Boris Lesjean Veolia Germany ISEC, , Graz

Transcription

1 YOUR FLUSH, OUR ENERGY FULL SCALE DEMONSTRATION OF ENERGY POSITIVE SEWAGE TREATMENT PLANT CONCEPTS TOWARDS MARKET PENETRATION Boris Lesjean Veolia Germany ISEC, , Graz Funded by the Horizon 2020 Framework Programme of the European Union Grant agreement No

2 Energy from municipal wastewater: an overview of best practices in Europe Boris Lesjean, Veolia Germany ISEC, , Graz

3 Current situation In 2016, sewage sludge biogas = 8.6% of total EU biogas production so what???

4 Content 1. Introduction on PowerStep project 2. Market potential and first users

5 Content 1. Introduction on PowerStep project 2. Market potential and first users

6 WWTPs are the highest energy consumer in a municipality! 6

7 WWTP the Energy consumer 7

8 BUT WWTPs try to improve themselves! 8

9 Energy-positive WWTP a DREAM? Is there a potential by treating your Pooh to become energy-neutral or energy-positive as WWTP? (without using external renewable sources) Are energy-positive WWTPs without external renewable sources still a DREAM? 9

10 We as a consortium say NO it s no dream, energy-positive WWTPs are possible! 10

11 Less aeration 175 kwh/pe*a 4 kwh/m³ (120 g COD/pe*d, 120 L/pe*d, 1000 mg/l COD) 105 kwh/pe*a 2.4 kwh/m³ More biogas 53 kwh/pe*a 1.2 kwh/m³ 42 kwh/pe*a 0.96 kwh/m³ 17 kwh/pe*a Waste heat 17 kwh/pe*a 0.38 kwh/m³ Theoretical energy potential in wastewater organics WWTP: 60% of COD in sewage sludge Digestor: 50% of COD into biogas Methane yield: 320 L CH 4 /kg COD CHP plant: 40% electrical efficiency 11

12 The POWERSTEP concept 12

13 The POWERSTEP case studies 13

14 Results within Awareness Impact level Technology level 14

15 Results within POWERSTEP Awareness 15

16 Content 1. Introduction on PowerStep project 2. Market potential and first users

17 Front runners (extracts from web) Hamburg, D Vienna, AT Aarhus, DK Bottrop, D 17

18 % WWTP 2017: statistics of German Water Association ~ 25 WWTPs < 100,000 p.e. ~ 15 WWTPs > 100,000 p.e. TOTAL ~ 40 WWTPs > 100% self supply In Germany* * Including wind, sun, industrial wastewater, cosubstrates, heat pumps etc Degree of self supply (electricity) in % 18

19 The German pioneer: Grevesmühlen WWTP (65,000 p.e.) Energy positive since : Outing!!! Today: > 300% self electricity supply (handling sludge from 120,000 p.e.) Energy neutrality for full utility 19

20 specific electricity consumption & production in kwh/pe(cod) a) Kubratovo WWTP (Sofia, 1.3 M p.e.) Activated sludge + digestion (TN out =10mg/L) Underloaded, no external carbon source (C/N ~ 10) ,8 20,2 18,4 18, ,2-28, ,3-23,2-30 Kubratovo WWTP 2016 OCEAN 2016 OCEAN stateof-the-art OCEAN Powerstep Self-sufficiency 112% 115% 126% 150%

21 Marselisborg WWTP, Denmark (200,000 p.e.) State-of-the-art WWTP with simultaneous N/DN and side stream deammonificatin Favorable C/N > 12 but no external carbon source: up to 153% self sufficiency! 22

22 Copenhagen, 2017 > 150% energy supply and carbon neutral (3 WWTPs, 1,400,000 p.e.) No cosubstrate Digestion + incineration Biogas in town gas grid Heat and power sales 24

23 Perpignan (350,000 p.e.) Heat pumps and biogas to gas grid Gazomètre Digesteur 62% CH 4 Réseau gaz naturel Épuration biogaz Poste d injection biométhane Chauffage du digesteur via PAC Energido Start mid 2018 Heat pump capacity: 400 kw Biogaz : up to187 Nm 3 /h Biomethane : up to 95 Nm 3 /h Avoided CO 2 emission: ~ 900 tonnes CO 2 eq/an 25

