Biogas stripping of ammonia from fresh digestate from a food waste digester
Biogas stripping of ammonia from fresh digestate from a food waste digester
The efficiency of ammonia removal from fresh source-segregated domestic food waste digestate using biogas as a stripping agent was studied in batch experiments at 35, 55 and 70 ?C, at gas flow rates of 0.125 and 0.250 Lbiogas min-1 L-1digestate with and without pH adjustment. Higher temperatures and alkaline conditions were required for effective ammonia removal, and at 35 ?C with or without pH adjustment or 55 ?C with unadjusted pH there was little or no removal. Results were compared to those from earlier studies with digestate that had been stored prior to stripping and showed that ammonia removal from fresh digestate was more difficult, with time constants 1.6 to 5.7 times higher than those previously reported. This has implications for the design of large-scale systems where continuous stripping of fresh digestate is likely to be the normal operating mode. A mass balance approach showed that thermal-alkaline stripping improved hydrolysis
ammonia removal, hydrolysis, biogas stripping, anaerobic digestion, food waste
66-75
Serna-Maza, Alba
81ce5c84-2b04-49b3-86fd-3a5a6834efc2
Heaven, S.
f25f74b6-97bd-4a18-b33b-a63084718571
Banks, C.J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
August 2015
Serna-Maza, Alba
81ce5c84-2b04-49b3-86fd-3a5a6834efc2
Heaven, S.
f25f74b6-97bd-4a18-b33b-a63084718571
Banks, C.J.
5c6c8c4b-5b25-4e37-9058-50fa8d2e926f
Serna-Maza, Alba, Heaven, S. and Banks, C.J.
(2015)
Biogas stripping of ammonia from fresh digestate from a food waste digester.
Bioresource Technology, 190, .
(doi:10.1016/j.biortech.2015.04.041).
Abstract
The efficiency of ammonia removal from fresh source-segregated domestic food waste digestate using biogas as a stripping agent was studied in batch experiments at 35, 55 and 70 ?C, at gas flow rates of 0.125 and 0.250 Lbiogas min-1 L-1digestate with and without pH adjustment. Higher temperatures and alkaline conditions were required for effective ammonia removal, and at 35 ?C with or without pH adjustment or 55 ?C with unadjusted pH there was little or no removal. Results were compared to those from earlier studies with digestate that had been stored prior to stripping and showed that ammonia removal from fresh digestate was more difficult, with time constants 1.6 to 5.7 times higher than those previously reported. This has implications for the design of large-scale systems where continuous stripping of fresh digestate is likely to be the normal operating mode. A mass balance approach showed that thermal-alkaline stripping improved hydrolysis
Text
Serna et al batch stripping 2015 - scholar text.pdf
- Accepted Manuscript
More information
Submitted date: January 2015
Accepted/In Press date: 15 April 2015
e-pub ahead of print date: 22 April 2015
Published date: August 2015
Keywords:
ammonia removal, hydrolysis, biogas stripping, anaerobic digestion, food waste
Organisations:
Water & Environmental Engineering Group
Identifiers
Local EPrints ID: 376177
URI: http://eprints.soton.ac.uk/id/eprint/376177
ISSN: 0960-8524
PURE UUID: 359d1594-4f42-44d1-8b4d-8ebee8b6f9e4
Catalogue record
Date deposited: 24 Apr 2015 13:04
Last modified: 15 Mar 2024 05:15
Export record
Altmetrics
Contributors
Author:
Alba Serna-Maza
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
