Abstract:

Ozone enhanced coagulation has been used for the advanced treatment of the secondary effluent of yeast wastewater. The results show that when the dosage of O₃ is 120 mg/L and FeCl₃ 0.5 g/L,the COD removing rate is 65.0%. Compared with the experimental results of that having the same dosages,and the process by coagulation first and then ozonation next,19.2% of COD removing rate can be increased,and 50% or more of chemical sludge yield can be decreased. Compared with the results of the process by coagulation only,more than 60% of coagulant dosage can be reduced. The wastewater treatment cost of ozone enhanced coagulation per ton is the lowest. When oxygen source is used,the treatment cost is CNY2.5/t. Compared with the treatment costs of the processes by coagulation first and ozonation next and by coagulation only,CNY0.7/t and CNY1.3/t can be reduced,respectively.

Key words: yeast wastewater, advanced treatment, ozone enhanced coagulation

摘要：

采用臭氧强化混凝的方法对酵母废水二级出水进行深度处理，结果表明，臭氧、三氯化铁投加量分别为120 mg/L、0.5 g/L时，COD去除率为65.0%，与相同投加量下先混凝后臭氧氧化的实验结果相比，COD去除率可提高19.2%，化学污泥产生量可减少50%以上；与单独混凝实验相比，可减少60%以上的混凝剂用量。臭氧强化混凝的吨水处理费用最低，采用氧气源时，吨水处理费为2.5元，分别比先混凝后臭氧氧化和单独混凝减少0.7、1.3元/t。

关键词: 酵母废水, 深度处理, 臭氧强化混凝

CLC Number: 

• X703