Journal article 1145 views 296 downloads
Nutrient recovery and fractionation of anaerobic digester effluents employing pilot scale membrane technology
Journal of Water Process Engineering, Volume: 31, Start page: 100846
Swansea University Authors: Darren Oatley-Radcliffe , Robert Lovitt
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DOI (Published version): 10.1016/j.jwpe.2019.100846
Abstract
Anaerobic Digester (AD) waste, known as digestate (spent anaerobically digested effluents) of agricultural origin, was collected for a feasibility study on the use of membrane filtration to fractionate phosphate and ammonia from digestate into nutrient streams. The digestate was pre-treated to remov...
Published in: | Journal of Water Process Engineering |
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ISSN: | 2214-7144 |
Published: |
2019
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Online Access: |
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URI: | https://cronfa.swan.ac.uk/Record/cronfa50288 |
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Abstract: |
Anaerobic Digester (AD) waste, known as digestate (spent anaerobically digested effluents) of agricultural origin, was collected for a feasibility study on the use of membrane filtration to fractionate phosphate and ammonia from digestate into nutrient streams. The digestate was pre-treated to remove bulk solids and then filtered using diafiltration (DF) with ultrafiltration (UF) (5.65 psi TMP) and then nanofiltration (NF) (operating pressure 253.82 psi). Having set the pre-treated effluents at pH 4.0, retention of phosphate reached 6.78 mmols L−1 during UF with lower values being achieved with repeated DF steps. In contrast, nitrogen retention was lower at 8.21 mmols L-1 and was continuously dropping at each DF step. During NF phosphorus was shown to be strongly retained by the membrane at 31.8 mmols L−1, while retention of ammonium was low at 13.4 mmols L-1 demonstrating the potential for this combination of membrane types for fractionating high value components from AD waste. |
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Keywords: |
Sludge, NF, UF, Phosphate, Nitrogen, AD |
College: |
Faculty of Science and Engineering |
Start Page: |
100846 |