Application of nitrifying granules to improvement of nitrification activity in activated sludge process

Naohiro Kishida, Ryo Totsuka, Atsushi Kono, Mikiya Kurasawa, Motoki Ogiwara, Satoshi Tsuneda

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Nitrifying granules were used to improve nitrification performance of activated sludge process under high organic load. After inoculation of nitrifying granules, nitrification activity immediately increased, and kept for at least 70 days. Fluorescence in situ hybridisation analysis confirmed that nitrifying bacteria were retained in the granules even though nitrifying granules had been served in the organic wastewater treatment reactor for 70 days. Nitrification performance strongly depended on C/N ratio of the influent wastewater. Nitrifying granules that had been statically stored for 100 days could completely recover ammonia removal rate within 15 days after inoculation to ammonia-rich solution.

Original languageEnglish
Pages (from-to)103-111
Number of pages9
JournalInternational Journal of Environment and Waste Management
Volume7
Issue number1-2
DOIs
Publication statusPublished - 2011

Keywords

  • Aerobic granules
  • Bioaugmentation
  • Biological nitrogen removal
  • Granulation
  • Microbial immobilisation
  • Nitrification
  • Nitrifying granules
  • Wastewater treatment

ASJC Scopus subject areas

  • Environmental Engineering
  • Waste Management and Disposal

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