低温厌氧处理低浓度废水研究进展

Progress in anaerobic treatment of low strength wastewater under psychrophilic conditions

对低温下厌氧处理低浓度废水的最新进展进行了较全面综述。高效厌氧反应器为这一发展提供了可能。首选反应器是膨胀颗粒污泥床 (EGSB)反应器。若废水中颗粒有机物含量较高 ,采用两级系统 (两个EGSB ,水解上流式污泥床(HUSB)反应器 +EGSB ,上流式厌氧污泥床 (UASB)反应器 +EGSB等 )处理效果较好。新兴的厌氧膜生物反应器也是该领域的一个发展方向。低温 ( 3— 12℃ )、低浓度 (COD <10 0 0mg L)废水中培养的嗜温种泥保持令人满意的产甲烷活性。其最佳代谢温度仍在中温范围 ( 30— 40℃ ) ,表明主要菌群仍是嗜温菌。

The latest progress in the research of psychrophilic anaerobic treatment of low strength wastewater was reviewed. It was feasible and attractive to use high-rate anaerobic reactors. EGSB was the first selected reactor. When treating wastewater with a large particulate organic fraction, it may be advantageous to apply a two-stage anaerobic process, such as two-module EGSB,HUSB+EGSB,UASB+EGSB and so on. Newly developed anaerobic membrane bioreactor showed potential for wastewater treatment. At psychrophilic temperature the mesophilic seed sludge incubated by low strength wastewater retained the satisfactory development of the methanogenic activity. The assessed temperature response curves of the psychrophilically grown sludge(3-12℃) still revealed a clear optimum temperature in the mesophilic range (30-40℃).