Sustainable Sanitation. case: Noorderhoek. Ir. Brendo Meulman

Transcription

1 Sustainable Sanitation case: Noorderhoek Ir. Brendo Meulman

2 Content Noorderhoek the project Noorderhoek research and evaluation Noorderhoek results Other projects

3 DeSaH B.V. Sustainable and innovative (C2C) Sanitation Leading Founded in 2005 mainly active in The Netherlands, but willing to expand

4 DeSaH B.V. Consultancy Engineering Contracting Operation & Maintenance

5 Partners Noorderhoek Housing cooperation Elkien Waterboard Fryslan Municipality Sudwest Fryslan STOWA DeSaH

6 The project Projection: 230 new built houses from 2008 in 4 years Projection: 600 inhabitants in total 1st phase (2011) 62 appartments, 79P.E. 1st phase all inhabitants >60 years Separation BP10 of black and grey water Collection of VF waste byvacuumshredders Extensive evaluation period nd phase (2014) 45 houses In 2015 there are 170 PE connected

7 The project

8 The project Sustainable sanitation based on: No risks for (human) health maximum energy recovery Phosphate recovery minimal BP9 water usage, no water reuse Minimal non reusable/harmful by products Easy to use and well accepted

9 Schematic overview 7% 93%

10 Detailed scheme Conversion of organics to biogas Biogas for heating Recovery of phosphate Energy efficient removal of nitriogen Treatment / polish of grey and black water Heat recovery

11 How does it look

12 Research and evaluation Goals Evaluation effectiviness concept Insight in concept Sustainable Sanitation Options for improvement and upscaling Approach 7 research topics Comparison with reference

13 Research and evaluation Performance system Operation and Social maintenance 0acceptance Energy Financial analyses X Micropollutants Sustainability

14 Research and evaluation Reference Central system p.e. N, P-removal, sludge digestion Reference sewer: mixed Functional parameter: per inhab.year Noorderhoek Corrected for loading rates

15 Performance Results System functions well, although total load is 14% of design load Watersaving ca 35%

16 Water saving Waterverbruik (l/p/d) totaal zwart grijs 20 0 Nederland (gemiddeld) Waterschoon Lemmerweg Oost Watersaving Waterschoon compared to Dutch average is 30% Waterusage of prototype vacuum kitchen grinder is ca. 7L/ie*d

17 Performance Results System functions well, although too low loading Watersaving ca 30% Discharge limits (mg/l)

18 Results effluent Parameter Eenh eid Waterschoo n Effluent Lemmerweg Oost Lozingseis Rem % CZV t mg.l 1 62, % CZV f mg.l 1 63,2 92,7 CZV SS * mg.l 1 15,3 CZV c * mg.l 1 26,8 CZV o mg.l 1 50,5 65,9 N t mg.l 1 4,17 9, % NH 4 N mg.l 1 1,04 0,87 NO 3 N mg.l 1 0 0,6 NO 2 N mg.l 1 0 0,07 P t mg.l 1 8,66 1,7 2 68% PO 4 P mg.l 1 7,89 1,18 Cationic surfactans mg.l 1 0,19 0,22 Anion surfactans mg.l 1 1,88 6,64 Non ionic surfactans mg.l 1 0,72 2,26

19 Performance Results System functions well, although too low loading Watersaving ca 30% Discharge limits (mg/l) Sludge quality: Cu en Zn too high

20 Heavy metals in sludge Parameter Dimension Standards for manure Waterschoon Sludge UASB Lemmerweg Oost Sludge WWTP Sludge UASB 1 Sludge UASB 2 DS % As mg/kg DS <10 <10 16,0 Cd mg/kg DS Cr mg/kg DS 75 16, ,3 Cu mg/kg DS , Hg mg/kg DS , ,04 Ni mg/kg DS 30 15, ,5 Pb mg/kg DS , Zn mg/kg DS

21 Heavy metals in sludge Parameter Dimension Waterschoon Sludge UASB Lemmerweg Oost Cow manure (van Dooren et al., 2005) P fertilizer (Remy en Ruhland, 2006) Sludge Sludge UASB UASB 1 2 As mg/kg P 93 <200 < Cd mg/kg P Cr mg/kg P Cu mg/kg P Hg mg/kg P 9, Ni mg/kg P Pb mg/kg P Zn mg/kg P

22 Performance Results System functions well, although too low loading Watersaving ca 30% Discharge limits (mg/l) Sludge quality: Cu en Zn too high Optimizations possible

23 Conclusion performance Based on the results there has been calculated that current installtion can handle P.E This is 25x more than connected during the research period In the other research topics the assumption has been made that P.E were connected. This doens t mean that the ideal scale is P.E!! Several optimizations possible, a few have been included in the other research topics based on expert judgement

24 Optimizations Higher loading Other type of struvite reactor Heat recovery from black water Design of greywater sewer Less waterusage vacuum kitchen grinder Sludge storage, higher DM-content and less transport

25 Operation and maintenance Results Well controlable No major issues: small problems; all solved Do s and don ts No bucket with cleaning water in the toilet No chlorine cleaning agents Vacuumsewer demands specific knowledge

