Working towards a Carbon Neutral Utility Amsterdam. Roelof Kruize

Transcription

1 Working towards a Carbon Neutral Utility Amsterdam Roelof Kruize

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3 1. Climate policy of Amsterdam 2. Introduction to Waternet 3. Towards a circular economy 4. Examples of Energy Efficiency 3

4 Amsterdam green city 40% CO2 reduction in 2025 related to 1990 Reduction of 3100 k ton CO2/year 2,5% CO2 emission from the watercycle 4

5 Waternet The first water cycle company in The Netherlands Drinking water Waste water Groundwater Surface water 5

6 Watermanagement in Amsterdam and surroundings City of Amsterdam: - Sewerage - Ground water - Drinking water Waterboard Amstel, Gooi en Vecht: - Surface water management - Waste water treatment Waternet: - operational/administrative organisation 6

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8 Some key factors Annual budget 400 million Employees 1700 fte Customer costs 600 / year (2% average annual income) 8

9 Tariffs a 4 person household in 2013 in Amsterdam has to pay: Watermanagement tax: 93 Waste water treatment tax: 162 Drinking water fee: 235 Sewage-fee: Total watercosts: 639 (2% average annual income) 9

10 Advantages Watercycle Company 1. More efficiency 2. Better Customer Service 3. More innovations in sustainable solutions 10

11 Energy (2009) Consumption > drinking water MWh/yr (49%) > wastewater MWh/yr (42%) > watersystem 8000 MWh/yr ( 9%) Production (potential) > biogas/sludge MWh/yr 11

12 Towards a circular economy Ecological reasons (climate change, fast growing cities) Economical reason Political reason

13 Why now Club of Rome (1968) Our common future (Brundtland, 1987) Cradle to Cradle (Mc Donaugh, Bramgart, 2002) Inconvenient Truth (Al Gore, 2006) 1 Price of oil 2 Social Media

14 Power of Water in this transition Water is an important resource itself Water contains energy Water contains resources

15 Water stress

16 Energy in Water Thermal Energy Surface water Groundwater Drinking water Wastewater Chemical energy in wastewater

17 Example: making the water cycle climate neutral CO2 (Ktons/year) required compensation solar energy wind energy energy from the water cycle energy savings production of renewable energy residual CO2 emission purchase of renewable energy Year 17

18 office building cooling installation deep lake heat exchanger 18

19 Energy from the water cycle..heat from drinking water Drinking water temperature in distribution area (2006) frequency (% ) temperature ( o C) 19

20 Energy from the water cycle.heat from wastewater Warm waste water Warm clean water Cold clean water Sewerage 20

21 Energy from the water cycle.chemical energy from wastewater 21

22 Energy from the water cycle.thermal energy from groundwater Aquifer Thermal Energy Storage 22

23 district heating [ GJ/year] Combination with Waste Incineration Plant WasteWater wastewater treatment TreatmentPlant plant Waternet sludge Sludge [ ton/y] biogas Biogas [10 M Nm 3 /y] electricity Electricity [ MWh/y] heat Heat [ GJ/y] Waste Incineration waste incineration Plant plant AEB Avoided natural gas usage: 1,8 M m3/year Avoided greenhouse gas emissions: ton CO2- eq/year

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25 Biogas as transport fuel 60 company cars of Waternet

26 Cars on green gas Biogas 70% methane Upgrade to natural gas quality More than 10 million m 3 / year Possible upgrade to 30 million m 3 /year 26

27 Central Warming System from houses houses (12%) connected houses (2020) Integrated water management > drinking water > sewerage > warm water > cold water 27

28 Hoogovens? 28

29 Water and resources Waste water treatment plant has become a resource factory in 2020 Research in cycles Programme simular as the climate neutral programme

30 Some examples Struphite One-step filter New toilet paper Urine collection at Heineken Music Hall, Ziggo Dome, Ajax Bioplastics from sludge Production of nutriënts from waste

31 Struvite removal WWTP Amsterdam-West Solving operation problems leads to a market oportunity (NH 4 )MgPO 4.6(H 2 O) Improving dehydrating sludge Lower costs Higher energy production Waste to Energy Plant Less wear dehydrating sludge Lower costs maintenance Production 1000 ton P for fertilizer (3 ton/day)

32 Cellulose Dutch toilet paper consumpgon: 1 kg/person/month Sieve wwtp Blaricum ( pe) treats 30-80% of influent dried sievings 80% cellulose