24 Stockholm: biogas feeds buses External Organic Material (EOM) Oil/fat separator sludge tonnes/year Glycerol tonnes/year Upgrading facility: 14 MNm 3 vehicle fuel/year Operated by Scandinavian Biogas Biogas bus Public transport Wastewater Bromma WWTP PE Henriksdal WWTP PE EOM vehicle fuel Stockholm ww treated ww heat heat Henriksdal and Bromma WWTP: 22 MNm 3 biogas/year Biogas production (60% CH4) since 1934 from digestion of WW-sludge and co-digestion of EOM (only at Henriksdal) Hammarbyverket/Solnaverket: ~1,3 TWh/year Heat recovery from WW for municipal district heating. Owned and operated by Stockholm Exergi and Norrenergi 26

25 Bristol s Poo Buses (2015) 27

26 Kakolanmäki WWTP, Turku, Finland: Energy recovery with heat pumps 300,000 p.e. WWTP underground Heat pumps on treated effluent (DT 5-10 C) Coefficient of performance COP=~3,9 Energy Balance times more energy produced than needed Energy consumption Electricity District Heating Fuel Total Energy production Digestion (net) Heat recovery ventilation Heat pump district heating (net) Heat pump district cooling (net) Total MWh 540 MWh 20 MWh MWh MWh MWh MWh MWh MWh Synergy wastewater / heat utilities: WWTP supplies 14% of Turku region district heating and all the district cooling! 28

27 Gas yield per capita and Member State 29

28 Market potential Annual Net Electricity EU27 (WWTPs > 10,000 p.e.) Net electricity (electricity generation electricity demand): Status Quo Benchmark PowerStep I PowerStep II Selfsufficiency for electricity Electricity production increases and electricity consumption decreases with PowerStep technologies leading to a net gain of 16 TWh/a. 30

29 Market potential Annual OPEX EU27 (WWTPs > 10,000 p.e.) Status Quo Benchmark PowerStep I PowerStep II The OPEX of PowerStep technologies are lower than the current status quo costs (1.5 bn /a). 31

30 Market potential Annual CO2-eq Emissions EU27 (WWTPs > 10,000 p.e.) Status Quo Benchmark PowerStep I PowerStep II Warning: N 2 O emission PowerStep decreases power related CO2 Emissions by up to 40%. 32

31 Potential of sewage biogas in EU Today: TJ/a of sewage gas Potential with PowerStep: TJ/a > 3x increase (at constant cost)

32 Take home messages Self-sufficient WWTP is reality today! 1 Many examples in Europe with State-of-the-Art technologies 2 Many concepts of energy recovery and biogas valorisation 3 Significant market potential and impact no regret measure 4 Innovation to further push the limits and extract potential 34

33 your flush = your energy 35

34 Credit (front runners projects) Alphabetical order by family name Sofia Andersson, Stockholm Vatten Eckhard Bomball, Zweckverband Grevesmühlen Vincent Chevalier, Veolia Eau France Cazalet Damien, Veolia Germany Célia Devinoy, Veolia Environnement SA Anders Finnson, Svenskt Vatten Mirva Levomäki, Turun seudun puhdistamo Oy Sylvie Novak, Veolia Eau France Per Overgaard Pedersen, Aarhus Vand Christian Remy, Berlin Centre of Competence for Water Christophe Sardet, Veolia Germany Risto Saarinen, Porvoon vesi Ole Steensberg Øgelund, vand og affald Dines Thornberg, BioFos 36

35 Special THANKS to PowerStep partners that supplied slides to the presentation Christian Loderer, KompetenzZentrum Wasser Berlin (project coordinator) Christian Remy, KompetenzZentrum Wasser Berlin 37

36 Acknowledgement POWERSTEP is an innovation action project supported by the European Union under the Horizon 2020 Framework Programme. Contract no Duration: 1/07/15 30/06/18 38

37 YOUR FLUSH, OUR ENERGY FULL SCALE DEMONSTRATION OF ENERGY POSITIVE SEWAGE TREATMENT PLANT CONCEPTS TOWARDS MARKET PENETRATION Boris Lesjean Veolia Germany Funded by the Horizon 2020 Framework Programme of the European Union Grant agreement No