Nutrient utilization and oxygen production by Chlorella Vulgaris in a hybrid membrane bioreactor and algal membrane photobioreactor system

Najm, Yasmeen Hani Kamal; Jeong, Sanghyun; Leiknes, TorOve

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Type

Article

Authors

Najm, Yasmeen Hani Kamal

Jeong, Sanghyun
Leiknes, TorOve

KAUST Department

Biological and Environmental Sciences and Engineering (BESE) Division
Environmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)

Date

2017-02-17

Online Publication Date

2017-02-17

Print Publication Date

2017-08

Permanent link to this record

http://hdl.handle.net/10754/622923

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Abstract

This work studied oxygen production and nutrient utilization by Chlorella Vulgaris at different organic/inorganic carbon (OC/IC) and ammonium/nitrate (NH4+-N/NO3--N) ratios to design a hybrid aerobic membrane bioreactor (MBR) and membrane photobioreactor (MPBR) system. Specific oxygen production by C. vulgaris was enough to support the MBR if high growth is accomplished. Nearly 100% removal (or utilization) of PO43--P and IC was achieved under all conditions tested. Optimal growth was achieved at mixotrophic carbon conditions (0.353 d-1) and the highest NH4+-N concentration (0.357 d-1), with preferable NH4+-N utilization rather than NO3--N. The results indicate the potential of alternative process designs to treat domestic wastewater by coupling the hybrid MBR - MPBR systems.

Citation

Najm Y, Jeong S, Leiknes T (2017) Nutrient utilization and oxygen production by Chlorella Vulgaris in a hybrid membrane bioreactor and algal membrane photobioreactor system. Bioresource Technology. Available: http://dx.doi.org/10.1016/j.biortech.2017.02.057.