Challenge

Rayleigh East WRc is a trickling filter works with a large expanse of grass plots to retain the solids discharged from nitrifying trickling filters, prior to UV disinfection.

Anglian Water approached ELIQUO HYDROK to deliver a compact, energy-efficient solution to eliminate the failing grass plots and high number of temporary treatment units employed to keep the site compliant.

Solution

ELIQUO HYDROK initially installed one SF15/75 filter with microfibre cloths, which allowed Anglian Water to experience the high performance of the technology first hand, prior to their completing the scheme with the planned second unit.

The units were installed within the gravity profile of the works for an ultra-low opex solution.

Key Figures

  • FFT: 179l/s,15534m3/d
  • TSS consent: 20 mg/l
  • Filter footprint: 23m2
  • Surface loading rate: 28.1m3/m2/hr
  • Return flows: 5.3%