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Tytuł:
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The effect of substituting energy crop with agricultural waste on the dynamics of bacterial communities in a two-stage anaerobic digester.
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Autorzy:
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Bellucci M; Istituto Superiore per la Protezione e la Ricerca Ambientale (ISPRA), Rome, 00144, Italy.
Borruso L; Faculty of Science and Technology, Free University of Bolzano-Bozen, Piazza Università 1, 39100, Bolzano-Bozen, Italy.
Piergiacomo F; Faculty of Science and Technology, Free University of Bolzano-Bozen, Piazza Università 1, 39100, Bolzano-Bozen, Italy.
Brusetti L; Faculty of Science and Technology, Free University of Bolzano-Bozen, Piazza Università 1, 39100, Bolzano-Bozen, Italy.
Beneduce L; Department of Agriculture, Food, Natural Resources and Engineering (DAFNE), University of Foggia, Via Napoli 25, 71122, Foggia, Italy. Electronic address: .
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Źródło:
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Chemosphere [Chemosphere] 2022 May; Vol. 294, pp. 133776. Date of Electronic Publication: 2022 Jan 28.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: Oxford : Elsevier Science Ltd
Original Publication: Oxford, New York, : Pergamon Press.
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MeSH Terms:
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Bioreactors*/microbiology
Manure*
Anaerobiosis ; Bacteria ; Bacteria, Anaerobic ; Biofuels ; Methane
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Contributed Indexing:
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Keywords: Agricultural waste; Bacterial dynamics; Lactic acid bacteria; Sulfate-reducing bacteria; Syntrophic acetate-oxidizing bacteria; Two-stage anaerobic digestion
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Substance Nomenclature:
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0 (Biofuels)
0 (Manure)
OP0UW79H66 (Methane)
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Entry Date(s):
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Date Created: 20220130 Date Completed: 20220308 Latest Revision: 20220308
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Update Code:
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20240105
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DOI:
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10.1016/j.chemosphere.2022.133776
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PMID:
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35093420
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The replacement of energy crops with agricultural waste in biogas production through anaerobic digestion (AD) is both an environmentally sustainable and economically profitable strategy. However, the change of feeding mix in AD might result in nutrient imbalance or increase of the ammonium concentration, negatively affecting the activity of the microbes responsible for the process. In the present study the structure and dynamics of the bacterial communities of a full-scale two-stage AD plant, composed of a hydrolysis/acidogenesis (H) and an acetogenesis/methanogenesis (M) tanks, was monitored during feedstock substitution. Energy crop (triticale) was replaced by poultry manure litter and olive mill pomace. The increase percentage of poultry manure litter (up to 8.6%) and olive mill pomace (up to 30.5%) in the recipe incremented the total solids (up to 21% in H) and, consequently, the nitrogen content in the digestate (6.7 g N/kg in the solid fraction in H and 4-5 g NH 4 + -N/L in the liquid fraction). This favored the growth of Lactococcus sp. with consequent increment of lactate production (∼ 1 mg L -1 last two days of the survey) and the establishment of Weissella and Lactobacillus spp. Syntrophic acetate-oxidizers, including Syntrophaceticus (6% ± 1.7%), were detected manly in M but were negatively affected by the addition of the poultry manure litter, while the sulfate-reducing bacteria correlated with the variations of the volatile fatty acids. Planctomycetes putatively capable of anammox process were also found in the H during the first two days of the survey and accounted for 0.3 ± 0.01% of the total bacterial community. The stability of the process during feedstock change is the result of the shift of bacterial populations of different functional groups that showed peculiar adaptation patterns in the two stages of the plant.
(Copyright © 2022 Elsevier Ltd. All rights reserved.)
