Nereda AGS operational optimisation experience; nitrogen, energy and effluent quality: PRESENTATION ONLY

Paul Lavender, Director Water Utilities (UK), Royal HaskoningDHV, UK


UK Lessons learned

Sizing in the UK is different

  • 95%ile compliance spot samples
  • Large transition from dry to wet weather conditions / underloading on Bio-P
  • Larger Influent Buffers for smaller sites (Originally 30% of reactor – now typically same size) N-1 – not required in Europe – (N-1+??)
  • Initial designs – heavy on instruments – gave wrong impression & added cost/complexity
  • Current designs streamlined
    Sludge Return Liquors
  • Balancing liquors can optimise design
    Chemical requirements – can operate chemical free but now recommend it as seat belt and for future-proofing. Tertiary Treatment – Often not needed. Final effluent typically comparable to long sludge age ASP when designing UV

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