臭氧氧化深度处理木薯酒精废水的实验研究

EXPERIMENTAL STUDY OF ADVANCED TREATMENT OF CASSAVA ALCOHOL WASTEWATER BY O_3 OXIDATION

采用O3/H2O2协同氧化处理木薯酒精废水,主要考察了反应时间、初始p H值、H2O2投加量、H2O2投加方式对木薯酒精废水处理效率的影响。实验结果表明:O3/H2O2协同氧化木薯酒精废水的最佳运行参数为:反应时间为40 min,初始p H为4,H2O2投加量为60 mg/L,平均分4次进行投加,臭氧投加量为197.5mg/L。在最佳实验条件下,废水中ρ(COD)由147.3 mg/L降低至37.2 mg/L,去除率为74.7%,UV254由1.789降低至0.079,去除率为95.6%,O3/H2O2协同氧化能够有效实现木薯酒精废水的深度处理,出水调节p H后主要指标均达到GB 27631—2011《发酵酒精和白酒工业水污染物排放标准》直接排放标准。

O3/ H2O2 synergistic oxidation was adopted to treat the cassava alcohol wastewater. Various affecting factors,including reaction time,initial p H,H2O2 dosage and H2O2 adding modes,were investigated. Experimental results showed that the optimal effects were achieved when retention time was 40 minutes,initial p H was 4,H2O2 dosage was 60 mg / L,H2O2 was divided into average four dosing,and O3 dosage was 197. 5 mg / L. Under the optimal condition,the removal efficiency of COD was 74. 7% which dropped from 147. 3 mg / L to 37. 2 mg / L,the corresponding removal efficiency of UV254 was 95. 6% which dropped from 1. 789 to 0. 079. The advanced treatment of cassava alcohol wastewater can be achieved by O3/ H2O2 synergistic oxidation effectively. The main indexes of the effluent after p H adjustment can meet the 'Direct Emissions Standard of Sdischarge Standard of Water Pollutants for Fermentation Alcohol and Distilled Spirits Industry'( GB 27631—2011).