CO2 fixation capability of Chlorella sp. and its use in treating agricultural wastewater

Harizah Bajunaid Hariz, Mohd Sobri Takriff, Muneer M. Ba-Abbad, Nazlina Haiza Mohd Yasin, Noor Irma Nazashida Mohd Hakim

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Palm oil mill effluent (POME) is a highly polluted agro-industrial wastewater. The CO2 in industrial flue gas requires treatment before it can be discharged into the environment. Utilizing microalgae as the agent to treat wastewater and industrial flue gas is a waste-to-wealth approach. The resulting biomass can be commercialized in the form of valuable products. Chlorella sp. is a microalgal species that can tolerate the pollutant load and has been proven to be a suitable species for CO2 fixation. In this study, Chlorella sp. was cultivated in POME with the aim of reducing the pollutants in the POME and simultaneously capturing CO2. The optimization of the operational conditions of this microalgae-based treatment system was carried out using the response surface methodology (RSM) face centered-central composite design (FC-CCD). Operational factors include the air concentration of CO2 (10–25% v/v), the inlet gas flow rate of 500–2000 mL min−1, and initial inoculum concentration (10–30% v/v) of Chlorella sp. cultivated in POME. The target deliverables include the maximum amount of CO2 fixed by Chlorella sp. and the total nitrogen (TN) reduction as indicators of pollutant reduction by this treatment system. We found that a limited supply of CO2 caused growth limitation, while excess CO2 resulted in acid production that triggered microalgae growth inhibition. The optimum operational conditions were 10% v/v CO2, 1670 mL min−1 aeration rate, and 24.8% v/v inoculum concentration, predicted to simultaneously fix CO2 at 0.12 g of CO2 L−1 day−1 and reduce 80.9% TN, respectively.

Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalJournal of Applied Phycology
DOIs
Publication statusAccepted/In press - 16 May 2018

Fingerprint

Chlorella
fixation
wastewater
mill
carbon dioxide
effluent
oil mill effluents
oil
microalgae
nitrogen
gas flow
aeration
inoculum
pollutants
pollutant
acid
biomass
air
pollution load
response surface methodology

Keywords

  • Bio-fixation
  • Chlorophyta
  • Effluent treatment
  • Greenhouse gases (GHGs)
  • Palm oil mill effluent (POME)
  • Phycoremediation

ASJC Scopus subject areas

  • Aquatic Science
  • Plant Science

Cite this

CO2 fixation capability of Chlorella sp. and its use in treating agricultural wastewater. / Hariz, Harizah Bajunaid; Takriff, Mohd Sobri; Ba-Abbad, Muneer M.; Mohd Yasin, Nazlina Haiza; Mohd Hakim, Noor Irma Nazashida.

In: Journal of Applied Phycology, 16.05.2018, p. 1-11.

Research output: Contribution to journalArticle

Hariz, Harizah Bajunaid ; Takriff, Mohd Sobri ; Ba-Abbad, Muneer M. ; Mohd Yasin, Nazlina Haiza ; Mohd Hakim, Noor Irma Nazashida. / CO2 fixation capability of Chlorella sp. and its use in treating agricultural wastewater. In: Journal of Applied Phycology. 2018 ; pp. 1-11.
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