MICROPOLLUTANT REMOVAL
in Wastewater Treatment Plants (WWTP)
MIECF 2023 | 18th August
Adriana GONZALEZ OSPINA I Suez I Engineering & Construction
Micropollutants
why a concern?
Ubiquity
Numerous compounds
Ecotoxicity & Sanitary impacts
Toxic effects at very low concentration on
human health and/or the environment
2023MIECF - Micropollutants treatment in Wastewater Treatment Plants
2
Mitigation ways
1.
2.
Control the production and use
of chemicals
Regulate their treatment in WWTP
Regulation basis
•
•
•
•
Not worldwide adoption
1 country regulating MP removal
in WWTP
Many initiatives to tests
A review of the European UWTD*
Ongoing European regulation project
For all Europe area
A key role of WWTP as a strategic
collection and treatment point
WWTP
> 100 000
PE
50%
2030
• Conventionally not designed for MP removal, with less
and variable performances
• Additional treatments are required, with technologies
validated for wastewater matrix
100%
2035
Only for sensitive areas defined in 2030
> 10 000 PE
50%
2035
100%
2040
Based on 12 MP to be removed at 80%
UWTD: Urban Wastewater Treatment Directive
P.E: People Equivalent
2023MIECF - Micropollutants treatment in Wastewater Treatment Plants
3
Actions levers before complementary treatments
BENEFITS
protect
biodiversity &
water resources
encourage
water reuse
4
8/18/23
2023MIECF - Micropollutants treatment in Wastewater Treatment Plants
SUEZ technical
solutions for
MICROPOLLUTANTS
5
Technical solutions
Activated Carbon & Oxidation-based solutions
whitin an integrated schema
3 challenges
•
•
•
High treated water quality
Cost effective & low footprint
Circular economy
2023MIECF - Micropollutants treatment in Wastewater Treatment Plants
6
Customized approach
Integrated Treatment
O3 or PAC
addition
Tertiary
Treatment
Primary treatment
Biological treatment
PAC: powdered activated carbon
GAC: granular activated carbon
Quaternary
Treatment
to receiving water
body or to reuse
treatment lines
PAC
or Ozonation + filter (option)
or Ozonation + GAC
Filtration
or GAC
A dedicated 2-points treatment for micropollutants removal
2023MIECF - Micropollutants treatment in Wastewater Treatment Plants
7
Ozonation treatment
Oxyblue - quaternary treatment
ozone production onsite
specific contact tank reactor for injection and O3 transfer
hydrodynamics & contact time mastered
FluOM tool to monitor performances & directly control the
O3 dosage
Micropollutants & disinfection action
v
Bio3 : integrated treatment
2023MIECF - Micropollutants treatment in Wastewater Treatment Plants
Possible transformation products or oxidation
by-products generation
ozone is injected with a venturi hydro ejector in a specific
mixed liquor recirculation loop
8
PAC treatment
Pulsagreen: quaternary treatment
1. Vacuum chamber
2. Perforated raw water
distribution pipes
3. Stilling baffle
4. Sludge blanket
upper level
5. Lamellar modules
6. Clarified water outlet
7. Sludge extraction
contact & separator function in the same reactor
adsorption using a coagulated blanket of PAC
optimal use of PAC by cyclic pulsations
v coagulant utilization
v continuous addition with non regenerable AC
v carbon sludge production
BioPAC : integrated treatment
2023MIECF - Micropollutants treatment in Wastewater Treatment Plants
coagulated PAC is added directly within the
biological reactor
9
GAC treatment
Carbablue: tertiary treatment
Down filtration adapted for reuse, extending filtration time
continuous carbon renewal for stable
bed volume and performances
no carbon sludge production
footprint enhanced
FluOM tool to monitor & adjust the
GAC renewal frequency
Carbablue Up: quaternary treatment
2023MIECF - Micropollutants treatment in Wastewater Treatment Plants
higher velocities, expansion of GAC
with limited fouling
10
Criteria for technological choice
Type of micropollutants to be treated
Global treatment objectives
Feed water quality to be treated
• Micropollutants
• Disinfection
• Organic, TSS,
Phosphorous
To optimize flexibility and costs
Solution to treat also a wider range of micropollutants
Combined & Integrated treatments
2023MIECF - Micropollutants treatment in Wastewater Treatment Plants
11
Take home messages
•
Activated carbon or oxidation are proven and available technologies to treat MP
•
The integrate schema into the biological reactor:
•
optimize the design and performances
•
facilitate the implementation for new or existing WWTP
•
add significant and positive impact on biological treatment
footprint
reduction
less
micropollutants
into sludge
BiO3
SVI
Reduction
clarifier
improvement
filamentous
bacteria
mitigation
Treated
water color
improvement
Thank you for your attention - MERCI
8/18/23
2023MIECF
* Créer des cycles. Pour la vie.
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