Ambient temperature SNAD process treating anaerobic digester liquor of swine wastewater

Achlesh Daverey, Nien Tzu Hung, Kasturi Dutta, Jih-Gaw Lin*

*Corresponding author for this work

Research output: Contribution to journalArticle

58 Scopus citations


In present study, effluent from anaerobic digestion of swine wastewater was treated by the simultaneous partial nitrification, anaerobic ammonium oxidation and denitrification (SNAD) process using a lab scale 5. L sequencing batch reactor (SBR) under ambient temperature. The fluctuation of anaerobic digester liquor quality (COD, 387 ± 145. mg/L; TKN, 662 ± 190 mg/L; NH4+-N, 519 ± 134 mg/L) and temperature created difficulties to develop a stable SNAD process in the SBR (days 1-285). Fed batch feeding strategy was adopted to have a stable condition in the reactor and overcome the negative effects of organic nitrogen. The average total nitrogen, NH4+-N and COD removal efficiencies in the SBR under steady state conditions (days 485-523) were 80%, 96% and 76%, respectively. The results showed that presence of organic nitrogen, mode of feeding and reactor temperature affects the SNAD process.

Original languageEnglish
Pages (from-to)191-198
Number of pages8
JournalBioresource Technology
StatePublished - 1 Jan 2013


  • Anammox
  • Fed batch
  • Nitrogen removal
  • Organic nitrogen
  • Swine wastewater

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