Abstract The effect of substrate shock loads on the performance of anaerobic reactor for simultaneous sulfide and nitrate removal was evaluated. The response to the shock loads could be divided into disturbance, inertial and recovery periods. The effect of the shock loads on the reactor was associated with the intensity of the shock loads. The reactor performance was almost unaffected at lower intensity (1.5 times shock load), whereas it was considerably influenced at higher intensity (higher than 2.0 times shock load). The performance was recoverable from disturbance at all the tested shock loads within 30h (7.5 hydraulic retention time). The effluent sulfide concentration was a sensitive parameter, which increased up to 18 times of that at steady state; thus it was an important indicator of the reactor performance.
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Received: 03 October 2008
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