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Bio-prospecting and growth of Macroalgae on Anaerobic Digestion Piggery Effluent (ADPE)

Moheimani, N.R.ORCID: 0000-0003-2310-4147, Nwoba, E.G.ORCID: 0000-0003-0397-2369, Owen, B.M., Pluske, J.R.ORCID: 0000-0002-7194-2164 and Huisman, J.M. (2016) Bio-prospecting and growth of Macroalgae on Anaerobic Digestion Piggery Effluent (ADPE). Pork CRC/Australian Government. Dept. of Industry, Innovation and Science

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Abstract

Anaerobic digestion piggery effluent (ADPE) has high ammonium content (toxic to most organisms) and is very turbid. The environmental consequences of high productivity piggeries is significant and can result in negative environmental impacts, hence bioremediation techniques (in particular using macroalgae) are therefore of great interest. In this study, we evaluated the growth potential of several locally isolated macroalgae in ADPE under outdoor climatic conditions and investigated their nutrient removal rates and biochemical composition. A consortium of two macroalgae, Rhizoclonium sp. and Ulothrix sp. was isolated and could efficiently grow in the ADPE with concentration of up to 248.4 mg NH3. N L-1. Macroalgal consortium growth could not be maintained at higher ADPE concentration. Maximum ammonium removal rate (30.6 ± 6.50 mg NH4+-NL-1d-1) was achieved at ADPE concentration equivalent to 248.4 mgNH4+-NL-1. Mean biomass productivity of 31.1 ± 1.14 g AFDW m-2d-1 was attained. Total carbohydrate and protein contents ranged from between 42.8-54.8 and 43.4-45.0% (ash-free dry weight), respectively, while total lipid content was very low. Our findings highlight the potential use and promise of Rhizoclonium and Ulothrix sp. consortium for the bioremediation of ADPE and biomass production. To the best of author’s knowledge, this is the first study evaluating the potential of using macroalgae to treat ADPE. While there is a need for further optimisation, successful macro algae growth on ADPE indicates the potential of using these organisms for not only treating ADPE but also as a potential source of animal feed or bioenergy production.

Item Type: Report
Murdoch Affiliation(s): School of Veterinary and Life Sciences
Algae R&D Centre
Series Name: Report prepared for the Co-operative Research Centre for High Integrity Australian Pork; 4A-107
Publisher: Pork CRC/Australian Government. Dept. of Industry, Innovation and Science
Publisher's Website: http://porkcrc.com.au/wp-content/uploads/2016/10/F...
Other Information: Final Report
URI: http://researchrepository.murdoch.edu.au/id/eprint/60417
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