Coke is fuel with a high carbon content and few impurities. It is made by subjecting coal to extremely high temperatures in airtight spaces, then “quenching,” or cooling the resulting coke. The water used to quench the coke accumulates impurities that have been released by the coal. Characteristics of the highly toxic and carcinogenic wastewater from coke production facilities include, but are not limited to:
- TDS including salts.
A coke plant producing 340 tons of coke per hour generates 0.3 m3 per ton to 4 m3 per ton 102 m3 to 1,360 m3 of wastewater per hour. This can be as much as 11,913,600 m3 per year depending on the production schedule, coal used, and other factors. It is not possible to store or safely discard this volume of wastewater.