Publication detail

WHY POLYPHENOLS PRESENT IN SPENT COFFEE GROUNDS INHIBIT THE GROWTH OF BACTERIA PRODUCING POLYHYDROXYALKANOATES?

KOVALČÍK, A. MATOUŠKOVÁ, P. KUČERA, D. OBRUČA, S. MÁROVÁ, I.

Original Title

WHY POLYPHENOLS PRESENT IN SPENT COFFEE GROUNDS INHIBIT THE GROWTH OF BACTERIA PRODUCING POLYHYDROXYALKANOATES?

English Title

WHY POLYPHENOLS PRESENT IN SPENT COFFEE GROUNDS INHIBIT THE GROWTH OF BACTERIA PRODUCING POLYHYDROXYALKANOATES?

Type

conference paper

Language

en

Original Abstract

Our study aims at suggesting detoxification methodology, which would enable to extract phenolic compounds from spent coffee grounds (SCGs) hydrolysates to produce inhibitor-free hydrolysates. SCGs arise as a waste product through the production of instant coffee and coffee brewing. SCGs contain an oil fraction and a lignocellulosic fraction, which can be used as a carbon substrate for bacteria producing polyhydroxyalkanoates (PHA). Fermentable sugars are transformed from SCGs via chemical hydrolysis. However, SCG hydrolysates contain also phenolic compounds, which are too toxic for PHA producing bacteria and partially even completely inhibit their growth. Our results showed that the multi-stepped extractions' methodology enabled to extract phenolic compounds and produce inhibitor-free SCG hydrolysates from which may profit PHA producing bacteria. Moreover, extracted phenolics reveal high antimicrobial activity, and therefore, they can be used in numerous high-value applications.

English abstract

Our study aims at suggesting detoxification methodology, which would enable to extract phenolic compounds from spent coffee grounds (SCGs) hydrolysates to produce inhibitor-free hydrolysates. SCGs arise as a waste product through the production of instant coffee and coffee brewing. SCGs contain an oil fraction and a lignocellulosic fraction, which can be used as a carbon substrate for bacteria producing polyhydroxyalkanoates (PHA). Fermentable sugars are transformed from SCGs via chemical hydrolysis. However, SCG hydrolysates contain also phenolic compounds, which are too toxic for PHA producing bacteria and partially even completely inhibit their growth. Our results showed that the multi-stepped extractions' methodology enabled to extract phenolic compounds and produce inhibitor-free SCG hydrolysates from which may profit PHA producing bacteria. Moreover, extracted phenolics reveal high antimicrobial activity, and therefore, they can be used in numerous high-value applications.

Keywords

Bacteria; biopolymers; hydrolysis; inhibitors

Released

06.07.2018

Publisher

ETA - Florence Renewable Energies

Location

Florence, Italy

ISBN

2282-5819

Periodical

EUROPEAN BIOMASS CONFERENCE AND EXHIBITION PROCEEDINGS

Year of study

26th EUBCE

Number

2018

State

IT

Pages from

960

Pages to

964

Pages count

5

URL

Documents

BibTex


@inproceedings{BUT149091,
  author="Adriána {Kovalčík} and Petra {Matoušková} and Dan {Kučera} and Stanislav {Obruča} and Ivana {Márová}",
  title="WHY POLYPHENOLS PRESENT IN SPENT COFFEE GROUNDS INHIBIT THE GROWTH OF BACTERIA PRODUCING POLYHYDROXYALKANOATES?",
  annote="Our study aims at suggesting detoxification methodology, which would enable to extract phenolic
compounds from spent coffee grounds (SCGs) hydrolysates to produce inhibitor-free hydrolysates. SCGs arise as a waste product through the production of instant coffee and coffee brewing. SCGs contain an oil fraction and a lignocellulosic fraction, which can be used as a carbon substrate for bacteria producing polyhydroxyalkanoates (PHA). Fermentable sugars are transformed from SCGs via chemical hydrolysis. However, SCG hydrolysates contain also phenolic compounds, which are too toxic for PHA producing bacteria and partially even completely inhibit their growth. Our results showed that the multi-stepped extractions' methodology enabled to extract phenolic compounds and produce inhibitor-free SCG hydrolysates from which may profit PHA producing bacteria. Moreover, extracted phenolics reveal high antimicrobial activity, and therefore, they can be used in numerous high-value applications.",
  address="ETA - Florence Renewable Energies",
  booktitle="Papers of the 26th European Biomass Conference. Setting the course for a biobased economy. Extracted from the Proceedings of the International Conference held in Copenhagen, Denmark, 14 - 17 May 2018",
  chapter="149091",
  howpublished="online",
  institution="ETA - Florence Renewable Energies",
  number="2018",
  year="2018",
  month="july",
  pages="960--964",
  publisher="ETA - Florence Renewable Energies",
  type="conference paper"
}