Refinery wastewater is mainly generated during crude oil processing and refining. Refineries consume a large volume of industrial water, with scattered water consumption points. The sources and characteristics of such wastewater are closely related to multiple factors, including equipment used and water reuse. Its main sources can be categorized as follows:
1.Process Wastewater: This is primarily produced in production units, mainly from the drainage of oil-water separators in refining units. This type of wastewater accounts for approximately 50% of the COD load in the total effluent discharged from the wastewater station.
2.Oily Wastewater: It mainly originates from pump cooling water in refining units, drainage from intermediate tanks for heavy oil, crude oil-related wastewater, and ground flushing water, among others.
3.Assumed Clean Water: This category mainly includes boiler blowdown and regeneration waste liquid from pure water production units.
What pollutants are contained in the above wastewater? It mainly contains pollutants such as phenols, oil, sulfur, alkalis, acids, and salts. During the treatment of such wastewater, consideration should be given to the recovery of oil products, acids, alkalis, and other substances. Its key characteristics include large discharge volume, significant fluctuations, a wide variety of pollutants, large variations in concentration, and high toxicity.
Given this, is Monitoring Required Before Discharging Such Wastewater? Absolutely Yes!
The wastewater contains numerous harmful pollutants. Discharging it directly without disinfection and sterilization will cause severe pollution to other water bodies, posing risks to the ecological environment and human health. Therefore, it must be emphasized that all types of wastewater require Online Water Quality Monitoring prior to discharge. Monitoring is conducted to analyze the content of various indicators in the water, ensuring compliance with standards before discharge.
For refinery wastewater, monitoring the pollutant content is indispensable. In this regard, an Online Total Oil Analyzer can be used to detect the total oil content in the wastewater.
