presentation rwzi veluve apeldoorn
DESCRIPTION
Presentation Water company Veluve ApeldoornTRANSCRIPT
Ing. E.F.H. de ValkWaste and Energy
Wastewater treatment in the Netherlands“Development of energy efficient technology”
Program• Introduction• Organisation and tasks of the
waterboards• Wastewater treatment in the
Netherlands • Developments/Innovations
25 water boards Union of water boards(23 in 2012)
Tasks of the water board• Water system management (flood, quantity,
quality)• Treatment management (treatment of urban waste
water)• Main tasks: Protection against floods, water
management, water quality care and treatment of waste water
• Exemplary function water board: The way tasks are executed in the middle of society Collaboration!!!!
History of waste water treatment in the Netherlands (1)1900 -1970 :• Settling particle removal.• Cold sludge digestion1970 -1980 :• Introduction Water Pollution Act • Polluter Pays Principle• Construction of active sludge treatment plants• BOD and COD removal• Oxidation of nitrogen (N) (high energy
consumption)
History of waste water treatment in the Netherlands (2)1980-1990:• Attention for nutrients in surface water
(“P” en “N” removal from waste water)• Digestion: Sludge Biogas Energy Cost
Reduction1990-2005: • Stricter effluent quality requirements• Ongoing (biological) P and N removal• Rapidly increasing energy costs• Sense of urgency for energy efficiency improvement due
to climate change and cost reduction
History of waste water treatment in the Netherlands (3)2005-current:• Energy efficiency “HOT ITEM !!!”• Waste water is energy carrier• Long term agreement on energy efficiency (2008)• Ongoing R&D of energy efficient waste water
treatment technology• Waste water treatment plants are energy factories• Raw material recovery from waste water• Ongoing cooperation between water boards and
between water boards and private companies
Examples of new developments / technology• NEREDA (aerobic granulate sludge technology)• DEMON (N removal from return liquors)• Automatic Backwash Filter (energy efficient sand filter)• P and N removal• High pressure active sludge hydrolysation • UWWT as Energy Factory
But also developments on sludge treatment, odor treatment and noise reduction
Technical Innovations Nereda (Urban Waste Water Treatment Epe, the
Netherlands)
Realisation of a Nereda installation at the WWTP Epe
-/- 30% !!!
Water board Veluwe is building the wastewater treatment plant of the future
Less energie use, cleaner water
History in a nutshell• 1993: TUD research• 1998: DHV/TUD collaboration• 2000: feasibility study• 2002: stable granule formation on labscale• 2003: STOWA (Foundation for organizational water
management) pilot research at WWTP Ede• 2005: Vernufteling 2005 (prestigious price for
engineering) and introduction of Nereda• 2005: pilot study WWTP Aalsmeer• 2006: pilot study WWTP Epe• 2006: start research in collaboration with STOWA
and 5 district water boards• 2007: study at WWTP Hoensbroek• 2008: pilot study at WWTP Dinxperlo• 2009: realisation of 1rst full scale Nereda installation in Epe
Innovations/operational activities at district waterboard Veluwe (technical)Nereda (Urban Waste Water Treatment Epe, the Netherlands) Demon (Part stream treatment of nitrogen at WWTP
Apeldoorn)
Demon: part stream treatment installation (Nitrogen removal)
60 % less energy use
Innovations/operational activities at district water board Veluwe (technical)Nereda (Urban Waste Water Treatment Epe, the
Netherlands) Demon (Part stream treatment of nitrogen at WWTP
Apeldoorn)Automatic Back wash Filter (WWTP Harderwijk)
Automatic Back wash Filter (ABWF)
Seriously take energy into account when assessing tenders for projects (EMVI)
Innovations/operational activities at district waterboard Veluwe (technical)Nereda (Urban Waste Water Treatment Epe, the
Netherlands) Demon (Return Liquor treatment of nitrogen at WWTP
Apeldoorn)Automatic Backwash Filter (WWTP Harderwijk)Energy production from waste streams
(several WWTP’s)Supply of energy (electricity and heat)
Energy production at WWTP Apeldoorn
Collaboration between public and private parties
Unique opportunity
Result: a special Project
Sewage waterEffluent
hot water 70oC
return water 40 oC
Bio gasAuxili
ary
boiler
Explanation of the system
Digester
Potable water
Production of Heat and Electricity WWTP Apeldoorn
5,500,000 m3 biogas per
year
PRODUCTION OWN USE
ELECTRICAL16,000,000 kWh/year 9,000,000
kWh/yearTHERMAL56,500 GJ 16,000 GJ
Year duration curve of Zuidbroek
prognose jaarbelasting bij n=1.100
-
1.000
2.000
3.000
4.000
5.000
6.000
7.000
januari
februari
maart ap
ril mei
juni
juli
augustus
september
oktober
november
december
GJ
prod
uctie
per
maa
nd
Innovations/operational activities at district waterboard Veluwe (technical)Nereda (Urban Waste Water Treatment Epe, the
Netherlands) Demon (Return Liquor treatment of nitrogen at WWTP
Apeldoorn)Automatic Backwash Filter (WWTP Harderwijk)Energy production from waste streams
(several WWTP’s)Supply of energy (electricity and heat)Thermal hydrolysis of sludge
Thermal hydrolysis of sludge
• Thermo-druk-hydrolyse– Temperature and pressure
treatment– Improving organic matter
degradation– Applyed to secondary
sludge• Two kinds:
– batch (Cambi)– continue (Sustec)
Thermal hydrolysis of sludge
Innovations/operational activities at district water board Veluwe (technical)Nereda (WWTP Epe) Demon (Part stream treatment of Nitrogen at WWTP
Apeldoorn)Automatic Backwash Filter (WWTP Harderwijk)Energy production from waste streams
(several WWTP’s)Supply of energy (electricity and heat)Thermal hydrolysis of sludgeRegaining raw materials (Phosphorus WWTP
Apeldoorn)
P recovery from centrate
• Up to: 95% P recovery• 99% pure and
sustainable product: Struviet
Energy efficient UWWT = Reality