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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1016/j.wasman.2016.02.031
|2 doi
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|a pubmed24n0860.xml
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|a (DE-627)NLM258156163
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|a (NLM)26948667
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|a (PII)S0956-053X(16)30078-2
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Yap, S D
|e verfasserin
|4 aut
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| 245 |
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|a Pilot-scale testing of a leachbed for anaerobic digestion of livestock residues on-farm
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|c 2016
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 15.12.2016
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|a Date Revised 11.03.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2016 Elsevier Ltd. All rights reserved.
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|a A leachbed is a relatively simple anaerobic digester suitable for high-solids residues and on-farm applications. However, performance characteristics and optimal configuration of leachbeds are not well-understood. In this study, two 200 L pilot-scale leachbeds fed with spent straw bedding from pigs/swine (methane potential, B0 = 195-218 L CH4 kg(-1) VS fed) were used to assess the effects of leachate recirculation mode (trickling vs. flood-and-drain) on the digestion performance. Results showed comparable substrate solubilisation extents (30-45% of total chemical oxygen demand fed) and methane conversion (50% of the B0) for the trickling and flood-and-drain modes, indicating that digestion performance was insensitive to the mode of leachate flow. However, the flood-and-drain leachbed mobilised more particulates into the leachate than the trickling leachbed, an undesirable outcome, because these particulates were mostly non-biodegradable. Inoculation with solid residues from a previous leachbed (inoculum-to-substrate ratio of 0.22 on a VS basis) hastened the leachbed start-up, but methane recovery remained at 50% of the B0 regardless of the leachate recirculation mode. Post-digestion testing indicated that the leachbeds may have been limited by microbial activity/inhibition. The high residual methane potential of leachate from the trickling (residual Bo = 732 ± 7 L CH4 kg(-1) VS fed) and flood-and-drain leachbeds (582 ± 8 L CH4 kg(-1) VS fed) indicated an opportunity for further processing of leachate via a separate methanogenic step. Overall, a trickling leachbed appeared to be more favourable than the flood-and-drain leachbed for treating spent bedding at farm-scale due to easier operation
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Anaerobic digestion
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|a Inoculation
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|a Leachbed
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|a Manure
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|a Solid-phase
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|a Straw
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|a Manure
|2 NLM
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|a Sewage
|2 NLM
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| 650 |
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|a Methane
|2 NLM
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| 650 |
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|a OP0UW79H66
|2 NLM
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| 700 |
1 |
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|a Astals, S
|e verfasserin
|4 aut
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|a Jensen, P D
|e verfasserin
|4 aut
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|a Batstone, D J
|e verfasserin
|4 aut
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|a Tait, S
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Waste management (New York, N.Y.)
|d 1999
|g 50(2016) vom: 07. Apr., Seite 300-8
|w (DE-627)NLM098197061
|x 1879-2456
|7 nnns
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| 773 |
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|g volume:50
|g year:2016
|g day:07
|g month:04
|g pages:300-8
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|u http://dx.doi.org/10.1016/j.wasman.2016.02.031
|3 Volltext
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