Henry van Veldhuizen

Amersfoort, 2014

Vallei enVeluwe

244. 833 ha

1.082.000 inhabitants

16 wwtp’s

1.471.00 p.e.

Waterschap Vallei en Veluwe

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

Ambition(2010)

(international) coöperation innovation! Knowledge exchange

Wastewater

sand nutrientsPaper fibers/ cellulose

SludgeFuel

energy

Clean water

Vision Energy and Resources

Raw Materials

Measures wwtp Amersfoort

• 2010

• 2012

• 2011

• 2012

-

2.000.000

4.000.000

6.000.000

8.000.000

10.000.000

2005 2006 2007 2008 2009 2010 2011 2012

kWh/y

totaal verbruik elektriciteit elektriciteit voor beluchting

elektriciteit door gasmotor inkoop van elektriciteit

Biogas filtration with activated carbon

Introduction bubble aeration

Introduction sand filter

DEMON

Research Omzet.Amersfoort (2010)

1 Omzet.

Amersfoort

2Central

Digestion

3PE dosing

4Sludge pre-treatment

5Sludge drying

6P-recovery

7 CHP study

8Sudge sale

Results:

• 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

Project Omzet.Amersfoort (2010)

• Proposal: Three Phases:1. Central digestion + Thermal

Hydrolysis2. Bio-P en P-recovery3. 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 130%• Surplus: 2 M kWh/jaar • Region 65% self sufficient 70%• Heat: dependent on process maximum• 40% recovery of total phosphate region 42%• Chemical usage: Reduction 50%• Sludge: 30% d.w. 31%• ROI: 6 years 6,7 jaar

Thickener

Process according to procurement

DT

ATPST SST

Amersfoort

Woudenberg

Thick.

Dew.

sec. sludge

Thick.

CHP DEMON

strip

pearl

Nijkerk

sec. sludge

Soest

prim. sludge

sec. sludge

prim. sludge Digestion Tank (DT)

TPH

Buffer

Final treatment

Silo

CHP

CHP

DT

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