Anaerobic Biodegradation Tests of Poly(lactic acid) under Mesophilic and Thermophilic Conditions Using a New Evaluation System for Methane Fermentation in Anaerobic Sludge

Anaerobic biodegradation tests of poly(lactic acid) (PLA) powder were done at the thermophilic (55 °C) and mesophilic temperature (35 °C) under aquatic conditions [total solid concentrations of the used sludge were 2.07% (at 55 °C) and 2.24% (at 35 °C)] using a newly developed evaluation system. Wit...

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Main Authors: Hisaaki Yagi, Fumi Ninomiya, Masahiro Funabashi, Masao Kunioka
Format: Article
Language:English
Published: MDPI AG 2009-09-01
Series:International Journal of Molecular Sciences
Subjects:
Online Access:http://www.mdpi.com/1422-0067/10/9/3824/
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spelling doaj-7ddcba5b173c4db79d2421613d14ad732020-11-25T00:23:16ZengMDPI AGInternational Journal of Molecular Sciences1422-00672009-09-011093824383510.3390/ijms10093824Anaerobic Biodegradation Tests of Poly(lactic acid) under Mesophilic and Thermophilic Conditions Using a New Evaluation System for Methane Fermentation in Anaerobic SludgeHisaaki YagiFumi NinomiyaMasahiro FunabashiMasao KuniokaAnaerobic biodegradation tests of poly(lactic acid) (PLA) powder were done at the thermophilic (55 °C) and mesophilic temperature (35 °C) under aquatic conditions [total solid concentrations of the used sludge were 2.07% (at 55 °C) and 2.24% (at 35 °C)] using a newly developed evaluation system. With this system, the evolved biogas is collected in a gas sampling bag at atmospheric pressure. This method is more convenient than using a pressure transducer or inverted graduated cylinder submerged in water. PLA was degraded about 60% in 30 days, about 80% in 40 days and about 90% in 60 days at 55 °C. On the other hand, the PLA degradation started in 55 days at 35 °C and degradation rate was much slower than at 55 °C. http://www.mdpi.com/1422-0067/10/9/3824/anaerobic biodegradationpoly (lactic acid)methane fermentation
collection DOAJ
language English
format Article
sources DOAJ
author Hisaaki Yagi
Fumi Ninomiya
Masahiro Funabashi
Masao Kunioka
spellingShingle Hisaaki Yagi
Fumi Ninomiya
Masahiro Funabashi
Masao Kunioka
Anaerobic Biodegradation Tests of Poly(lactic acid) under Mesophilic and Thermophilic Conditions Using a New Evaluation System for Methane Fermentation in Anaerobic Sludge
International Journal of Molecular Sciences
anaerobic biodegradation
poly (lactic acid)
methane fermentation
author_facet Hisaaki Yagi
Fumi Ninomiya
Masahiro Funabashi
Masao Kunioka
author_sort Hisaaki Yagi
title Anaerobic Biodegradation Tests of Poly(lactic acid) under Mesophilic and Thermophilic Conditions Using a New Evaluation System for Methane Fermentation in Anaerobic Sludge
title_short Anaerobic Biodegradation Tests of Poly(lactic acid) under Mesophilic and Thermophilic Conditions Using a New Evaluation System for Methane Fermentation in Anaerobic Sludge
title_full Anaerobic Biodegradation Tests of Poly(lactic acid) under Mesophilic and Thermophilic Conditions Using a New Evaluation System for Methane Fermentation in Anaerobic Sludge
title_fullStr Anaerobic Biodegradation Tests of Poly(lactic acid) under Mesophilic and Thermophilic Conditions Using a New Evaluation System for Methane Fermentation in Anaerobic Sludge
title_full_unstemmed Anaerobic Biodegradation Tests of Poly(lactic acid) under Mesophilic and Thermophilic Conditions Using a New Evaluation System for Methane Fermentation in Anaerobic Sludge
title_sort anaerobic biodegradation tests of poly(lactic acid) under mesophilic and thermophilic conditions using a new evaluation system for methane fermentation in anaerobic sludge
publisher MDPI AG
series International Journal of Molecular Sciences
issn 1422-0067
publishDate 2009-09-01
description Anaerobic biodegradation tests of poly(lactic acid) (PLA) powder were done at the thermophilic (55 °C) and mesophilic temperature (35 °C) under aquatic conditions [total solid concentrations of the used sludge were 2.07% (at 55 °C) and 2.24% (at 35 °C)] using a newly developed evaluation system. With this system, the evolved biogas is collected in a gas sampling bag at atmospheric pressure. This method is more convenient than using a pressure transducer or inverted graduated cylinder submerged in water. PLA was degraded about 60% in 30 days, about 80% in 40 days and about 90% in 60 days at 55 °C. On the other hand, the PLA degradation started in 55 days at 35 °C and degradation rate was much slower than at 55 °C.
topic anaerobic biodegradation
poly (lactic acid)
methane fermentation
url http://www.mdpi.com/1422-0067/10/9/3824/
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AT masahirofunabashi anaerobicbiodegradationtestsofpolylacticacidundermesophilicandthermophilicconditionsusinganewevaluationsystemformethanefermentationinanaerobicsludge
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