Correlations between the composition of liquid fraction of full-scale digestates and process conditions
Agricultural robots; Anaerobic digestion; Biogas; Chemical equipment; Chemical oxygen demand; Crops; Fertilizers; Separation; Aromatic molecules; Hydraulic retention time; Liquid separation; Process condition; Process parameters; Separation process; Treatment and disposal; Waste activated sludges; L...
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2023
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my.uniten.dspace-263232023-05-29T17:09:05Z Correlations between the composition of liquid fraction of full-scale digestates and process conditions Akhiar A. Guilayn F. Torrijos M. Battimelli A. Shamsuddin A.H. Carr�re H. 57192410921 57063238500 6602763213 6506098955 35779071900 7003438084 Agricultural robots; Anaerobic digestion; Biogas; Chemical equipment; Chemical oxygen demand; Crops; Fertilizers; Separation; Aromatic molecules; Hydraulic retention time; Liquid separation; Process condition; Process parameters; Separation process; Treatment and disposal; Waste activated sludges; Liquids Fast development of centralized agricultural biogas plants leads to high amounts of digestate production. The treatment and disposal of liquid fractions after on-site digestate solid� liquid separation remains problematic due to their high organic, nutrient and aromatic contents. This work aims to study the variability of the remaining compounds in the digestate liquid fractions in relation to substrate origin, process parameters and solid�liquid separation techniques. Twenty-nine digestates from full-scale codigestion biogas plants and one waste activated sludge (WAS) digestate were collected and characterized. This study highlighted the combined effect of the solid�liquid separation process and the anaerobic digestion feedstock on the characteristics of liquid fractions of digestates. Two major clusters were found: (1) liquid fractions from high efficiency separation process equipment (e.g., centrifuge and others with addition of coagulant, flocculent or polymer) and (2) liquid fractions from low efficiency separation processes (e.g., screw press, vibrating screen and rotary drum), in this latter case, the concentration of chemical oxygen demand (COD) was associated with the proportion of cow manure and energy crops at biogas plant input. Finally, SUVA254, an indicator for aromatic molecule content and the stabilization of organic matter, was associated with the hydraulic retention time (HRT). � 2021 by the authors. Licensee MDPI, Basel, Switzerland. Final 2023-05-29T09:09:04Z 2023-05-29T09:09:04Z 2021 Article 10.3390/en14040971 2-s2.0-85106405244 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85106405244&doi=10.3390%2fen14040971&partnerID=40&md5=57822d1f8c143a00a2972401aa46440c https://irepository.uniten.edu.my/handle/123456789/26323 14 4 971 All Open Access, Gold, Green MDPI AG Scopus |
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Universiti Tenaga Nasional |
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| description |
Agricultural robots; Anaerobic digestion; Biogas; Chemical equipment; Chemical oxygen demand; Crops; Fertilizers; Separation; Aromatic molecules; Hydraulic retention time; Liquid separation; Process condition; Process parameters; Separation process; Treatment and disposal; Waste activated sludges; Liquids |
| author2 |
57192410921 |
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57192410921 Akhiar A. Guilayn F. Torrijos M. Battimelli A. Shamsuddin A.H. Carr�re H. |
| format |
Article |
| author |
Akhiar A. Guilayn F. Torrijos M. Battimelli A. Shamsuddin A.H. Carr�re H. |
| spellingShingle |
Akhiar A. Guilayn F. Torrijos M. Battimelli A. Shamsuddin A.H. Carr�re H. Correlations between the composition of liquid fraction of full-scale digestates and process conditions |
| author_sort |
Akhiar A. |
| title |
Correlations between the composition of liquid fraction of full-scale digestates and process conditions |
| title_short |
Correlations between the composition of liquid fraction of full-scale digestates and process conditions |
| title_full |
Correlations between the composition of liquid fraction of full-scale digestates and process conditions |
| title_fullStr |
Correlations between the composition of liquid fraction of full-scale digestates and process conditions |
| title_full_unstemmed |
Correlations between the composition of liquid fraction of full-scale digestates and process conditions |
| title_sort |
correlations between the composition of liquid fraction of full-scale digestates and process conditions |
| publisher |
MDPI AG |
| publishDate |
2023 |
| _version_ |
1806425914738737152 |
| score |
13.18916 |