Waste water recycling system analysis

Sampling analysis during this project identified more than 1000 tons/year of soil entering the refinery s underground drainage system. Once there, the solid tends to become oil coated, deposit as sludge in the oil/water separator, and must be handled as listed hazardous waste. At Yorktown, most hazardous waste sludges are recycled to the refinery s coker where hydrocarbons are converted into usable liquid and solid products. A small amount of soil components remains in the coke product. 

---