Concentration of organic acid from fermented food wastes using a MF/RO process

Jin Woo Lee, Jong Oh Kim, Jong Tae Jung

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

The amount of food waste has been increasing every year. Food waste takes relativity high portion of domestic waste and we have much difficulty in treating it. Most of food wastes are landfilled or incinerated after drying for the reduction of water content. The operation cost of the landfill and the incineration are very high. To solve the landfill and the incineration problems in recent years, the recycling of food waste was used by the methods of turning food waste into animal food and fertilizer. Food wastes are compatible to be used as feedstock of the fermentation because they contain valuable nutrients. Among these situations, organic acids, which are effectively used in a variety of industrial processes, can be considered to be a high cost value-added products. The purpose of this study is to evaluate the possibility of organic acid concentration using a MF/RO system. A MF/RO system was believed to be an effective one for the concentration of organic acid from food waste. Water quality of fermentation broth, MF permeate and RO retentate in terms of conductivity, pH, electric conductivity, TS (Total solids), TDS (Total dissolved solids), CODcr concentration, chloride ion concentration was examined as analytic items. pH of fermentation broth was higher than that of MF permeate and RO retentate due to the concentration of organic acid. pH of RO retentate was about 4. Conductivity, TDS, CODcr and chloride ion of RO retentate were about 1.3, 1.3, 2.9, 4.5 times higher than that of fermentation broth, respectively and TS reduced about 0.8 times. This may be ascribed to separate effectively the solid-liquid separation by MF and RO rejection. Consequently, a MF/RO system is believed to be applicable for the concentration of organic acid from fermentation broth of food waste.

Original languageEnglish
Title of host publicationEco-Materials Processing and Design IX - Selected, peer reviewed papers from 9th International Symposium on Eco-Materials Processing and Design
PublisherTrans Tech Publications Ltd
Pages281-284
Number of pages4
ISBN (Electronic)978-0-87849-360-9
DOIs
StatePublished - 2008
Externally publishedYes
Event9th International Symposium on Eco-Materials Processing and Design - Changwon City, Korea, Republic of
Duration: 2008 Jan 72008 Jan 9

Publication series

NameMaterials Science Forum
Volume569
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other9th International Symposium on Eco-Materials Processing and Design
Country/TerritoryKorea, Republic of
CityChangwon City
Period08/01/708/01/9

Keywords

  • Acid fermentation
  • Concentration
  • Micro-filtration
  • Organic acid
  • Reverse osmosis

Fingerprint

Dive into the research topics of 'Concentration of organic acid from fermented food wastes using a MF/RO process'. Together they form a unique fingerprint.

Cite this