Sustainable Sanitation case: Noorderhoek€¦ · groenwater biogas vergister Grijswater behandeling...
Transcript of Sustainable Sanitation case: Noorderhoek€¦ · groenwater biogas vergister Grijswater behandeling...
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Ir. Brendo Meulman
Sustainable Sanitation
case: Noorderhoek
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Consultancy firm, founded in 2005
Sustainable and innovative (C2C) Sanitation
Leading
7 employees
DeSaH B.V.
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DeSaH B.V.
Consultancy
Engineering
Contracting
Operation & Maintenance
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Clearing your mind…..
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Some history……….(communication)
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Also downside effects……
Law of the handicap of a head start: Investments became useless
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Energy has same examples
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Energy has same examples
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Future: less is more
Innovation is going faster and faster, investments with long depreciation times have large financial risks
Demographic changes are difficult to foresee, investments in large scale, centralised technology has large financial risks
Sustainability gets increased attention, people want to be more independent and self supporting
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Why would sanitation not follow?
<1850
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Why would sanitation not follow?
1850-1960
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Why would sanitation not follow?
1850-1920
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Why would sanitation not follow?
1920-1960
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Why would sanitation not follow?
1850-1960
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Why would sanitation not follow?
1960-2012
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Innovation of Sanitation
Sanitation moved from local to decentral, to central.
The collection of human waste is hardly innovated in more than 200 years
The transport of human waste innovated from defecation into canals, to transportation by lorry towards transportation by tubes
Treatment of human waste innovated from no treatment, towards reuse in agriculture, towards relative clean water production but also formation of polluted by-products
Contrary to innovation in f.i. communication and energy sanitation became less indivual, less sustainable and more large scale.
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How can this be changed?
Collection, transport and treatment of organic residues based on:
Creating value out of the residues
Synergy with the surrounding environment
Using existing infrastructure if possible
Source-oriented approach
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Closing loops
Energy loop
Nutrient loop
Water loop
Whether a compound is defined as waste or as resource is greatly depending on the concentration
Obtaining value out of waste
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In stead of using WasteWaterTreatmentPlants, we
introduce the
RESOURCE MANAGEMENT SYSTEM (RMS)
What is Sustainable Sanitation?
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Resource Management
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Black water (toilet water): Difficult degradable organic material High nutrient concentration Hormones and medicine traces
Grey water Easily degradable organic material High temperature Heavy metals (below irrigation standards) Low salt concentration (irrigation)
Separation at Source
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Nitrogen
Organic material (energy)
Phosphorous
Characterization of wastewater flows
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Vacuum sewer
Collected biowaste, faces and urine are treated together in an anaerobic biogas system
Effluent is treated aerobic and physical/chemical to remove/recover nutrients, discharge to surface
water
Separate collection sewer
Treated (an)aerobic
Discharge to surface water
Separate collection sewer
Discharge to surface water
Solid biowaste
Faeces
Urine
Greywater
Rainwater
Schematic overview of DeSaR
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Schematic overview
7% 93%
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zwartwater
grijswater
groenwater
biogas
vergister
Grijswater
behandeling
geavanceerde oxidatie
lozing
oppervlakte water
OLAND
(stikstofverwijdering)
struviet reactor
magnesium
Schematic overview
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Water savings
0
20
40
60
80
100
120
140
Nederland (gemiddeld) Waterschoon Lemmerweg-Oost
Wat
erve
rbru
ik (l
/p/d
)
totaal
zwart
grijs
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Results Black water, COD balance
-20
0
20
40
60
80
100
120
140
160
influent biogas UASB slib OLAND slib struviet effluent
CZV
t vr
ach
t per
ie (g
d-1
ie-1
)
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Results Black water, N balance
0
2
4
6
8
10
12
14
16
18
influent biogas UASB slib OLAND slib struviet effluent
N v
rach
t p
er
ie (g
d-1
ie-1
)
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Results Black water, P balance
0,0
0,2
0,4
0,6
0,8
1,0
1,2
1,4
1,6
1,8
influent biogas UASB slib OLAND slib struviet effluent
Pt
vrac
ht
per
ie (g
d-1
ie-1
)
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Schematic overview RMS
7% 93%
C: 65%
C: 15% N: 5% P: 35%
C: 20% N: 95% P: 65%
N: 10% P: 60%
N: 5% P: 55%
N: 5% P: 5%
C: 100% N: 100% P: 100%
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0
5
10
15
20
25
30
20-08-11 17-01-12 15-06-12 12-11-12 11-04-13 08-09-13
Tem
pe
ratu
ur
(°C
)
Datum (dd-mm-jj) BU01 (TT08) b-trap (TT04)
∆T = 12,5 oC
Results Grey water, temperature
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Schematic, Noorderhoek
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Advantages RMS
Energy production
Water saving of at least 25%
Treatment of wastewater and organic waste
Closing energy and nutrient loop Removal of micro pollutants
No harmful by-products
Very high removal efficiencies for COD and nitrogen
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Challenges RMS
removal efficiency of phosphorous within grey water
sludge production by a-trap
concentration blackwater influent
legal status of digestate and struvite Removal of micro pollutants