A flowsheet is given to show the process in which the materials are removed from the water stream. The Waste Soluble Oil is hauled off site to a hazardous waste landfill, treated and disposed of. However, the Waste Acid and Waste Cyanide lines are treated in the facility. Chemicals such as sodium hydroxid, sodium hyperchlorided and sulfer dioxide are added to the stream in order to precipitate out of the solution and thereby convert from dissolved species into solid species. The two streams are mixed and then allowed to precipitate in a tank.
Aluminum sulfate is added to the contents of the tank for coagulation and flocculation to occur.
These solid species are finally separated from the liquid by gravitaional settling . The clean water is taken off the settling process. The resulting sludge is shipped off-site to a hazardous chemical landfill Inspections and Results for the Facility New York State performs monthly tests of the exit stream to consider how clean the water which being pumped back in to the river is. The amount of each contaminat in the water is measured, and must be within an allowable amount. New York State issues the arsenal a permit which allows the arsenal to discharge water to the Hudson River as long as the water has less than an allowable amount of chromium, cyanide, soluble oil, etc.