Full-Scale Implementation of the Sodium Sulfide/Ferrous Sulfate Treatment Process.

摘要

In Phase I, jar and dynamic testing showed that the sodium sulfide/ferrous sulfate process was a viable method for reducing hexavalent chromium and removing heavy metals from the Tinker AFB industrial wastewater with a significant decrease in sludge production and treatment costs. In Phase II pilot-plant field verification studies were conducted to evaluate the chemical and physical parameters of the chromium reduction process, the precipitation and clarification process, and the activated sludge system. Sludge production was evaluated and compared to the sulfuric acid/sulfur dioxide/lime process. The impact of and procedure for change-over to the sodium sulfide/ferrous sulfate process were also investigated. Metals treatment, Chromium reduction, Sulfide treatment, Metals removal, Industrial wastewater, Sludge reduction, Hazardous waste minimization. (jes)