Ochre Volume Minimisation Matt Dey or Ochre Concentration The School of Engineering.

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Presentation transcript:

Ochre Volume Minimisation Matt Dey or Ochre Concentration The School of Engineering

The Team Keith Williams Fred Pooley Liyuan Liang Devin Sapsford Chris Bullen Andrew Barnes

Active Treatment Industrial Partners

Neutralisation reactor Effluent Clarifier/Thickener Mixer/Aerator Neutralisation reagent Clean water Solids Standard chemical precipitation

Chemical precipitation

Neutralisation reactor Effluent Clarifier/Thickener Recirculated solids Neutralisation reagent Solids Floc reactor Flocculant reagent HDS

Bench tests

Different neutralisation reagents Ca(OH) 2

Different neutralisation reagents NaOH

Different neutralisation reagents Mg(OH) 2

Shear

Pilot Plant First stage reactor Second stage reactor Flocculation

Active Plant Horden

Passive Treatment Partners

Canal Worsley Delph & Bridgewater Canal Influent Pump Bed of sandEffluent

Results Flow rate (l/hr) IronRetention Time (Hrs) Approximate Operating Time * Total (mg/l)% Removed % 95% 94% hrs 96hrs 72hrs

Taff Merthyr IBC design Influent Effluent Bed of pea gravel

Results Feed rate (L/min) Average % removed Retention time (hrs) % % % % %1.4

EPSRC Funded Research Approximately 6 x 4m tank, 2m deep Up to 4l/s (14.4m 3 /hr) flowrate 3 years in the field operation Optimise ochre accretion/filtration Under drainage to aid in ochre thickening

Will it work? Palenna

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