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Related Experiment Videos

Microbial activity in a combined UASB-activated sludge reactor system.

J S Huang1, C S Wu, C M Chen

  • 1Department of Environmental Engineering, Kun Shan University of Technology, Tainan County 710, Taiwan, ROC. huangjsd@mail.ncku.edu.tw

Chemosphere
|November 1, 2005
PubMed
Summary

A combined upflow anaerobic sludge bed-activated sludge (UASB-AS) reactor system effectively treated piggery wastewater, removing over 95% of chemical oxygen demand and 100% of total Kjeldahl nitrogen. This system shows promise for sustainable wastewater management.

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Area of Science:

  • Environmental Microbiology
  • Wastewater Treatment Engineering
  • Bioreactor Technology

Background:

  • Piggery wastewater presents significant organic and nitrogenous pollution challenges.
  • Conventional treatment methods may not efficiently remove all pollutants.
  • Integrated bioreactor systems offer potential for enhanced pollutant removal.

Purpose of the Study:

  • To investigate the performance of a combined upflow anaerobic sludge bed-activated sludge (UASB-AS) reactor system for treating piggery wastewater.
  • To analyze the activity of nitrogen-related microbial groups within the UASB-AS system.
  • To determine optimal operational parameters for efficient organic carbon and nitrogen removal.

Main Methods:

  • Utilized a combined UASB-AS reactor system with controlled biomass wasting.

Related Experiment Videos

  • Treated pre-settled piggery wastewater characterized by high COD, TKN, and suspended solids.
  • Investigated microbial activity, including nitrification and denitrification rates, under varying granules retention time (GRT) and solids retention time (SRT).

    • Main Results:

    • The UASB-AS system achieved 95-97% COD removal and 100% TKN removal.
    • Complete nitrification occurred in the activated sludge (AS) reactor, while denitrification and methanogenesis occurred in the upflow anaerobic sludge bed (UASB) reactor.
    • Microbial activities, including specific nitrification and denitrification rates, increased with decreasing SRT and GRT.

    Conclusions:

    • The combined UASB-AS reactor system is a highly effective method for removing organic carbon and nitrogen from piggery wastewater.
    • The system promotes the development of robust granules in the UASB reactor with good settling properties.
    • Optimized GRT and SRT enhance microbial activity, making the UASB-AS system a promising alternative for sustainable piggery wastewater treatment.