Assainissement - Enjeux, Stratégies, Perspectives Erich J. Shaw – P.E. September 29, 2011 “SUNRISE” – Smart City Demonstration Model - - “Smart Urban Networks for Resilient Infrastructure & Sustainable Ecosystems” - Cité Modèle des Réseaux Intelligents - le Partenariat pour l’Innovation Urbaine - University of Lille, LGCE & W-SMART Research Center
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Assainissement - Enjeux, Stratégies,
Perspectives
Erich J. Shaw – P.E. September 29, 2011
“SUNRISE” – Smart City Demonstration Model - - “Smart Urban Networks for Resilient Infrastructure & Sustainable Ecosystems” -
Cité Modèle des Réseaux Intelligents - le Partenariat pour l’Innovation Urbaine -
University of Lille, LGCE & W-SMART Research Center
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Challenges
Challenge 1 – Higher Treatment Reliability at the WWTP
As clean water sources get scarcer, water reuse from wastewater is recognized as a sustainable method for additional water supply.
Reuse water quality requirements have increased which has in turn challenges reliability issues for wastewater treatment plants
less than 100100 to 200200 to 400400 to 6006 00 to 1,000more than 1,000
RAINFALL
Israel copes for decades with the water shortage problem.
Regional Annual Rainfall
A significant decrease of the
average amount of rainfall of about 6
mm/year
Increase in time between rain events
Climate Change Effects
Decrease in the quantity of rainfall
5
From an average time of 7 day to 10 days
0%
10%
Israel Spain Australia Italy Greece C Europe
20%
30%
40%
50%
60%
70%
80%
<1%5%8%9%12%
75%
Reused effluent
6
5 Year Target = 90%
Agriculture client for the effluent that requires a high reliable quality
Stricter Effluent Requirements
Secondary Effluent
BOD, TSS
Tertiary Effluent
BOD, TSS, TN, NH3, P
pH, Turbidity, EC,
Cl, Na, B
Heavy metals
E coli
Restricted Irrigation Unrestricted Irrigation
1990’s 2010’s
Deviations in Effluent quality
Main factors that can cause effluent degradation:
Plant operations
Loads (organic/flows) greater than the design capacity