Effect of fermentation liquid from food waste as a carbon source for enhancing denitrification in wastewater treatment

Yongmei Zhang, Xiaochang C. Wang, Zhe Cheng, Yuyou Li, Jialing Tang

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

Food wastes were used for anaerobic fermentation to prepare carbon sources for enhancing nitrogen removal in wastewater treatment. Under anaerobic conditions without pH adjustment, the fermentation liquid from food wastes (FLFW) with a high organic acid content was produced at room temperature (25 °C) and initial solid concentration of 13%. Using FLFW as the sole carbon source of artificial wastewater for biological treatment by sequence batch operation, maximized denitrification (with a denitrification rate of VDN = 12.89mg/gVSS h and a denitrification potential of PDN = 0.174 gN/gCOD) could be achieved at a COD/TN ratio of 6. The readily biodegradable fraction in the FLFW was evaluated as 58.35%. By comparing FLFW with glucose and sodium acetate, two commonly used chemical carbon sources, FLFW showed a denitrification result similar to sodium acetate but much better than glucose in terms of total nitrogen removal, VDN, PDN, organic matter consumption rate (VCOD) and heterotrophy anoxic yield coefficient (YH).

Original languageEnglish
Pages (from-to)689-696
Number of pages8
JournalChemosphere
Volume144
DOIs
Publication statusPublished - 2016 Feb 1

Keywords

  • Anaerobic fermentation
  • Carbon source
  • Denitrification potential
  • Denitrification rate
  • Food waste

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

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