26 Energy Results kwh/p.e.y reference Noorderhoek (optimized) Biogasproduction Chemical 60,6 148,2 Heat demand Thermal 5,5 50,0 Heat production Thermal 30,3 476,8 Heat pump Electricity 0,0 105,6 Electricity wwtp Electricity 30,0 20,8 Electricity production Electricity 22,4 0,0 Electricity transport Electricity 28,1 29,9 Total gas Chemical 0 148,2 Total electricity Electricity 33,8 156,2 Total heat Thermal 0 426,8 Totaal primair primair 87,7 184,4

27 Financial analysis Results Samenvatting Onderdeel Totaal Totaal per inwoner aandeel Eigenaar Investeringen - Inzamelsysteem EURO 33% Gemeente - Meerkosten sanitair en binnenhuisriolering EURO 32% Woningstichting / realisator - Zuivering EURO 36% Woningstichting / realisator Totaal investeringen EURO 100% Afschrijvingen - Inzamelsysteem ,99 EURO/jaar 23% Gemeente - Meerkosten sanitair en binnenhuisriolering ,83 EURO/jaar 33% Woningstichting / realisator - Zuivering ,92 EURO/jaar 44% Woningstichting / realisator Totaal afschrijvingen ,75 EURO/jaar 100% Onderhoud / exploitatie / besparingen - Inzamelsysteem ,98 EURO/jaar 46% Gemeente - Meerkosten sanitair en binnenhuisriolering - - EURO/jaar - Woningstichting / realisator - Zuivering ,05 EURO/jaar 1045% Woningstichting / realisator - Besparingen ,52 EURO/jaar -991% Bewoners / gemeente Totaal onderhoud / exploitatie / besparingen ,51 EURO 100% - Inzamelsysteem ,97 EURO/jaar 25% - Meerkosten sanitair en binnenhuisriolering ,83 EURO/jaar 30% - Zuivering ,98 EURO/jaar 134% - Besparingen ,52 EURO/jaar -89% Totaal jaarlijkse kosten ,26 EURO/jaar 100% Total costs of exploitation (depreciation and savings included) for the source separated system Noorderhoek in a housing estate with 1200 inwoners, are EUR a year. This is EUR 72 per inhabitant/year.

28 Financial analysis Results Totaal Investering Afschrijving Exploitatie Totaal aandeel (EUR) (EUR/jaar) (EUR/jaar) (EUR/jaar) in totaal Inzamelsysteem DWA-riolering % perceelsaansluitingen % gemaal, nat met capaciteit 9 m³/h bouwkundig % - mechanisch / electrisch % - persleiding (2 km) % subtotaal inzamelsysteem % Zuivering Kosten RWZI* % TOTAAL Samenvatting aandeel Onderdeel Totaal Totaal per inwoner in totaal Investering inzamelsysteem EURO Investering RWZI - - EURO Afschrijving inzamelsysteem ,19 EURO/jaar 26% Onderhoud inzamelsysteem ,21 EURO/jaar 2% Totale RWZI-kosten ,50 EURO/jaar 72% Totaal jaarlijkse kosten ,90 EURO/jaar The source separated system at the investigated scale of 1200 inhabitants is circa 11 % more expensive than the reference at a scale of PE. If the source separated system would be upscaled to inhabitants it becomes cheaper than the reference (same accountants for downscaling the reference to )

29 Sustainability Results Mass balance of carbon

30 Results Black water, COD balance CZVt vracht per ie (g d 1 ie 1) influent biogas UASB slib OLAND slib struviet effluent

31 Results Grey water, temperature Temperatuur ( C) T = 12,5 oc BU01 (TT08) b trap (TT04) Datum (dd mm jj)

32 Sustainability Results Mass balance of carbon Mass balance of phosphorous

33 Results Black water, P balance 1,8 1,6 1,4 Pt vracht per ie (g d 1 ie 1) 1,2 1,0 0,8 0,6 0,4 0,2 0,0 influent biogas UASB slib OLAND slib struviet effluent

34 Overall conclusions Technically the system operates very well A lot of valuable knowledge has been gathered Optimization have been defined that can be implemented in the follow up of Noorderhoek or in other future installations The reference is slightly performing better on costs but by increasing the amount of P.E to the source separated system outperformes the reference A net energy producing wwtp is possible, including resource recovery and very high removal efficiencies

35 DeSaR pilot Sneek

36 Schematic, Ukrain

37 Schematic, NIOO

38 Schematic, Villa Flora

39 Future projects Ministery of I&E, new officie building with employees in The Haque Buiksloterham (?), Amsterdam, 1000 houses Kreekrijk (?), Zaanstad, 900 houses Almere (?), 900 houses Helsingborg (?), 350 houses Gent

40 Decentral Urban Wastewater Treatment with Energy and Nutrient recovery > 400 dwellings + school/kindergarten/sports facility South 200 units 2018 Central + public functions 110 units 2016 North 125 units 2016 Schipperskaai Ghent DuCoop cooperative

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42 DUWTEN recovering energy, water and nutrients Gray water: m³/j Waste temperature after sanitation: 25 C HP production 700 MWh th > m³ water re used as industrial process water Black water: m³/j CHP: 112 MWh th and 50 MWh el 11 ton silt/j To be burned Nutrients 1,5 ton struvite/j Used in urban agriculture

43 1/3 of heat demand produced from waste streams Black water Combined Heat & power Gray water Heat pump

44 Business model Shareholder structure :