基质浓度冲击对同步厌氧生物脱氮除硫反应器性能的影响

采用上流式厌氧污泥床(UASB)反应器研究了基质浓度冲击对同步厌氧生物脱氮除硫反应器性能的影响.根据反应器性能对基质浓度冲击的响应特征,可将基质浓度冲击过程分为冲击期、惯性期和恢复期3个阶段.基质浓度的冲击效应与冲击强度有关.冲击强度较低(1.5倍以下的基质浓度冲击)时,反应器性能所受的影响较小;冲击强度较高(2.0倍以上的基质浓度冲击)时,反应器性能所受的影响较大,出水pH值及基质浓度显著升高.在所试验的冲击强度范围内,反应器性能受扰后均可恢复稳态,恢复时间均小于30h(7.5HRT).出水硫化物浓度对基质浓度冲击的响应较为灵敏,其受扰时的浓度值可高达10.13mg /L,为受冲击前稳定运行时的18倍,可用作反应器性能变化的指示参数.

The effect of shock loads on performance of anaerobic reactor for simultaneous sulfide and nitrate removal

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.