Publication detail

Biotechnological conversion of spent coffee grounds into lactic acid

HUDEČKOVÁ, H. NEUREITER, M. OBRUČA, S. FRÜHAUF, S. MÁROVÁ, I.

Original Title

Biotechnological conversion of spent coffee grounds into lactic acid

Type

journal article in Web of Science

Language

English

Original Abstract

This work investigates the potential bioconversion of spent coffee grounds (SCG) into lactic acid (LA). SCG were hydrolysed by a combination of dilute acid treatment and subsequent application of cellulase. The SCG hydrolysate contained a considerable amount of reducing sugars (902003gl(-1), glucose; 2649 +/- 010gl(-1) galactose and 281 +/- 007gl(-1) arabinose) and it was used as a substrate for culturing several lactic acid bacteria (LAB) and LA-producing Bacillus coagulans. Among the screened micro-organisms, Lactobacillus rhamnosus CCM 1825 was identified as the most promising producer of LA on a SCG hydrolysate. Despite the inhibitory effect exerted by furfural and phenolic compounds in the medium, reasonably high LA concentrations (2569 +/- 145gl(-1)) and yields (98%) were gained. Therefore, it could be demonstrated that SCG is a promising raw material for the production of LA and could serve as a feedstock for the sustainable large-scale production of LA. Significance and Impact of the StudySpent coffee grounds (SCG) represent solid waste generated in millions of tonnes by coffee-processing industries. Their disposal represents a serious environmental problem; however, SCG could be valorized within a biorefinery concept yielding various valuable products. Herein, we suggest that SCG can be used as a complex carbon source for the lactic acid production.

Keywords

Lactic acid bacteria, fermentation, Lactobacillus, waste, biotechnology, spent coffee grounds, lactic acid

Authors

HUDEČKOVÁ, H.; NEUREITER, M.; OBRUČA, S.; FRÜHAUF, S.; MÁROVÁ, I.

Released

13. 1. 2018

ISBN

0266-8254

Periodical

LETTERS IN APPLIED MICROBIOLOGY

Year of study

66

Number

4

State

United Kingdom of Great Britain and Northern Ireland

Pages from

306

Pages to

312

Pages count

7

URL

https://onlinelibrary.wiley.com/doi/epdf/10.1111/lam.12849

BibTex

@article{BUT144640,
  author="HUDEČKOVÁ, H. and NEUREITER, M. and OBRUČA, S. and FRÜHAUF, S. and MÁROVÁ, I.",
  title="Biotechnological conversion of spent coffee grounds into lactic acid",
  journal="LETTERS IN APPLIED MICROBIOLOGY",
  year="2018",
  volume="66",
  number="4",
  pages="306--312",
  doi="10.1111/lam.12849",
  issn="0266-8254",
  url="https://onlinelibrary.wiley.com/doi/epdf/10.1111/lam.12849"
}