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Assessing the effec...
Assessing the effects of intra-granule precipitation in a full-scale industrial anaerobic digester
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- Feldman, H. (author)
- Technical University of Denmark
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- Flores-Alsina, X. (author)
- Technical University of Denmark
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- Ramin, P. (author)
- Technical University of Denmark
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- Kjellberg, K. (author)
- Novozymes A/S
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- Jeppsson, U. (author)
- Lund University,Lunds universitet,Industriell elektroteknik och automation,Institutionen för biomedicinsk teknik,Institutioner vid LTH,Lunds Tekniska Högskola,Industrial Electrical Engineering and Automation,Department of Biomedical Engineering,Departments at LTH,Faculty of Engineering, LTH
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- Batstone, D. J. (author)
- University of Queensland
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- Gernaey, K. V. (author)
- Technical University of Denmark
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(creator_code:org_t)
- 2019-04-11
- 2019
- English 11 s.
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In: Water Science and Technology. - : IWA Publishing. - 0273-1223 .- 1996-9732. ; 79:7, s. 1327-1337
- Related links:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.2...
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Abstract
Subject headings
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- 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Miljöbioteknik -- Vattenbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Biotechnology -- Water Treatment (hsv//eng)
Keyword
- ADM1
- Biofilm
- Industrial wastewater
- Multiple mineral precipitation
- Physico-chemical modelling
- Space competition within granules
Publication and Content Type
- art (subject category)
- ref (subject category)
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