Polishing of anaerobic secondary effluent by Chlorella vulgaris under low light intensity

Handle URI:
http://hdl.handle.net/10754/624043
Title:
Polishing of anaerobic secondary effluent by Chlorella vulgaris under low light intensity
Authors:
Cheng, Tuoyuan ( 0000-0001-5170-6546 ) ; Wei, Chunhai; Leiknes, TorOve ( 0000-0003-4046-5622 )
Abstract:
To investigate anaerobic secondary effluent polishing by microalgae (Chlorella vulgaris) under low light intensity (14 μmol/m2/s), bubbling column reactors were operated in batches of 8 d with initial ammonium nitrogen 10-50 mg/L, initial phosphate phosphorus 2-10 mg/L and microalgal seed 40 mg/L. Maximum microalgal biomass and minimum generation time were 370.9 mg/L and 2.5 d, respectively. Nitrogen removal (maximum 99.6%) was mainly attributed to microalgal growth rate, while phosphorus removal (maximum 49.8%) was related to microalgal growth rate, cell phosphorus content (maximum 1.5%) and initial nutrients ratio. Dissolved microalgal organics release in terms of chemical oxygen demand (maximum 63.2 mg/L) and hexane extractable material (i.e., oil and grease, maximum 8.5 mg/L) was firstly reported and mainly affected by nitrogen deficiency and deteriorated effluent quality. Ultrafiltration critical flux (16.6-39.5 L/m2/h) showed negative linear correlation to microalgal biomass. Anaerobic membrane bioreactor effluent polishing showed similar results with slight inhibition to synthetic effluent.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Water Desalination and Reuse Research Center (WDRC)
Citation:
Cheng T, Wei C-H, Leiknes T (2017) Polishing of anaerobic secondary effluent by Chlorella vulgaris under low light intensity. Bioresource Technology 241: 360–368. Available: http://dx.doi.org/10.1016/j.biortech.2017.05.149.
Publisher:
Elsevier BV
Journal:
Bioresource Technology
Issue Date:
29-May-2017
DOI:
10.1016/j.biortech.2017.05.149
Type:
Article
ISSN:
0960-8524
Sponsors:
The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0960852417308179
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorCheng, Tuoyuanen
dc.contributor.authorWei, Chunhaien
dc.contributor.authorLeiknes, TorOveen
dc.date.accessioned2017-06-05T06:02:24Z-
dc.date.available2017-06-05T06:02:24Z-
dc.date.issued2017-05-29en
dc.identifier.citationCheng T, Wei C-H, Leiknes T (2017) Polishing of anaerobic secondary effluent by Chlorella vulgaris under low light intensity. Bioresource Technology 241: 360–368. Available: http://dx.doi.org/10.1016/j.biortech.2017.05.149.en
dc.identifier.issn0960-8524en
dc.identifier.doi10.1016/j.biortech.2017.05.149en
dc.identifier.urihttp://hdl.handle.net/10754/624043-
dc.description.abstractTo investigate anaerobic secondary effluent polishing by microalgae (Chlorella vulgaris) under low light intensity (14 μmol/m2/s), bubbling column reactors were operated in batches of 8 d with initial ammonium nitrogen 10-50 mg/L, initial phosphate phosphorus 2-10 mg/L and microalgal seed 40 mg/L. Maximum microalgal biomass and minimum generation time were 370.9 mg/L and 2.5 d, respectively. Nitrogen removal (maximum 99.6%) was mainly attributed to microalgal growth rate, while phosphorus removal (maximum 49.8%) was related to microalgal growth rate, cell phosphorus content (maximum 1.5%) and initial nutrients ratio. Dissolved microalgal organics release in terms of chemical oxygen demand (maximum 63.2 mg/L) and hexane extractable material (i.e., oil and grease, maximum 8.5 mg/L) was firstly reported and mainly affected by nitrogen deficiency and deteriorated effluent quality. Ultrafiltration critical flux (16.6-39.5 L/m2/h) showed negative linear correlation to microalgal biomass. Anaerobic membrane bioreactor effluent polishing showed similar results with slight inhibition to synthetic effluent.en
dc.description.sponsorshipThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0960852417308179en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Bioresource Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Bioresource Technology, 26 May 2017. DOI: 10.1016/j.biortech.2017.05.149. © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectAnaerobic effluenten
dc.subjectHexane extractable materialen
dc.subjectMicroalgaeen
dc.subjectNitrogen and phosphorus ratioen
dc.subjectNutrients deficiencyen
dc.titlePolishing of anaerobic secondary effluent by Chlorella vulgaris under low light intensityen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalBioresource Technologyen
dc.eprint.versionPost-printen
kaust.authorCheng, Tuoyuanen
kaust.authorWei, Chunhaien
kaust.authorLeiknes, TorOveen
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