Performance evaluation of the sulfur-redox-reaction-activated up-flow anaerobic sludge blanket and down-flow hanging sponge anaerobic/anoxic sequencing batch reactor system for municipal sewage treatment

Masashi Hatamoto, Kota Ohtsuki, Namita Maharjan, Shinya Ono, Kazuya Dehama, Kenichi Sakamoto, Masanobu Takahashi, Takashi Yamaguchi

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    A sulfur-redox-reaction-activated up-flow anaerobic sludge blanket (UASB) and down-flow hanging sponge (DHS) system, combined with an anaerobic/anoxic sequencing batch reactor (A2SBR), has been used for municipal sewage treatment for over 2years. The present system achieved a removal rate of 95±14% for BOD, 74±22% for total nitrogen, and 78±25% for total phosphorus, including low water temperature conditions. Sludge conversion rates during the operational period were 0.016 and 0.218g-VSSg-COD-removed-1 for the UASB, and DHS, respectively, which are similar to a conventional UASB-DHS system, which is not used of sulfur-redox-reaction, for sewage treatment. Using the sulfur-redox reaction made advanced treatment of municipal wastewater with minimal sludge generation possible, even in winter. Furthermore, the occurrence of a unique phenomenon, known as the anaerobic sulfur oxidation reaction, was confirmed in the UASB reactor under the winter season.

    Original languageEnglish
    Pages (from-to)171-176
    Number of pages6
    JournalBioresource Technology
    Volume204
    DOIs
    Publication statusPublished - 2016 Mar 1

    Keywords

    • Anaerobic sulfur oxidation
    • Denitrification
    • Low excess sludge
    • Phosphorus removal

    ASJC Scopus subject areas

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

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