Background
The Newhaven wastewater treatment plant in Sussex treats domestic sewage from the coastal town of Newhaven located on the South coast. The plant comprises preliminary treatment (screens, grit removal), primary settlement (de Hoxar Spiral separators) and a conventional activated sludge process for biological purification of the wastewater.
The Overall Objective
As part of its processing operation, solids are removed by both the primary treatment and by the secondary biological treatment in final settlement tanks. Without removal the solids would build up in the process leading to overloading of the final tanks risking breaching the final effluent discharge consent. Newhaven has a similar Siltbuster unit permanently installed to help control the mix liquor suspended solids concentration within the aeration tanks, but due to a temporary reduced capacity in the primary treatment due to a failed spiral separator, they required a similar sized unit for hire at short notice that could cope with the increased solids loading on the activated sludge process.
Solution
Siltbuster Process Solutions installed a D100 DAF to cope with the increased solids loading on the activated sludge process within the limited space on site. The unit also ensured that the volume of the sludge removed from site was drastically reduced saving road tanker costs.
