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Related Experiment Videos

[Start-up of full-scale UASB reactors].

J Wu1, F Sheng, Z Lu

  • 1Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. wj914@263.net

Huan Jing Ke Xue= Huanjing Kexue
|January 5, 2002
PubMed
Summary
This summary is machine-generated.

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Starting up Upflow Anaerobic Sludge Blanket (UASB) reactors in alternating mesophilic and thermophilic conditions effectively treats citric acid wastewater, achieving high efficiencies despite seasonal climate changes.

Area of Science:

  • Environmental microbiology
  • Wastewater treatment technologies
  • Anaerobic digestion

Context:

  • High-temperature citric acid wastewater presents treatment challenges.
  • Seasonal climate variations necessitate adaptable bioreactor operation.
  • Upflow Anaerobic Sludge Blanket (UASB) reactors are employed for industrial wastewater treatment.

Purpose:

  • To investigate the feasibility of starting up full-scale UASB reactors by alternating between mesophilic and thermophilic temperature ranges.
  • To evaluate the treatment efficiency of UASB reactors under these alternating conditions.
  • To characterize the mesophilic and thermophilic granular sludge formed during the start-up process.

Summary:

  • UASB reactors were successfully started up by alternating between mesophilic (30-37°C) and thermophilic (44-45°C) ranges, adapting to seasonal climate shifts.

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  • Total treatment efficiencies ranged from 77%-86% in the mesophilic phase, 84%-93% in the thermophilic phase, and 82%-96% upon re-adaptation to mesophilic conditions.
  • The study details the operational performance and granular sludge characteristics during this alternating temperature start-up strategy.

    • Impact:

    • Demonstrates a robust and adaptable strategy for initiating UASB reactor operations in environments with fluctuating temperatures.
    • Highlights the potential for high wastewater treatment efficiency using alternating mesophilic and thermophilic conditions.
    • Provides insights into the behavior and characteristics of granular sludge under dynamic temperature regimes, crucial for optimizing anaerobic digestion processes.