Presentation of the Best Practice
Target challenge
- NCW not valued locally
- Move towards zero discharge at local level
- Closing the water and nutrient cycle
- Low sustainability of the treatment system
- Operational conditions not optimised
- Inadequate strategy
- Vulnerability to climate Change
- Reclacitrance to use treated NCW
Area Typology
- Urban area
Main beneficiaries
- Water Utilities
- Local Population
- Municipalities
- Farmers
- Householders
- Management Authorities
Impact on the beneficiaries of your Best Practice:
Development of sustainable solution (LGW) with multi-effects and functions, ready to be adopted by stakeholders and decisionmakers.
Water available at the local level for multiuse.
Implementation of edible community garden for students thanks to the treated greywater and collected rainwater.
Water available at the local level for multiuse.
Implementation of edible community garden for students thanks to the treated greywater and collected rainwater.
Funding
- EU funding
- National funding
Used technologies / tools
- Desinfection process
- UV
- Nature based process
- Living wall
- Degreaser
- Living Green Wall
- Pretreatment
- Desinfection
- Olla trickle irrigation system
Implementation site
Tunis
NCW type
- Rainwater (RW)
- Greywater (GW)
NCW USE
- Toilet Flushing
- Garden Irrigation
Self-Assessment
TRL : Technology Levels
TRL7
Description of the innovative component:
The main innovation components are (1) the application of the constructed wetland design in vertical walls to tackle the low availability of area at urban context. (2) To optimise the interaction plant/substrates/greywater to reach the target quality of treated grey water function of the reuse.
Obstacles to implementation
- Lack of an adequate regulatory framework
- Isuffi cient funding instruments to support solution for NCW
- Lack of public acceptance of water reuse
- Lack of training of professionals to take up best practices in their portfolio
- Other (Please specify below)
- The NCW is not considered as ressource in the national governance system.
Obstacles to funding
High competition among very interesting projects and low number of funding projects.
How your Best Practice is economically feasible ?
Result of this assessment
Not availableEnviromental impact
SDGs
Energy consumption comment
Information is not available but energy is used for pumping and disinfection.
Validation/upscaling
The living Green Wall is a pilot implemented in a real site with possibilities to treat all produced grey water by the student house. It was adapted to the national context by applying, when possible…
Potentiel of exploitation/outscaling
The potential is very high considering that the LGW is adapted solution to water scarcity and adaptation to climate change as well as the transition of cities to green and sustainable ones.
Lessons learnt
Sustainable NBS need a holistic approach and multidisciplinary expertise for its implementation.
LGW is complex system strongly impacted by the local context.
LGW is complex system strongly impacted by the local context.
Recommandations
This Best Practice (BP) will be updated to integrate the efficiency and costs after optimisation and monitoring.
Highlighted KPI
Technical indicators
Average Treated flow rate
m3/Day
COD239.8 g/Day
Economical indicators
Land footprint
31.82
m2/m3/day
Land footprint
6745.45
m2/p.e
Social indicators
Job created/preserved/hab
0.01
Social impact of the BP
Jobs created
Jobs created comment: 2 engineers and 1 researcher have been recruited to conduct the LGW implementation and monitoring.