Abstract:

The oil-bearing wastewater has been treated by the combined process of flotation and AB method.The test shows that when the pH is adjusted to 6.5-7.8, and the polyaluminiumchlorid(PAC) dosage is 20-40 mg/L, the average removing rates of oil and COD by flotation are 70.3% and 42.6% respectively.In section A of the AB method, when HRT is 48 min, and dissolved oxygen(DO) 0.8-1.2 mg/L, COD average removing rate is 35.9%, and COD loading reaches 3.68 kg/(m³·d).In section B of the AB method, when HRT is 8.0 h, and DO 2.5-3.0 mg/L, COD average removing rate is 58.0%, and COD loading 0.36 kg/(m³·d).The effluent of the oil-bearing wastewater reaches the first class of Integrated Wastewater Discharge Standard(GB 8978—1996).

Key words: oil-bearing wastewater, flotation, AB method, organic loading

摘要：

采用浮选与AB法联合工艺处理含油污水。试验表明;调节pH为6.5～7.8, 按20～40 mg/L比例投加PAC, 浮选对油和COD的平均去除率分别为70.3%、42.6%;AB法的A段在HRT=48 min、DO为0.8～1.2 mg/L时, COD平均去除率为35.9%, COD负荷达到3.68 kg/(m³·d);B段在HRT为8.0 h、DO为2.5～3.0 mg/L时, COD的平均去除率为58.0%, COD负荷为0.36 kg/(m³·d)。处理后的出水达到《污水综合排放标准》(GB 8978—1996)的一级标准。

关键词: 含油污水, 浮选, AB法, 有机负荷

CLC Number: 

• X703.1