Impact of mixed microalgal and bacterial species on organic micropollutants removal in photobioreactors under natural light

TY - JOUR

T1 - Impact of mixed microalgal and bacterial species on organic micropollutants removal in photobioreactors under natural light

AU - Wu, Kaiyi

AU - Leliveld, Tino

AU - Zweers, Hans

AU - Rijnaarts, Huub

AU - Langenhoff, Alette

AU - Fernandes, Tânia V.

N1 - Data archiving: on request

PY - 2024/2/1

Y1 - 2024/2/1

N2 - Single microalgae species are effective at the removal of various organic micropollutants (OMPs), however increased species diversity might enhance this removal. Sixteen OMPs were added to 2 continuous photobioreactors, one inoculated with Chlorella sorokiniana and the other with a microalgal-bacterial community, for 112 d under natural light. Three media were sequentially used in 3 Periods: I) synthetic sewage (d 0–28), II) 10x diluted anaerobically digested black water (AnBW) (d 28–94) and III) 5x diluted AnBW (d 94–112). Twelve OMPs were removed > 30 %, while 4 were < 10 % removed. Removal efficiencies were similar for 9 OMPs, yet the mixed community showed a 2–3 times higher removal capacity (µg OMP/g dry weight) than C. sorokiniana during Period II pseudo steady state. The removal decreased drastically in Period III due to overgrowth of filamentous green algae. This study shows for the first time how microbial community composition and abundance are key for OMPs removal.

AB - Single microalgae species are effective at the removal of various organic micropollutants (OMPs), however increased species diversity might enhance this removal. Sixteen OMPs were added to 2 continuous photobioreactors, one inoculated with Chlorella sorokiniana and the other with a microalgal-bacterial community, for 112 d under natural light. Three media were sequentially used in 3 Periods: I) synthetic sewage (d 0–28), II) 10x diluted anaerobically digested black water (AnBW) (d 28–94) and III) 5x diluted AnBW (d 94–112). Twelve OMPs were removed > 30 %, while 4 were < 10 % removed. Removal efficiencies were similar for 9 OMPs, yet the mixed community showed a 2–3 times higher removal capacity (µg OMP/g dry weight) than C. sorokiniana during Period II pseudo steady state. The removal decreased drastically in Period III due to overgrowth of filamentous green algae. This study shows for the first time how microbial community composition and abundance are key for OMPs removal.

U2 - 10.1016/j.biortech.2023.130083

DO - 10.1016/j.biortech.2023.130083

M3 - Article

SN - 0960-8524

VL - 393

JO - Bioresource Technology

JF - Bioresource Technology

M1 - 130083

ER -