Bristol (Avonmouth), wessex water case study


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Plant inputs : 30,660 Tonnes dry solids/annum Primary sludge 70% Secondary sludge 30%
Advanced Digestion plant : Monsal EH - High rate hydrolysis Heating technology - water - from CHP 6 x 2,728m3  Mesophilic digesters (16,368m3  total)
Biogas and Bioenergy engineering : Over 33,000m3 /day or 425m3  biogas generated/tonne DS treated 3 x 1.15 MWe CHP dedicated to biogas Siloxane removal CHP - Heat recovery

Key Benefits

  • Sludge throughput increased lo 84 Tonnes/day
  • No additional digestion volume required (loading over 4Kg vS/m3.d)
  • Cost of liming significantly reduced
  • Renewable energy production optimised • 3MWe generated
  • No supplementary fuel required
  • No additional liquor treatment plant required for MonsalEH
  • Wessex Water's largest sludge supercentre optimised

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