Reading Sewage Treatment Works, Reading, United Kingdom
Key Data:
Design capacity PE
306,000 effluent, 346,000 sludge
Initial PE
284,000
Design peak flow
4,000L/sec
Peak instantaneous flow
3,490L/sec
Design maximum flow to treatment
1,805L/sec
Required maximum flow to treatment on commissioning
1,574L/sec
Inflow - ammonia-N:TKN ratio
Crude sewage - 60%; brewery waste - 22%
Inflow - inert solids:TSS ratio
Crude sewage - 15%; brewery waste - 81%
Inflow - COD fractions (crude sewage)
5% unbiodegradable and soluble, 13% unbiodegradable and particulate, 20% biodegradable and soluble
Inflow - COD fractions (brewery waste)
16% unbiodegradable and soluble, 54% biodegradable and soluble, 25% biodegradable and colloidal
Screening
6mm main inflow; 2mm brewery effluent
Biological nutrient removal
Modified 3-stage Bardenpho process, with additional prefermentation zone
Design phosphorous capture (on centrifuges)
75%
Ferric dosing requirement
At least 150kg/d as iron; not expected to exceed 300kg/d as iron (at anticipated loads)
Final effluent consents - BOD5
5mg/L
Final effluent consents - N-ammonia
2mg/L
Final effluent consents - TSS
30mg/L
Final effluent consents - total phosphorus
1mg/L (annual average limit)
Sludge - TDS
7-8%
Sludge - microbiological standards
Salmonella - nil; other pathogens - log6 reduction
Odour limits
<5 odour units (at site boundary)
Pumping station - pumps
5 x screw centrifugal impeller pumps
Pumping station - throughput capacity
500L/sec per pump
Pumping station - total discharge head
26m
Pumping station - electric motors
200kW premium efficiency motor
Project cost
£80 million
Project Timeline:
Initial design began
1998
Asset Management Plan 3 (AMP3) duration
2000-05
Site remediation began
January 2001
Detailed design phase
January 2001
Construction began
March 2002
Pumping station refurbishment commenced
March 2003
CEEQUAL Award of Excellence
9 September 2003
25% flow switched
22 March 2004
Full flow switched
May 2004
CHP system commissioned
May 2004
New EU discharge standards effective
From March 2005
IAS/OAS 'Best Bespoke Industrial Development' Award
13 October 2004
Official opening
18 January, 2005
Key Players:
Owners
Thames Water
Main contractor
Target Alliance (a partnership of Thames Water with the Black & Veatch / Taylor Woodrow JVC)
Biogas gas engines
Jenbacher
CHP O&M contractor
Clarke Energy UK
Odour control subcontractor
Alderley Systems
Odour control & desludging equipment
Chemviron; Gleeson
Optimisation software
Envirosim Associates
Pumping station refurbishment
Engenica (main contractor), Hidrostal (pumps), WEG Electric Motors (electric motors)
