Proceedings

Nereda Low P Trials – Full-scale experience at Walsall Wood WwTW’s: PRESENTATION ONLY

Neil Townend, UK Sales Director, Royal HaskoningDHV, Joshua Paling, Severn Trent Water

(free)

Site Introduction
 Walsall Wood STW was a trickling filter site discharging into the Ford Brook, part of the River Tame catchment.
 Under the Water Framework Directive, new effluent standards – BOD: 10 mg/l; NH3: 1.9 mg/l; Total P: 0.5 mg/l. Iron: 5 mg/l
 2026 Design horizon – 26,250 PE
 Nereda – One third of the area and two thirds of whole life costs of conventional activated sludge

Site Layout
 Inlet Buffer
 Nereda Reactors
 Ferric Dosing
 Floc Tankc
 Mecana Cloth Filters

To left, not in view:
 Inlet channel; Inlet works (screens and grit removal); Storm returns pump station; Final effluent chamber

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