By selecting sodium sulfite as dechlorinating agent, photobacteria method was used to investigate the effect of dechlorination on reduction of biotoxication incurred by residual chlorine.

• 选取亚硫酸钠为脱氯剂,利用发光细菌法考察了脱氯作用对降低由余氯引起的生物毒性的效果。