Advanced sewage treatment with ozone under excess sludge reduction, disinfection and removal of EDCs

Hiroshi Tsuno, Kiyomi Arakawa, Yasuhiro Kato, Hideaki Nagare

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A new advanced treatment system, which consists of biological nutrient removal process combined with reduction of excess sludge by ozonation and phosphorus recovery by crystallization and polishing-up ozonation process, was developed based on the fundamental studies and demonstrated by the demonstration plant set in AICHI EXPO 2005. Reduction of withdrawn excess sludge by 90% and phosphorus recovery by 70% were accomplished without any adverse effects on biological nutrient removal. The concentrations of SS, BOD, T-P and T-N in the effluent were less than 1.0, 3.0, 0.5 and 10 mg/L, respectively. EDCs were reduced to almost undetectable level and 2-log disinfection of Bacillus subtilis was established. The energy amount required for the operation was saved by 40% when compared with a conventional system to get the same level of water quality.

Original languageEnglish
Pages (from-to)238-245
Number of pages8
JournalOzone: Science and Engineering
Volume30
Issue number3
DOIs
Publication statusPublished - May 2008
Externally publishedYes

Fingerprint

Sewage treatment
Ozonization
Disinfection
Ozone
Sewage sludge
sewage treatment
disinfection
Phosphorus
Nutrients
sludge
ozone
phosphorus
Recovery
Biochemical oxygen demand
Bacilli
Crystallization
Polishing
Water quality
Effluents
crystallization

Keywords

  • Advanced Sewage Treatment
  • Disinfection
  • Endocrine Disrupting Chemicals
  • Excess Sludge
  • Ozone

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry

Cite this

Advanced sewage treatment with ozone under excess sludge reduction, disinfection and removal of EDCs. / Tsuno, Hiroshi; Arakawa, Kiyomi; Kato, Yasuhiro; Nagare, Hideaki.

In: Ozone: Science and Engineering, Vol. 30, No. 3, 05.2008, p. 238-245.

Research output: Contribution to journalArticle

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