CAJ | 학술논문

采用污泥回流增加污水浊度的方法提高低浊度采油污水絮凝效果和沉降速度。实验结果表明：延长油田某采油厂低浊度采油污水在污泥回流量为20 mL/L、聚合氯化铝投加量为20 mg/L、聚丙烯酰胺投加量为0.7 mg/L、加药时间间隔为10 s条件下，采油污水絮凝沉降时间比没有污泥回流絮凝沉降时间缩短2/3以上，采油污水中含油量由72.8 mg/L降至2.4 mg/L，固体悬浮物由28.6 mg/L降至8.3 mg/L，絮凝沉降处理效果良好。
채용오니회류증가오수탁도적방법제고저탁도채유오수서응효과화침강속도。실험결과표명：연장유전모채유엄저탁도채유오수재오니회류량위20 mL/L、취합록화려투가량위20 mg/L、취병희선알투가량위0.7 mg/L、가약시간간격위10 s조건하，채유오수서응침강시간비몰유오니회류서응침강시간축단2/3이상，채유오수중함유량유72.8 mg/L강지2.4 mg/L，고체현부물유28.6 mg/L강지8.3 mg/L，서응침강처리효과량호。
The method of return sludge has been used for increasing the turbidity of wastewater,so as to improve the flocculation effect and settling velocity of the low-turbidity oil production wastewater. The results show that the opti-mal conditions are as follows:the return sludge amount of the low-turbidity oil production wastewater in an oil pro-duction plant in Yanchang Oilfield is 20 mL/L,dosage of polyaluminium chloride 20 mg/L,dosage of PAM 0.7 mg/L, and dosing interval 10 s. Two third of the flocculation-settling time of oil production sludge is shortened ,compared with that without return sludge,the oil content can be reduced from 72.8 mg/L to 2.4 mg/L,and suspended solid con-tent can be reduced from 28.6 mg/L to 8.3 mg/L,the effect of flocculation-settling is good.