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Dewatering of POME digestate using lignosulfonate driven forward osmosis

Daniel Johnson, Ang Wei Lun, Abdul Wahab Mohammad, Nidal Hilal

Separation and purification technology, Volume: 235, Issue: 116151

Swansea University Author: Nidal Hilal

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DOI (Published version): 10.1016/j.seppur.2019.116151

Abstract

High demand for palm oil results in the production of huge quantities of palm oil mill effluent (POME) wastewater containing a high amount of organics. Currently, this is often processed by anaerobic fermentation, but the waste water still requires further processing. Dewatering of POME digestate co...

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Published in: Separation and purification technology
ISSN: 1383-5866
Published: 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa52219
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first_indexed 2019-10-02T14:22:43Z
last_indexed 2019-10-16T14:26:15Z
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spelling 2019-10-16T09:31:12.2430894 v2 52219 2019-10-02 Dewatering of POME digestate using lignosulfonate driven forward osmosis 3acba771241d878c8e35ff464aec0342 Nidal Hilal Nidal Hilal true false 2019-10-02 FGSEN High demand for palm oil results in the production of huge quantities of palm oil mill effluent (POME) wastewater containing a high amount of organics. Currently, this is often processed by anaerobic fermentation, but the waste water still requires further processing. Dewatering of POME digestate could simultaneously recover nutrients for use as organic fertiliser and treat water sufficiently to allow other uses. This work investigates the feasibility of using a forward osmosis (FO) process driven by lignosulfonate draw solutions. It was found that water fluxes for pure water and simulated POME digestate feeds were lower for lignosulfonates than NaCl as draw solutes, but had much lower reverse solute fluxes. Reverse solute flux is of great importance for dewatering of POME digestate, as concentration of salts in the dewatered feed will preclude their use as organic fertilisers. Na lignosulfonate showed both higher water fluxes and lower reverse solute flux than the Ca lignosulfonate. Water fluxes when using the simulated POME digestate were lower than predicted from the directly measured osmotic pressures of the solutions, suggesting increased membrane resistance due to fouling or concentration polarisation effects. In addition, osmotic pressures of organic solutions were measured directly from dead-end filtration measurements. This showed that the relationship between osmolality measured from freezing point depression measurements and osmotic pressure of solutions varies for different solutes, suggesting that osmolality measurements do not give a reliable measure of osmotic pressure when comparing different organic solutions. Journal Article Separation and purification technology 235 116151 1383-5866 Forward osmosis, palm oil mill effluent, POME dewatering, membrane technology, lignosulfonate 18 3 2020 2020-03-18 10.1016/j.seppur.2019.116151 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2019-10-16T09:31:12.2430894 2019-10-02T04:46:43.8733909 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Daniel Johnson 1 Ang Wei Lun 2 Abdul Wahab Mohammad 3 Nidal Hilal 4 0052219-09102019155556.pdf johnson2019.pdf 2019-10-09T15:55:56.9830000 Output 1444341 application/pdf Accepted Manuscript true 2020-10-02T00:00:00.0000000 false eng
title Dewatering of POME digestate using lignosulfonate driven forward osmosis
spellingShingle Dewatering of POME digestate using lignosulfonate driven forward osmosis
Nidal Hilal
title_short Dewatering of POME digestate using lignosulfonate driven forward osmosis
title_full Dewatering of POME digestate using lignosulfonate driven forward osmosis
title_fullStr Dewatering of POME digestate using lignosulfonate driven forward osmosis
title_full_unstemmed Dewatering of POME digestate using lignosulfonate driven forward osmosis
title_sort Dewatering of POME digestate using lignosulfonate driven forward osmosis
author_id_str_mv 3acba771241d878c8e35ff464aec0342
author_id_fullname_str_mv 3acba771241d878c8e35ff464aec0342_***_Nidal Hilal
author Nidal Hilal
author2 Daniel Johnson
Ang Wei Lun
Abdul Wahab Mohammad
Nidal Hilal
format Journal article
container_title Separation and purification technology
container_volume 235
container_issue 116151
publishDate 2020
institution Swansea University
issn 1383-5866
doi_str_mv 10.1016/j.seppur.2019.116151
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description High demand for palm oil results in the production of huge quantities of palm oil mill effluent (POME) wastewater containing a high amount of organics. Currently, this is often processed by anaerobic fermentation, but the waste water still requires further processing. Dewatering of POME digestate could simultaneously recover nutrients for use as organic fertiliser and treat water sufficiently to allow other uses. This work investigates the feasibility of using a forward osmosis (FO) process driven by lignosulfonate draw solutions. It was found that water fluxes for pure water and simulated POME digestate feeds were lower for lignosulfonates than NaCl as draw solutes, but had much lower reverse solute fluxes. Reverse solute flux is of great importance for dewatering of POME digestate, as concentration of salts in the dewatered feed will preclude their use as organic fertilisers. Na lignosulfonate showed both higher water fluxes and lower reverse solute flux than the Ca lignosulfonate. Water fluxes when using the simulated POME digestate were lower than predicted from the directly measured osmotic pressures of the solutions, suggesting increased membrane resistance due to fouling or concentration polarisation effects. In addition, osmotic pressures of organic solutions were measured directly from dead-end filtration measurements. This showed that the relationship between osmolality measured from freezing point depression measurements and osmotic pressure of solutions varies for different solutes, suggesting that osmolality measurements do not give a reliable measure of osmotic pressure when comparing different organic solutions.
published_date 2020-03-18T04:04:27Z
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score 11.013507

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