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Kinetic study of nutrients removal from municipal wastewater by Chlorella vulgaris in photobioreactor supplied with CO2-enriched air
Indian Inst Technol, Ctr Environm Sci & Engn, Environm Infrastruct & Clean Technol EICT Lab, Mumbai 400076, Maharashtra, India.;Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117576, Singapore..
Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117576, Singapore.;Natl Univ Singapore, Environm Res Inst, Singapore, Singapore..
Mälardalen University, School of Business, Society and Engineering, Future Energy Center. Asian Inst Technol, Sch Environm Resources & Dev, Klongluang, Thailand..ORCID iD: 0000-0002-6551-848X
2020 (English)In: Environmental technology, ISSN 0959-3330, E-ISSN 1479-487X, Vol. 41, no 5, p. 617-626Article in journal (Refereed) Published
Abstract [en]

The microalgae Chlorella vulgaris ATCC 13482 was used in the present study for municipal wastewater treatment. Batch experiments were performed in bubble column photobioreactors of 7 L working volume maintained at 25 +/- 2 degrees C and 14 h/10 h of photo and dark cycle. The treatment process was enhanced by using CO2-augmented air (5% CO2 v/v) supply into the microalgal culture in comparison to the use of normal air (0.03% CO2 v/v). For a period of 7 days, C. vulgaris effected maximum removals of 74.4% soluble fraction of chemical oxygen demand, 72% ammonia (NH4-N), 60% nitrate (NO3-N) and 81.93% orthophosphate (PO4-P) with use of normal air, whereas 84.6% sCOD, 88% NH4-N, 72% NO3-N and 92.8% PO4-P removals, respectively, with use of 5% CO2/air supply. Using kinetic study data, the specific rates of ammonia and phosphate uptake (q(ammonia) and q(phosphate)) by C. vulgaris at 5% CO2/air supply were found to be 2.41 and 0.85 d(-1), respectively. Using the algal remediation technology, nitrogen-phosphorus-potassium recovery from sewage treatment plant of 37.5 million litres per day wastewater influent capacity was calculated to be similar to 298.5, 55.4 and 83.7 kg d(-1), respectively.

Place, publisher, year, edition, pages
TAYLOR & FRANCIS LTD , 2020. Vol. 41, no 5, p. 617-626
Keywords [en]
Chlorella vulgaris, kinetic study, municipal wastewater, nutrient bioremediation, photobioreactor
National Category
Environmental Biotechnology
Identifiers
URN: urn:nbn:se:mdh:diva-47028DOI: 10.1080/09593330.2018.1508250ISI: 000509687700008PubMedID: 30074855Scopus ID: 2-s2.0-85052102022OAI: oai:DiVA.org:mdh-47028DiVA, id: diva2:1392882
Available from: 2020-02-13 Created: 2020-02-13 Last updated: 2020-02-20Bibliographically approved

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Dikshit, Anil Kumar

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