Henry van Veldhuizen
Amersfoort, 2014
Vallei en
Veluwe
Waterschap Vallei en Veluwe
244. 833 ha
1.082.000 inhabitants
16 wwtp’s
1.471.00 p.e.
WWTP Amersfoort (300.000 p.e.)
Presentation
•
History
– Vision Energy and Resources
– Energy Measures WWTP Amersfoort
– Research Omzet.Amersfoort
– Project Omzet.Amersfoort
•
2013: Procurement Omzet.Amersfoort phase 1 en 2
•
Future: Phase 3 Sludge drying
Vision Energy and Resources
(international) coöperation
innovation!
Knowledge exchange
energy
Waste
water
Ambition
(2010)
Clean
water
Sludge
sand
nutrients
Paper fibers/
cellulose
Fuel
Raw
Materials
Measures wwtp Amersfoort
•
2010
•
2012
•
2011
•
2012
10.000.000
Introduction sand filter
kWh/y
8.000.000
6.000.000
Introduction bubble aeration
4.000.000
Biogas filtration with activated carbon
2.000.000
DEMON
2005
2006
2007
2008
2009
2010
2011
totaal verbruik elektriciteit
elektriciteit voor beluchting
elektriciteit door gasmotor
inkoop van elektriciteit
2012
Research Omzet.Amersfoort (2010)
Results:
2
Central
Digestion
8
3
Sudge sale
PE dosing
1
Omzet.
7
4
Amersfoort
CHP study
6
P-recovery
Sludge pretreatment
•
Central digestion + Thermal
Pressure Hydrolysis
•
No PE dosing (effluent
quality)
•
Bio-P en P-recovery
•
Sludge drying: 75% feasible,
but many risc’s
•
CHP, no ORC
5
Sludge
drying
Project Omzet.Amersfoort (2010)
•
Proposal: Three Phases:
1. Central digestion + Thermal
Hydrolysis
2. Bio-P en P-recovery
3. Sludge drying with excess heat
•
LIFE+ subsidy:
• Realisation innovative aspects
(TPH, P, sludge drying)
• Monitoring results
• Knowledge sharing
Project Omzet.Amersfoort
•
Expected results:
– Phase 1: Energy:
• Amersfoort Energy Neutral
• Region 65% self sufficient
• Heat: dependent on process
• Sludge: 30% d.w.
• ROI: 6 years
– Phase 2: Phosphate:
• 40% recovery of total phosphate region
• Chemical usage: Reduction 50%
– Phase 3: Sludge drying
• Sludge: 90% d.w. for 75% of the sludge
• ROI 7 years
2013: Procurement
•
Procurement of Phase 1 and 2 at once
•
Selection: SH+E
• TPH: Stulz – Lysotherm :
• P recovery with Wasstrip and Pearl
Result Procurement
– Phase 1 and 2: Energy en Phosphate:
• Amersfoort Energy neutral
• Surplus: 2 M kWh/jaar
• Region 65% self sufficient
• Heat: dependent on process
• 40% recovery of total phosphate region
• Chemical usage: Reduction 50%
• Sludge: 30% d.w.
• ROI: 6 years
130%
70%
maximum
42%
31%
6,7 jaar
Process according to procurement
Amersfoort
PST
AT
SST
DEMON
CHP
pearl
Thick.
Thick.
strip
Thickener
DT
Buffer
Dew.
Woudenberg
TPH
sec. sludge
Nijkerk
prim. sludge
CHP
Digestion Tank (DT)
sec. sludge
Soest
CHP
prim. sludge
DT
sec. sludge
Silo
Final
treatment
The movie ...
Future: Phase 3 – sludge drying
•
•
•
•
•
Sludge drying with excess heat
Project not possible on WWTP Amersfoort with project period
Choice: pilot/demo with 10% on wwtp Ede: 200 kWth
Period: 2014-2016
Interpretation of results for WWTP Amersfoort in 2015
Everything clear…
more information:
www.omzetpuntamersfoort.nl/english