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Fermentation01:29

Fermentation

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PTR-ToF-MS Coupled with an Automated Sampling System and Tailored Data Analysis for Food Studies: Bioprocess Monitoring, Screening and Nose-space Analysis
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Evaluation of Arabica Coffee Fermentation Using Machine Learning.

Renata A R Rocha1, Marcelo A D da Cruz1, Lívia C F Silva1

  • 1Biotechnology Institute, University Federal of Uberlândia, Patos de Minas 38700-002, MG, Brazil.

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Summary
This summary is machine-generated.

Exploring coffee fermentation, this study reveals how post-harvest processing impacts flavor. Natural coffee (NC) processing yields more acids, enhancing sensory notes, while submerged fermentation (SMF) boosts lactic acid. Self-induced anaerobic fermentation (SIAF) diversifies coffee profiles.

Keywords:
coffee fermentationcoffee metabolitescoffee processingsensory qualityspecialty coffees

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Area of Science:

  • * Agricultural Science
  • * Food Science
  • * Biotechnology

Background:

  • * Post-harvest processing significantly influences coffee bean quality.
  • * Fermentation is a critical stage affecting coffee's chemical and sensory attributes.
  • * Understanding fermentation byproducts is key to optimizing coffee flavor profiles.

Purpose of the Study:

  • * To investigate the impact of different post-harvest processing and fermentation methods on coffee bean attributes.
  • * To analyze the chemical composition and sensory profiles of coffee produced via various self-induced anaerobic fermentation (SIAF) techniques.
  • * To identify key chemical markers influencing the sensory quality of fermented coffee.

Main Methods:

  • * Coffee fruits (Catuaí IAC-144) underwent natural coffee (NC) and pulped coffee (PC) processing.
  • * Fruits were subjected to self-induced anaerobic fermentation (SIAF) using solid-state fermentation (SSF) or submerged fermentation (SMF) with spontaneous (SPF) or starter culture (SCF) methods for 24, 48, or 72 hours.
  • * Chemical profiling, sensory analysis (Specialty Coffee Association standards), and machine learning were employed for data analysis.

Main Results:

  • * Natural coffee (NC) processing resulted in higher concentrations of citric, malic, succinic, and lactic acids compared to pulped coffee (PC).
  • * Submerged fermentation (SMF) increased lactic acid levels, whereas solid-state fermentation (SSF) elevated ethanol content.
  • * Fructose, malic acid, and succinic acid were identified as key contributors to desirable sensory notes during cupping.

Conclusions:

  • * Self-induced anaerobic fermentation (SIAF) effectively enhances the sensory quality and diversity of coffee.
  • * Post-harvest processing methods (NC vs. PC) significantly alter the chemical composition and resulting flavor profiles.
  • * Specific fermentation conditions and chemical byproducts can be leveraged to create unique and valuable coffee sensory experiences.