drinking water treatment lca & lcc · 0,07 m3/s design 1 kwh/m3 1,5 hm3/year 1 municipality...
TRANSCRIPT
Drinking Water Treatment
LCA & LCC
Agbar Tower, May 21st, 2015
Final Event Presentation
MJ.Amores, Project Manager, Cetaqua
C. Arnal, Economist, Cetaqua
1. Introduction (I)
Drinking Water
Drinking Water
1. Introduction (II): Plants description
DWTP O Coto
0,07 m3/s design 1 kWh/m3
1,5 Hm3/year 1 municipality (13.700 inhab.)
Spring + river water abstraction
Settling
Disinfection
Coagulation
Sand Filters
DWTP Ampolla
4 m3/s design 0,810 kWh/m3
65,90 Hm3/year 63 municipalities (684.921 inhab.)
37% industrial water
River water abstraction
Preoxidation
Coagulation & settling
Sand filtration
GAC filtration
Disinfection
Thickening
Dewatering
Solar drying
2. Environmental general results (I)
GWP: 716 t CO2,eq/year
ODP: 0,001 t CFC-11,eq/year
EU: 1,4 t PO43-, eq/year
CED: 1,44E+07 MJ eq /year
GWP: 480 t CO2,eq/year
ODP: 0,001 t CFC-11,eq/year
EU: 0,9 t PO43-, eq/year
CED: 1,02E+07 MJ eq /year
Year of study: 2011
0%
20%
40%
60%
80%
100%
Global
warming 100a
Ozone layer
depletion 40a
Eutrophication Cumulative
Energy
Demand
Drinking Water Treatment, Betanzos
-20%
0%
20%
40%
60%
80%
100%
Global
warming 100a
Ozone layer
depletion 40a
Eutrophication Cumulative
Energy
Demand
Drinking Water Treatment, Calafell
Infrastructure
Transport
Energy
Chemicals
Waste
Materials
Sludge
Management
2. Environmental general results (II)
0,00E+00
1,00E-01
2,00E-01
3,00E-01
4,00E-01
5,00E-01
Construction O&M Construction O&M
Calafell Betanzos
GWP (kg CO2,eq/m3)
0,00E+00
1,00E-08
2,00E-08
3,00E-08
4,00E-08
Construction O&M Construction O&M
Calafell Betanzos
ODP (kg CFC-11,eq/m3)
0,00E+00
1,00E-04
2,00E-04
3,00E-04
4,00E-04
5,00E-04
6,00E-04
7,00E-04
8,00E-04
9,00E-04
1,00E-03
Construction O&M Construction O&M
Calafell Betanzos
EU (kg PO4 -3 eq/m3)
0,00E+001,00E+002,00E+003,00E+004,00E+005,00E+006,00E+007,00E+008,00E+009,00E+001,00E+01
Construction O&M Construction O&M
Calafell Betanzos
CED (MJ eq/m3)
2. Economic General results
110.231 €/year
351.632 € €/year
185.324 €/year
1.087.973 €/year
Betanzos
Calafell
Construction Operation & maintenance
3. Environmental results (O&M)
-20%
0%
20%
40%
60%
80%
100%
GWP (kg CO2 eq./m3 ODP (kg CFC-11 eq./m3) EU (kg PO4 eq./m3) CED (MJ eq./m3)
Drinking Water Treatment, Calafell Water Abstraction
Oxidation with chlorine
Coagulation
Flocculation
Settling
Filtration with Sand Filters
Adsorption with activated carbon
Chlorination
Impulsion
Thickening
Dewatering
Solar drying
Sludge management
Non Hazardous Waste
Hazardous Waste
Other Energy consums
General costs
Local Water Abstraction
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
GWP (kg CO2 eq./m3 ODP (kg CFC-11 eq./m3) EU (kg PO4 eq./m3) CED (MJ eq./m3)
Drinking Water Treatment, Betanzos Water Abstraction
Disinfection
Coagulation
Filtration
Distribution
3. Economic results (O&M) (I)
Energy consumption 18,9%
NaClO2 : 6,0%
Energy consumption : 7,0%
Energy consumption : 8,1%
Indirect cost: 45,2%
Material and subcontrators : 2,6%
Personnel: 11,3%
Material and subcontrators : 4,9%
Personnel: 3,3% Energy consumption : 7,6%
Replacements: 3,8%
Activated carbon: 1,5%
NaClO2 : 1,1%
Energy
consumption : 4%
Indirect cost : 68,5%
