Nutrient removal of nursery and municipal wastewater using Chlorella vulgaris microalgae for lipid extraction

Aravinthan, Vasantha and Story, Nadine and Yusaf, Talal (2014) Nutrient removal of nursery and municipal wastewater using Chlorella vulgaris microalgae for lipid extraction. Desalination and Water Treatment, 52 (4-6). pp. 727-736. ISSN 1944-3994

Abstract

Microalgae grown in wastewater media can not only be exploited for the nutrient removal from the wastewater but also for the production of biofuels. In this paper, we investigated the growth of Chlorella vulgaris in iceberg lettuce nursery and municipal wastewater in a batch reactor. We analyzed the microalgal growth rate, nutrient removal rate and lipid production along with real-time monitoring of pH and dissolved oxygen (DO) dynamics during the culture period, which is rarely reported. NH4-N was found to be the preferred form of nitrogen among different species of nitrogen for the growth of microalgae, and total specific nitrogen depletion rates of 33.0 mg TN/gSS/d and 39.6 mg TN/gSS/d were observed for nursery and municipal wastewater respectively. The specific phosphate removal rates were 3.4 mg PO4-P/gSS/d and 10.8 mg PO4-P/gSS/d for nursery and municipal wastewater respectively. The algal growth in nutrient rich media resulted in increase in pH and dissolved oxygen (DO) concentration concurrently. The online measurements including pH and dissolved oxygen proved to be real-time indicators of algal growth not only during the different stages of culture period but also during dark and light hours in a day indicating definite variations in measured values depicting the photosynthesis's dynamics.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: First published online 6 Aug 2013. Permanent restricted access to ArticleFirst Version, in accordance with the copyright policy of the publisher. © 2013 Copyright Balaban Desalination Publications. Presented at the Fifth Annual International Conference on 'Challenges in Environmental Science & Engineering CESE 2012' Melbourne, Australia, 9–13 September 2012.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 23 Oct 2013 02:30
Last Modified: 05 Sep 2017 05:59
Uncontrolled Keywords: microalgae; Chlorella vulgaris; nutrient removal; online-monitoring; wastewater; biofuel
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090410 Water Treatment Processes
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
06 Biological Sciences > 0605 Microbiology > 060599 Microbiology not elsewhere classified
Socio-Economic Objective: D Environment > 96 Environment > 9699 Other Environment > 969999 Environment not elsewhere classified
Identification Number or DOI: 10.1080/19443994.2013.826325
URI: http://eprints.usq.edu.au/id/eprint/24106

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