动态混合曝气-微电解预处理维生素B1生产废水

Pretreatment of wastewater from vitamin B1 production by dynamic mixing aeration micro-electrolysis process

维生素B1生产废水具有有机污染物浓度高、色度大、水量冲击大和可生化性差等特点。为了减轻后续生化处理的压力,提出了动态混合曝气-微电解工艺进行预处理,通过单因素对比试验考察了各因素对出水效果的影响,得出最佳控制参数为:进水pH值为5,曝气时间为2 h,铁碳体积比为0.5,气水比为200,充水比为0.5,混凝体积比为5。TOC(原水52 120 mg/L)和色度(原水为1 000倍)去除率分别达到34.9%和44%,为后续生化处理奠定了坚实的基础。

Wastewater from vitamin B1 factory has characteristics of high concentration, bad biochemical degradability, many chrominance substance and hardly be biochemical treated. In order to reduce latter biochemical removal＇ s pressure, dynamic mixing aeration micro-electrolysis process is proposed, kinds of effects are taken into account. The best controlling parameters are gained by contrasting effect factors one by one, these factors in separately are as follows ： inlet pH is 5, aeration time is two hours, volume ratio of Fe and C, ratio of gas and water, water filling ratio and volume ratio of coagulating are 0.5,200,0.5, and 5 respectively. Removal rates of TOC（ wastewater＇ s TOC is 52 120 mg/L） and chromaticity（ wastewater＇ s chromaticit is 1 000 times） are 34.9% and 44% respectively,it lays a stable foundation for latter biochemical treatment.