Betanzos
Calafell
3. Economic results (O&M) (II)
Fees
•694.337,05 €/year
•64%
M&S
•170.350,54 €/year
•16%
Energy
•159.209,67 €/year
•15%
Personnel
•64.075,83 €/year
•5%
CA
LAFELL
M&S
•174.850,86 €/year
•50%
Energy
•120.893,68 €/year
•34%
Personnel
•55.887,17 €/year
•16%
BETA
NZO
S
4. Sensitivity analysis/ Best practices (I)
(%) 2011 2012 2013 2014
Green
Electricity 87 87 93 96
With Green electricity
Current Result DWT Calafell
Scenario I
Without Green Electricity
Previous Result DWT Calafell
Scenario II
4. Sensitivity analysis/ Best practices (II)
-5,00E-02
0,00E+00
5,00E-02
1,00E-01
1,50E-01
2,00E-01
2,50E-01
3,00E-01
3,50E-01
Scenario I
GWP (kg CO2 eq./m3)
Scenario II
GWP (kg CO2 eq./m3)
GWP (kg CO2, eq/m3), Calafell Local Water Abstraction
General
Other Energy consums
Hazardous Waste
Non Hazardous Waste
Sludge management
Solar drying
Dewatering
Thickening
Impulsion
Chlorination
Adsorption with activated
carbonFiltration with Sand Filters
Settling
47%
11%
-1,00E-08
0,00E+00
1,00E-08
2,00E-08
3,00E-08
4,00E-08
5,00E-08
6,00E-08
Scenario I
ODP (kg CFC-11
eq./m3)
Scenario II
ODP (kg CFC-11
eq./m3)
ODP (kg CFC-11, eq/m3), Calafell Local Water Abstraction
General
Other Energy consums
Hazardous Waste
Non Hazardous Waste
Sludge management
Solar drying
Dewatering
Thickening
Impulsion
Chlorination
Adsorption with activated
carbonFiltration with Sand Filters
Settling
-1,00E-04
0,00E+00
1,00E-04
2,00E-04
3,00E-04
4,00E-04
5,00E-04
Scenario I
EU (kg PO4 eq./m3)
Scenario II
EU (kg PO4 eq./m3)
EU (kg PO4-3, eq/m3), Calafell
Local Water Abstraction
General
Other Energy consums
Hazardous Waste
Non Hazardous Waste
Sludge management
Solar drying
Dewatering
Thickening
Impulsion
Chlorination
Adsorption with
activated carbonFiltration with Sand Filters
Settling -1,00E+00
0,00E+00
1,00E+00
2,00E+00
3,00E+00
4,00E+00
5,00E+00
6,00E+00
7,00E+00
8,00E+00
Scenario I
CED (MJ,eq/m3)
Scenario II
CED (MJ,eq/m3)
CED (MJ eq/m3), Calafell Local Water Abstraction
General
Other Energy consums
Hazardous Waste
Non Hazardous Waste
Sludge management
Solar drying
Dewatering
Thickening
Impulsion
Chlorination
Adsorption with activated
carbonFiltration with Sand Filters
Settling
↓54% ↓27%
↓48% ↓59%
24%
34%
21%
7%
Imp
Abst
Imp
Abst
5. Conclusions
• The environmental and economic impacts linked to DWT construction
phase are negligible compared to the ones related to operation and
maintenance.
• Water abstraction and Impulsion are the major environmental hotspots
(GWP, CED and EU) in O&M for Drinking Water treatment in Betanzos
due to their electricity consumption whereas Absorption with
Activated Carbon treatment is the major environmental contributor in
Calafell due to their production and transport (electricity emissions are
compensated).
• ODP shows major contribution at coagulation stage in both DWTs due
to the chloride chemicals (production and application).
• In economic terms, electricity consumption and chemicals are the
items with more associated cost in O&M of both DWTs.
• Large drinking water plants with high consumptions (electricity,
chemicals, etc) can reduce their general environmental impacts with
best practices as emissions compensations(using green electricity).
Thank you for
your attention