含腈废水的生物一级处理工艺

Biological Pretreatment Processes of Nitrilon Wastewater

采用好氧活性污泥法、悬浮载体膨胀床及厌氧生物反应器分别对含腈废水进行一级处理。实验结果表明,由于含腈废水的CN-毒性和难降解有机物含量高,好氧活性污泥法不适合处理含腈废水。随着活性污泥反应器运行时间的延长,污泥逐渐失去活性,大量微生物死亡。悬浮载体膨胀床处理含腈废水的效果较差,污染物去除率低于15%。厌氧生物反应器适于用作含腈废水的一级处理,污染物去除率可达到35%以上,而且可以改善水质,提高含腈废水的可生化性,有利于后续的生物处理工艺对含腈废水的深度处理。

The nitrilon wastewater was pretreated with aerobic activated sludge, suspended carrier expanded bed and anaerobic biological reactor. The results showed that the aerobic activated sludge was unfit for treating nitrilon wastewater due to its CN- toxicity and high concentration of difficult degraded organic matter. With the increase of operational time, the activity of sludge lost gradually and a lot of microbe died. The effect of suspended carrier expanded bed treating nitrilon wastewater was worse and the removal efficiency of contaminated matter was under 15%. The anaerobic biological reactor was good at treating nitrilon wastewater and the removal efficiency of contaminated matter was up to 35%. Meanwhile the wastewater quality was improved and the biochemical performance of nitrilon wastewater was enhanced, which were beneficial for advanced treatment to nitrilon wastewater by sequential biological treating processes.