in the US. BioteQ provided process design, engineering, procurement and construction review, and plant commissioning services, and continues to provide ongoing operations support for the project.
Commissioned in 2010, the ChemSulphide® plant has a capacity of 850 m3/day. The plant produces clean water that meets very strict water quality criteria for discharge to the environment, and recovers zinc and cadmium metal by-products that are sold and refined into useful products, offsetting the cost of water treatment.
The plant does not generate a waste sludge with special disposal requirements or ongoing management.
The application of BioteQ’s technology at this site provides economic and environmental benefits. The plant:
- Produces high quality treated water that complies with strict water quality regulations for discharge directly to the environment.
- Produces no waste sludge that would otherwise require long-term storage and management.
- Removes heavy metals from the environment, producing saleable metal products that can be recycled into useful products, offsetting the cost of water treatment.
- Reduces the environmental liability associated with metal-laden wastewater.