Phosphorus recovery from process waste water made by the hydrothermal carbonisation of spent coffee grounds
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Crossley, Oliver, Thorpe, Rex, Peus, Dominik and Lee, Judy (2020) Phosphorus recovery from process waste water made by the hydrothermal carbonisation of spent coffee grounds Bioresource Technology, 301, 122664.
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Corrected manuscript 17.12.19.docx - Accepted version Manuscript Restricted to Repository staff only until 24 December 2021. Download (4MB) |
Official URL: https://doi.org/10.1016/j.biortech.2019.122664
Abstract
This study investigates the recovery of phosphorus from the process water obtained through hydrothermal carbonisation (HTC) of a ‘wet’ biomass waste, namely spent coffee grounds. HTC was shown to liberate more than 82% of the total phosphorus in the grounds in the form of dissolved ortho-phosphate. Nanofiltration was used to concentrate the inorganic nutrients of the HTC process water, achieving a mass concentration factor of 3.9 times. The natural stoichiometry of phosphorus, magnesium and ammoniacal nitrogen in the nanofiltration retentate was favourable for struvite precipitation. 92.8% of aqueous phosphorus was recovered as struvite through simple pH adjustment, yielding a total phosphorus recovery of 75% from the feedstock spent coffee grounds.
| Item Type: | Article | |||||||||||||||
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| Divisions : | Faculty of Engineering and Physical Sciences > Chemical and Process Engineering | |||||||||||||||
| Authors : |
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| Date : | April 2020 | |||||||||||||||
| Funders : | Engineering and Physical Sciences Research Council (EPSRC), Antaco UK Ltd. | |||||||||||||||
| DOI : | 10.1016/j.biortech.2019.122664 | |||||||||||||||
| Copyright Disclaimer : | © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | |||||||||||||||
| Uncontrolled Keywords : | Hydrothermal carbonisation; Nanofiltration; Phosphate Recovery | |||||||||||||||
| Depositing User : | James Marshall | |||||||||||||||
| Date Deposited : | 30 Jan 2020 15:44 | |||||||||||||||
| Last Modified : | 24 Apr 2020 13:19 | |||||||||||||||
| URI: | http://epubs.surrey.ac.uk/id/eprint/853509 |
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