Pharmaceutical Contaminants in water recovery facilities
Anette åkerstrøm algalbioremediation15_11_12
1.
2. Algal bioremediation of a high strength
wastewater-Growth, Nutrient removal and
Biomass production
Anette Åkerström
3. NORWEGIAN UNIVERSITY OF LIFE SCIENCES
and biomass production
Algal bioremediation of a high strength wastewater-Growth, Nutrient removal
This Research:
Part of a collaboration project A Sustainable Process to
Capture and Store CO2 to Increase Production of
Renewable Bioenergy, owned by Biowater technology AS
and sponsored by The Research Council of Norway
(BILAT).
Integrating algae cultivation system into wastewater
treatment plants.
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4. 4
sludge liquor
N/P rich
Low N/P
Anaerobic
effluent
digestion
Energy
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CO2
production
Algae
Sludge
Algal bioremediation of a high strength wastewater-
Growth, Nutrient removal and biomass production
NORWEGIAN UNIVERSITY OF LIFE SCIENCES
5. NORWEGIAN UNIVERSITY OF LIFE SCIENCES
and biomass production
Algal bioremediation of a high strength wastewater-Growth, Nutrient removal Can algae grow in such turbid wastewater?
Sludge liquor has low light transmission that reduces
photosynthesis.
High N:P ratio that can lead to P limitation.
High pH and ammonium concentration that can lead to ammonia
toxicity.
Sludge liquor
Total Nitrogen (mg/L) 1210
Total Phosphorus
(mg/L) 28
Total suspended
solids (mg/L) 1590
COD (mg/L) 3700
Sludge liquor Light transmission
(670 nm, 1 cm light
path) 2.8 %
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6. NORWEGIAN UNIVERSITY OF LIFE SCIENCES
Growth, Nutrient removal and biomass production
Algal bioremediation of a high strength wastewater-
Growth of Chlorella sp. was tested in batch
cultures with sludge liquor concentration from
100, 70, 50, 40, 25 and 12 %.
Nutrient reduction in the supernatant and the
chemical composition of the algae biomass.
Concentration of % Light Total Phosphorus
sludge liquor (%) transmission (mg/L)
12 85 4
25 71 8
40 20 11
50 15 14
70 8 19
100 2.8 28
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7. NORWEGIAN UNIVERSITY OF LIFE SCIENCES
Growth, Nutrient removal and biomass production
Algal bioremediation of a high strength wastewater- Growth rate of the batch cultures from the start of the
experiment and to day 5,6, 7 and 8.
0 ,9 5
t2= 5
t2= 6
0 ,9 0
t2= 7
t2= 8
0 ,8 5
G ro w th ra te D a y -1
0 ,8 0
0 ,7 5 Algae can grow in pure
sludge liquor but the
0 ,7 0 growth rate can be
increased by increasing
0 ,6 5
the light transmission by
dilution.
0 ,6 0 P-limitation Light limitation
0 ,5 5
12 25 40 50 70 100
C o n c e n tra tio n o f s lu d g e liq u o r (% )
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8. NORWEGIAN UNIVERSITY OF LIFE SCIENCES
Growth, Nutrient removal and biomass production
Algal bioremediation of a high strength wastewater- Equal nitrogen and phosphorus removal in 40 % and 100 %
concentration of sludge liquor.
The cellular N and P content is increasing with concentration of N
and P in the medium.
Increasing the light transmission from 2.8 % to 20 % resulted in a
doubling in biomass production.
40 % 100 %
Nitrogen removal % 36 32
Phosphorus removal % 94 89
Cellular N Content % 7 9
Cellular P Content % 0,5 1,5
Biomass g/L *Day 0,6 0,3
Biomass g/L 2,11 1,3
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9. NORWEGIAN UNIVERSITY OF LIFE SCIENCES
Growth, Nutrient removal and biomass production
Algal bioremediation of a high strength wastewater- Other objectives
Productivity, Nutrient removal and uptake of N and P in
natural light and 3 temperature treatments.
The synergistic effects of CO2, Temperature and
Irradiance. Laboratory studies.
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10. NORWEGIAN UNIVERSITY OF LIFE SCIENCES
Growth, Nutrient removal and biomass production
Algal bioremediation of a high strength wastewater-
Acknowledgements
Thanks to BioWater AS, Silje Roksti (our algae
technicians) and Trina Halfhide (Fulbright scholar and
algaeneer).
Thank you for your attention!
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