Algae reactors for wastewater treatment

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dc.contributor.advisor Jefferson, Bruce
dc.contributor.advisor Villa, Raffaella Whitton, Rachel Louise 2016-08-12T10:42:21Z 2016-08-12T10:42:21Z 2016-02
dc.description.abstract The onset of the Water Framework Directive (WFD) will challenge water utilities to further reduce their wastewater phosphorus discharges to < 0.5 mg.L- 1 . Whilst conventional treatments, such as chemical dosing, are able to meet these new discharge consents, the strategies are representative of a linear economy model where resources are unrecovered and disposed. An alternative solution which can contribute to the aspiration of a circular economy is microalgae. Microalgae are ubiquitous in wastewater environments and assimilate phosphorus during their growth, to residual concentrations complementary of the WFD. Furthermore, microalgal biomass can be anaerobically digested to produce biomethane offering the potential for an energy neutral approach. However, uptake of microalgal systems are lacking in the UK through limited knowledge of operation; and the belief that such solutions are synonymous to large, shallow open ponds with extensive treatment times. The development of alternative microalgal reactors are increasingly investigated to overcome these implementation challenges. Of these, immobilised microalgae has shown great potential; and whilst within its infancy demonstrates the greatest opportunity for development and optimisation. This thesis determines the critical operational parameters that influence the remediation efficacy of immobilised microalgae for tertiary nutrient removal; including species selection, biomass concentration, treatment period and lighting; with recommendations for optimal performance. These recommendations are then applied to the design and operation of an immobilised bioreactor (IBR) to understand the key design and operating components that influence the overall economic viability. In doing so, the potential for an IBR to be economically viable, within the next decade, in comparison to traditional approaches are discussed. en_UK
dc.publisher Cranfield University en_UK
dc.rights © Cranfield University, 2016. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright holder. en_UK
dc.subject immobilisation en_UK
dc.subject phosphate en_UK
dc.subject nitrogen en_UK
dc.subject circular economy en_UK
dc.title Algae reactors for wastewater treatment en_UK
dc.type Thesis or dissertation en_UK
dc.type.qualificationlevel Doctoral en_UK
dc.type.qualificationname EngD en_UK

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