spectrophotometer in the visible wave length (360-700nm) range. physico-chemical parameters of bleach liquor ph, biological oxygen demand (bod), chemical oxygen demand (cod) and phenol content of the bleach liquor were estimated using standard methods. ( standard methods for the examination of water and waste...
spectrophotometer in the visible wave length (360-700nm) range. physico-chemical parameters of bleach liquor ph, biological oxygen demand (bod), chemical oxygen demand (cod) and phenol content of the bleach liquor were estimated using standard methods. ( standard methods for the examination of water and waste...