Wastewater from several thermal cracking plants is pretreated to remove aromatic oil prior to its discharge to the company's wastewater treatment system. The characteristically hazardous oil was previously burned for fuel value in the company's boilers. The oil is now being recycled to another thermal processing plant as a substitute for a commercial chemical product. This project has reduced the amount of hazardous waste being burned for fuel.
This project involved process development work in order to determine that the oil could be substitute for a commercial chemical product in another process while still maintaining product quality in the process.
Generation of hazardous waste burned for fuel value was reduced by 1.9 million gallons per year.
Details of Reductions
Additional Information :
Savings due to reduced purchased of commercial product less cost of additional natural gas to replace oil for fuel were approximately $ 800,000 per year.