Stillage reflux in food waste ethanol fermentation and its by-product accumulation

Hongzhi Ma, Jian Yang, Yan Jia, Qunhui Wang, Yukihiro Tashiro, Kenji Sonomoto

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Raw materials and pollution control are key issues for the ethanol fermentation industry. To address these concerns, food waste was selected as fermentation substrate, and stillage reflux was carried out in this study. Reflux was used seven times during fermentation. Corresponding ethanol and reducing sugar were detected. Accumulation of by-products, such as organic acid, sodium chloride, and glycerol, was investigated. Lactic acid was observed to accumulate up to 120 g/L, and sodium chloride reached 0.14 mol/L. Other by-products did not accumulate. The first five cycles of reflux increased ethanol concentration, which prolonged fermentation time. Further increases in reflux time negatively influenced ethanol fermentation. Single-factor analysis with lactic acid and sodium chloride demonstrated that both factors affected ethanol fermentation, but lactic acid induced more effects.

Original languageEnglish
Pages (from-to)254-258
Number of pages5
JournalBioresource Technology
Volume209
DOIs
Publication statusPublished - Jun 1 2016

Fingerprint

Fermentation
fermentation
Byproducts
ethanol
Ethanol
food
Sodium chloride
Lactic acid
sodium chloride
Sodium Chloride
Lactic Acid
acid
Pollution control
Organic acids
Factor analysis
Glycerol
organic acid
Sugars
pollution control
factor analysis

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

Cite this

Stillage reflux in food waste ethanol fermentation and its by-product accumulation. / Ma, Hongzhi; Yang, Jian; Jia, Yan; Wang, Qunhui; Tashiro, Yukihiro; Sonomoto, Kenji.

In: Bioresource Technology, Vol. 209, 01.06.2016, p. 254-258.

Research output: Contribution to journalArticle

Ma, Hongzhi ; Yang, Jian ; Jia, Yan ; Wang, Qunhui ; Tashiro, Yukihiro ; Sonomoto, Kenji. / Stillage reflux in food waste ethanol fermentation and its by-product accumulation. In: Bioresource Technology. 2016 ; Vol. 209. pp. 254-258.
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