Transcript Diapositiva 1

NEW CONCEPTUAL
APPROACH TO WATER
MANAGEMENT FOR
ECO - DISTRICTS
Dr. Jochen Scheerer
Biologist
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
 ASEPMA is a Catalan engineering company working in the field
of water management, water treatment and is specialised in the
reuse of non potable water.
 Since its beginning in 2003, ASEPMA has offered its services to
a great number of clients coming from the field of public
administrations all kind of industries as well as private customers
like architects, promoters, etc.
 Our services include the whole range of tasks related to the
management of water cycle beginning with consultancy, project
design, installation and maintenance and control of treatment
facilities for non potable water.
 ASEPMA works nationally (Spain) and also internationally.
 Among our clients : City of Barcelona, City of Tarragona, Catalan
Water Agency, BASF, Bayer, ArcelorMittal, Mall Plaza Group,
Spanish Ministry of Defence,….
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
INDEX
1.- The Issue
2.- The Problem
3.- Introduction
4.- New conceptual approach
5.- Examples
6.- Study Case
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
The Issue
Water management
Wallonia:
-
Water supply 80 % from groundwater
Catalonia:
- Water supply 70 % from dams
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
The Issue
Main drinking water supply for Barcelona
Image: gencat
Image: City of Barcelona
Image: www.xcitingclub.es
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
The Problem
Situation April 2008
Image: ibl news
Image: City of Barcelona
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
The Problem
Emergency supply May 2008
22.000.000,00 €/ month
Imagen: City of Barcelona
Imagen: EFE
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
The Problem
What has this to do with the situation in Wallonia?
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
The Problem
Wallonia has the same water explotation index as Catalonia !
You just don’t see it easily!!!
Source: European Environment Agency
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Introduction
1. What we are talking about?
Water:
A chemical compound with special characteristics.
Management:
Activities to accomplish desired goals and objectives
using available resources efficiently and effectively.
Eco- District:
Urban planning aiming to integrate objectives of
sustainable development.
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Introduction
- Water is H2O
- Water is an universal solvent
- Water has the second biggest heat
capacity of all known substances
- Water is the basis of life
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Introduction
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Introduction
Current urban water cycle:
Source: City of Barcelona
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Introduction
Current concept of water usage:
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Introduction
Usage
Plantas
Plants
4%
Drinking
cooking
Beberan
y cocinar
5%
Cleaning
Limpieza
Shower
Ducha & Bañera
4%
37%
Lavar
ropa
Washing
13%
Lavar platos
Dishwashing
Retrete
Toilet
6%
31%
Consumo medio
diario/persona
: 182 110
litros
Domestic consumption
average
in Walonia:
liters/per/day
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Introduction
Consumption in toilet tank : 25 liters
Consumption in shower : 40 liters
Consumption in bathtub: 200 liters
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Introduction
Eco districts
 Energy efficiency
 Water efficiency
 Reducing heat island effect
 Increase of biodiversity
 Resilience
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Introduction
Water Scarcity
Water scarcity occurs where there are
insufficient water resources to satisfy longterm average requirements. It refers to
long-term water imbalances, combining low
water availability with a level of water
demand exceeding the supply capacity of
the natural system.
Water-scarcity can be defined by the water
exploitation index (WEI). Wei divides the
total water abstraction by the long term
annual average (LTAA) resource
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Introduction
The price of water
 Drinking water supplied to consumers in Walonia: approx. 4,28 €/ m3
This corresponds to an approximate price of 0,0042 € per liter of drinking water, supplied
to the final point of the domestic consumption, including urban drainage and treatment of
waste water!
Is that cheap or expensive?!
 Bottled
drinking water: between 0,70 and 80 € per liter
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
A new approach
Concept of diversification of our water sources
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
A new approach
Alternative source 1. Treated an reclaimed waste water
HUMAN COSNUMPTION
Drinking water
PERSONAL HYGIENE
GREY WATER
WASTEWATER
TOILET
BLACK WATER
Reclaimed water
IRRIGATION
TREATMENT AND REGENERATION
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
A new approach
Alternative source 1.1. Grey water usage
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
A new approach
Alternative source 2. Rainwater
Precipitations Charleroi: aprox. 790 l/ m2 x a; 200 days/ a
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
A new approach
Alternative source 2. Rainwater
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
A new approach
Concept of decentralized water
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
A new approach
Over dimensioning of centralized sewer systems
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Examples
Location: Castellbisbal (Catalonia)
Extrapolation
Collecting area: Roof 1.800 m2
Location: Charleroi (Wallonia)
Water use: Irrigation and street cleaning
Precipitation: 793 mm/ m2 x a
Tank capacity: 25 + 20 m3
Efficiency: 85 %
Tank material: PRFV
Rainwater harvesting: 1.213m3/ a
Equipment
29.900€
and
installation
(without building works)
cost:
Usage:
WC flushing for 97 People during 1year
Amortisation: approx. 6 years*
(* considering 4,28 €/ m3 drinking water)
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Examples
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Examples
Location: Tarragona (Catalonia)
Water use: Irrigation of 6000 m2
of green area in a
public park
Capacity: 24.000 liters/day
Treatment system:
1. Septic tank
2. Total oxidation with fixed bed
3. Vertical wetland + UV
Water Savings: 8.760 m3/ a = Yearly drinking water demand of 218 people in Walonia
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Examples
Smart Park Tabacalera, Tarragona, Spain
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Case Study
ECO District Barcelona:
Total Surface:
Resident population:
Non resident population:
Green areas:
Houses:
Ofices:
Public service areas:
Streets and pavements:
10.00 m2
1.200
600
29,5 %
30,0 %
10,0 %
10,5 %
20,0 %
Source: City of Barcelona
Conceptual water management design:
- Decentralised grey water treatment and reuse for WC flushing
- Rainwater harvesting and reuse for irrigation
- IN SITU rainwater infiltration
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Case Study
Current water management
New approach using rain and greywater (extensive treatment)
Drinking water consumption
63.500 m3/ a
40.362 m3/ a
Water Costs
139.701 €/ a
121.883 €/ a
Energy consumption
59.202 kWh/ a
45.827 kWh/ a
Spill to public sewer
62.391 m3/ a
37.253 m3/a
Investment costs in rainwater drainage
(15 year amort.)
13.164 €/ a
10.167 €/ a
Total anual costs
152.865 €/ a
132.050 €/ a
Water savings compared to
conventional management
0
23.139 m3/ a
Energy savings comared to
conventional management
0
13.375 kWh/ a
Spill reduction compared to
conventional management
0
25.138 m3/ a
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Reflections
- Water scarcity often is not very obvious until it becomes a real problem.
- Management of water has to consider both quantity and quality criteria.
- Alternative water management including decentralised systems and
diversification of water source is not more expensive than traditional water
management.
- Alternative and decentralised water management reduces significantly
drinking water consumption and spill to waste water treatment plants.
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Reflections
- Alternative and decentralised water management reduces significantly
drinking water consumption and spill to waste water treatment plants.
- Today water management is not a technical problem, rather a conceptual
one.
- Smart water management needs to consider in every case the particular
circumstances of the project.
- Drinking water, like energy is a precious resource, however commonly
undervalued due to a supposed easy and unlimited access and it´s relatively
low cost.
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE
Thank you for your
attention!
www.asepma.com
ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE