Sewage sludge addition to food waste synergistically enhances hydrogen fermentation performance

Dong Hoon Kim, Sang Hyou Kim, Hyun Woo Kim, Mi Sun Kim, Hang Sik Shin

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

The effect of sewage sludge (SWS) addition on the H 2 fermentation of food waste (FW) was investigated. It was found that a slight addition of SWS (10:1=FW:SWS on a COD basis) significantly enhanced the H 2 fermentation performance, not only increasing the total amount of H 2 produced but accelerating the whole reaction, shortening the lag period, and increasing the H 2 production rate. Substrate degradation and microbial germination were also facilitated by SWS addition. A simple calculation reveals that the increased amount of H 2 production derived mostly from FW, indicating that SWS addition synergistically enhanced H 2 fermentation performance. This was attributed to the existence of Fe and Ca at much higher concentrations in the SWS compared to the FW. The batch process treating a mixture of FW and SWS was repeated and showed an average H 2 yield of 2.11±0.20mol H 2/mol hexose added, which was 13% higher than that of FW treated alone.

Original languageEnglish
Pages (from-to)8501-8506
Number of pages6
JournalBioresource technology
Volume102
Issue number18
DOIs
Publication statusPublished - 2011 Sep

All Science Journal Classification (ASJC) codes

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

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