Micro Wastewater Treatment System using Photocatalysis

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Presentation of the Best Practice

Target challenge

Overexploited groundwater
Low sustainability of the treatment system
Other (Please specify below)

carbon footprint of water

Area Typology

Urban area

Main beneficiaries

Other (Please specify below)

Research

Funding

EU funding

Used technologies / tools

Others

Photocatalysis - Advance oxidation

Implementation site

Msida

NCW type

Greywater (GW)

NCW USE

Toilet Flushing
Garden Irrigation

Self-Assessment

TRL : Technology Levels

TRL4

Description of the innovative component:

Uses photocatalytic surfaces rather than powders.
Reduces environmental impacts, when compared to municipal water supply + treatment.
Size: micro.

Obstacles to implementation

Lack of an adequate regulatory framework
High cost of technological solutions
Other (Please specify below)

relatively low electricity and water tariffs, zero cost of carbon emission

Social acceptance

Social impact of the BP

Economic viability

How your Best Practice is economically feasible ?

Environmental sustainability

Result of this assessment

A life cycle assessment was carried out to compare the environmental impacts of an alternative water supply for toilet flushing in households with those of water currently supplied for this purpose through the municipal potable water network. In the proposed system, greywater from showers, baths and wash-hand basins is collected and treated using heterogeneous TiO2 photocatalysis. Several scenarios comprising different design and operating conditions were studied. Using the ReCiPe (H) 2016 method, the following environmental impact categories were assessed: global warming, stratospheric ozone depletion, terrestrial acidification, freshwater eutrophication, marine eutrophication, human carcinogenic toxicity, human non-carcinogenic toxicity, terrestrial ecotoxicity, freshwater ecotoxicity, marine ecotoxicity, and water consumption. The results show that for the water reuse device to be less impactful than the municipal water system in at least 7 of the selected impact categories by more than 20 %, the product between the number of reactors and the operating time should not exceed 8 reactors·h·day−1, also taking the influence of the UVA-LED's power into account. Of the 18 alternative scenarios analyzed, 14 present a potential for reducing the environmental impacts compared to the municipal water supply system in at least 7 of the 11 evaluated environmental impact categories. For instance, the municipal supply of one cubic meter of water and its subsequent wastewater treatment in the baseline scenario produces 4.21 kg CO2 eq·m−3, whereas only 1.62 kg CO2 eq·m−3 are produced in the optimum scenario of the greywater reuse system. Moreover, the use of solar photovoltaic panels as a source of electricity for the systems is found to be an effective measure to further improve the environmental performance, mainly for the impact categories of global warming, stratospheric ozone depletion, and terrestrial acidification. The study also highlights the benefits of recycling components and materials in the end-of-life stage of the proposed system.

Enviromental impact

SDGs

Validation/upscaling

Prototype is full scale, optimisation still in progress

Potentiel of exploitation/outscaling

Yes

Recommandations

https://microwatts-water.com/wp-content/uploads/2021/09/MicroWatTs-full.mp4?_=1

Technical indicators

Average Treated flow rate

0.20

m3/Day

Economical indicators

Land footprint 10.00 m2/m3/day

Social indicators

Thank you for submitting your Best Practice

Your highlighted KPI

Technical indicators

Average Treated flow rate

0.20

m3/Day

Economical indicators

Land footprint 10.00 m2/m3/day

NCW Best practices inventory

Micro Wastewater Treatment System using Photocatalysis
Technical solution

Description

Presentation of the Best Practice

Target challenge

Area Typology

Main beneficiaries

Funding

Used technologies / tools

Implementation site

NCW type

NCW USE

Self-Assessment

TRL : Technology Levels

Obstacles to implementation

SDGs

Validation/upscaling

Potentiel of exploitation/outscaling

Recommandations

Highlighted KPI

Technical indicators

Economical indicators

Social indicators

More Informations

Contact

Print

Thank you for submitting your Best Practice

Your highlighted KPI

Technical indicators

Economical indicators

Social indicators

CONTACT

NCW Best practices inventory

Micro Wastewater Treatment System using Photocatalysis Technical solution

Description

Error message

Presentation of the Best Practice

Target challenge

Area Typology

Main beneficiaries

Funding

Used technologies / tools

Implementation site

NCW type

NCW USE

Self-Assessment

TRL : Technology Levels

Obstacles to implementation

SDGs

Validation/upscaling

Potentiel of exploitation/outscaling

Recommandations

Highlighted KPI

Technical indicators

Economical indicators

Social indicators

More Informations

Contact

Share Everywhere

Print

Thank you for submitting your Best Practice

Your highlighted KPI

Technical indicators

Economical indicators

Social indicators

Micro Wastewater Treatment System using Photocatalysis
Technical solution