Tylosin in anaerobic reactors: degradation kinetics, effects on methane production and on the microbial community
Tylosin eliminated in animal waste, during therapeutic treatment, can be efficiently removed in anaerobic systems. The present study investigated the influence of tylosin concentration and assessed its degradation kinetics and the microorganisms involved in each stage of its anaerobic digestion (hyd...
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Published in | Biodegradation (Dordrecht) Vol. 33; no. 3; pp. 283 - 300 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Dordrecht
Springer Netherlands
01.06.2022
Springer Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Tylosin eliminated in animal waste, during therapeutic treatment, can be efficiently removed in anaerobic systems. The present study investigated the influence of tylosin concentration and assessed its degradation kinetics and the microorganisms involved in each stage of its anaerobic digestion (hydrolysis/acidogenesis; acetogenesis; methanogenesis). The results showed a stimulating effect on methane production with increasing tylosin concentration in the poultry litter up to 80 mg kg
−1
tylosin (232.9 NL CH
4
kg SV
−1
). As for tylosin degradation, greater removal of antibiotics was observed in the methanogenic phase (88%), followed by acetogenic (84%) and hydrolytic/acidogenic (76%) phases. The higher rate of tylosin degradation obtained in the methanogenic step, is mainly related to the co-metabolic effect exerted by the presence of acetate and its degradation by acetoclastic methanogens. Indeed, metagenomic analyses suggested a syntrophic action between archaea of the genus
Methanobacterium
, and bacteria such as
Clostridium
and
Flexilinea
, which seemed decisive for tylosin degradation. |
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ISSN: | 0923-9820 1572-9729 |
DOI: | 10.1007/s10532-022-09980-3 |