Assessing the effects of intra-granule precipitation in a full-scale industrial anaerobic digester
(2019) In Water Science and Technology 79(7). p.1327-1337- Abstract
In this paper, a multi-scale model is used to assess the multiple mineral precipitation potential in a full-scale anaerobic granular sludge system. Reactor behaviour is analysed under different operational conditions (addition/no addition of reject water from dewatering of lime-stabilized biomass) and periods of time (short/long term). Model predictions suggest that a higher contribution of reject water promotes the risk of intra-granule CaCO3 formation as a result of the increased quantity of calcium arriving with that stream combined with strong pH gradients within the biofilm. The distribution of these precipitates depends on: (i) reactor height; and (ii) granule size. The study also exposes the potential undesirable... (More)
In this paper, a multi-scale model is used to assess the multiple mineral precipitation potential in a full-scale anaerobic granular sludge system. Reactor behaviour is analysed under different operational conditions (addition/no addition of reject water from dewatering of lime-stabilized biomass) and periods of time (short/long term). Model predictions suggest that a higher contribution of reject water promotes the risk of intra-granule CaCO3 formation as a result of the increased quantity of calcium arriving with that stream combined with strong pH gradients within the biofilm. The distribution of these precipitates depends on: (i) reactor height; and (ii) granule size. The study also exposes the potential undesirable effects of the long-term addition of reject water (a decrease in energy recovery of 20% over a 100-day period), caused by loss in biomass activity (due to microbial displacement), and the reduced buffer capacity. This demonstrates how both short-term and long-term operational conditions may affect the formation of precipitates within anaerobic granules, and how it may influence methane production and consequently energy recovery.
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- author
- Feldman, H. ; Flores-Alsina, X. ; Ramin, P. ; Kjellberg, K. ; Jeppsson, U. LU ; Batstone, D. J. LU and Gernaey, K. V. LU
- organization
- publishing date
- 2019-04-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- ADM1, Biofilm, Industrial wastewater, Multiple mineral precipitation, Physico-chemical modelling, Space competition within granules
- in
- Water Science and Technology
- volume
- 79
- issue
- 7
- pages
- 11 pages
- publisher
- IWA Publishing
- external identifiers
-
- pmid:31123232
- scopus:85066849685
- ISSN
- 0273-1223
- DOI
- 10.2166/wst.2019.129
- language
- English
- LU publication?
- yes
- id
- 11e967e9-c728-4b3a-bcb8-5b902f625fd2
- date added to LUP
- 2019-06-19 09:53:42
- date last changed
- 2024-09-04 01:18:58
@article{11e967e9-c728-4b3a-bcb8-5b902f625fd2, abstract = {{<p>In this paper, a multi-scale model is used to assess the multiple mineral precipitation potential in a full-scale anaerobic granular sludge system. Reactor behaviour is analysed under different operational conditions (addition/no addition of reject water from dewatering of lime-stabilized biomass) and periods of time (short/long term). Model predictions suggest that a higher contribution of reject water promotes the risk of intra-granule CaCO<sub>3</sub> formation as a result of the increased quantity of calcium arriving with that stream combined with strong pH gradients within the biofilm. The distribution of these precipitates depends on: (i) reactor height; and (ii) granule size. The study also exposes the potential undesirable effects of the long-term addition of reject water (a decrease in energy recovery of 20% over a 100-day period), caused by loss in biomass activity (due to microbial displacement), and the reduced buffer capacity. This demonstrates how both short-term and long-term operational conditions may affect the formation of precipitates within anaerobic granules, and how it may influence methane production and consequently energy recovery.</p>}}, author = {{Feldman, H. and Flores-Alsina, X. and Ramin, P. and Kjellberg, K. and Jeppsson, U. and Batstone, D. J. and Gernaey, K. V.}}, issn = {{0273-1223}}, keywords = {{ADM1; Biofilm; Industrial wastewater; Multiple mineral precipitation; Physico-chemical modelling; Space competition within granules}}, language = {{eng}}, month = {{04}}, number = {{7}}, pages = {{1327--1337}}, publisher = {{IWA Publishing}}, series = {{Water Science and Technology}}, title = {{Assessing the effects of intra-granule precipitation in a full-scale industrial anaerobic digester}}, url = {{http://dx.doi.org/10.2166/wst.2019.129}}, doi = {{10.2166/wst.2019.129}}, volume = {{79}}, year = {{2019}}, }