Temporary solution to help maintain plant uptime
The Veolia Environmental Services Energy Recovery Facility (ERF) at North Quay, Newhaven, handles 210,000 tonnes per year of residual municipal solid waste and street cleansing waste from the East Sussex area. Residual wastes are those that are not reused, composted or recycled. These wastes are incinerated to fuel two 50bar water tube boilers to generate steam which drives a turbine generating 19MW of electricity, most of which is exported to the grid. The process significantly reduces the volume of waste disposed of to landfill and also allows some of its residue to be recovered or recycled.
The high pressure boilers operate at 43.7m3/h steam flow and require the water treatment plant to have an operational capability of up to 4.5m3/h of high purity water. Demineralised water is produced on site by an ion exchange plant supplied by the construction contractor, but during a control system modification the plant would be unable to meet normal output quantity and quality. The demineralised water storage was identified as being insufficient to meet the operational requirements for the two days it would take to make the modifications.
Newhaven ERF has a service contract with ELGA Process Water which also includes the AQUAMOVE Contingency Plan, so one call to their Account Manager had an AQUAMOVE mobile solutions plant on site within a few hours.
Newhaven ERF had used AQUAMOVE during commissioning and for planned maintenance, so the AQUAMOVE team knew exactly where to set up and connect two MOFI™ ion exchange units. The ion exchange MOFI™ units are regenerated off site so there was no requirement for chemicals or wastewater disposal.
Facilities Manager, Phil Preece, was pleased with the response provided by AQUAMOVE, "The temporary plant helped us out of a situation that could not be avoided. It enabled us to continue running at full capacity while the control system modifications were being implemented, thus allowing the on-site plant to return to normal operation."