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Anaerobic digestion of organic solid wastes: process behaviour in transient conditions

Anaerobic digestion of organic solid wastes: process behaviour in transient conditions
Anaerobic digestion of organic solid wastes: process behaviour in transient conditions
This paper presents the study of the variations of the process parameters during transient conditions when substrates with different biodegradability were fed to a pilot-scale anaerobic digester. The two substrates used in the experiments were the mechanically selected organic fraction of municipal solid wastes and a blend of mechanically selected and separately collected organic fraction of municipal solid wastes. Two transient conditions were studied: the mesophilic-thermophilic passage and the increase of the organic loading rate in thermophilic conditions. It was shown that enhanced fractions of biodegradable substrates determined a greater perturbation of the system and needed longer time to reach a new stable condition. The volatile fatty acids concentration and their indirect measure, alkalinity determined upon pH 4, was the more useful parameter to understand the process behaviour because of its sensitivity to the process variations.
0273-1223
1-8
Bolzonella, D
554b33d4-ce6f-4d05-93ac-fcc5d49187f3
Battistoni, P
05bd4392-6721-4365-a826-df1171a4a74a
Mata-Alvarez, J
6e64d899-c386-4160-b7c3-d9909f289c4d
Cecchi, F
97cd0131-4631-48fe-8242-c9b9fb04b0ad
Bolzonella, D
554b33d4-ce6f-4d05-93ac-fcc5d49187f3
Battistoni, P
05bd4392-6721-4365-a826-df1171a4a74a
Mata-Alvarez, J
6e64d899-c386-4160-b7c3-d9909f289c4d
Cecchi, F
97cd0131-4631-48fe-8242-c9b9fb04b0ad

Bolzonella, D, Battistoni, P, Mata-Alvarez, J and Cecchi, F (2003) Anaerobic digestion of organic solid wastes: process behaviour in transient conditions. Water Science & Technology, 48 (4), 1-8.

Record type: Article

Abstract

This paper presents the study of the variations of the process parameters during transient conditions when substrates with different biodegradability were fed to a pilot-scale anaerobic digester. The two substrates used in the experiments were the mechanically selected organic fraction of municipal solid wastes and a blend of mechanically selected and separately collected organic fraction of municipal solid wastes. Two transient conditions were studied: the mesophilic-thermophilic passage and the increase of the organic loading rate in thermophilic conditions. It was shown that enhanced fractions of biodegradable substrates determined a greater perturbation of the system and needed longer time to reach a new stable condition. The volatile fatty acids concentration and their indirect measure, alkalinity determined upon pH 4, was the more useful parameter to understand the process behaviour because of its sensitivity to the process variations.

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Published date: 2003

Identifiers

Local EPrints ID: 189039
URI: https://eprints.soton.ac.uk/id/eprint/189039
ISSN: 0273-1223
PURE UUID: 353551d0-19c9-4158-b4a2-c950ae422cb8

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Date deposited: 31 May 2011 13:54
Last modified: 18 Jul 2017 11:41

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Contributors

Author: D Bolzonella
Author: P Battistoni
Author: J Mata-Alvarez
Author: F Cecchi

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