| 主权项 |
1. A sulfurous acid dechlorination method of chlorinated waters to increase sulfites, prevent sulfur dioxide gassing off, and off-setting monovalent chlorides in the treated water for land application, comprising:
a. injecting sulfur dioxide (SO2) into water or wastewater to provide H+, SO2, SO3=, HSO3−, dithionous acid (H2S2O4), and other sulfur intermediate reduction products, b. adjusting the pH of the sulfur dioxide treated water with alkaline reagents to prevent gassing off of sulfur dioxide, and optimizing the presence of bisulfite and sulfite species to react with chlorine, and c. admixing the pH adjusted sulfur dioxide treated water with chlorinated waters and wastewaters for dechlorinating by the bisulfites and sulfites to produce chlorides. |
