written 8.5 years ago by |
Hot lime soda process is preferred over cold lime soda process due to following reasons like-
1- Hot lime soda process is carried out at high temperature (95-100°C) ,whereas cold lime soda process is carried out at room temperature (25-30°C).
2- Hot lime soda is a rapid process, but cold lime soda is slow process.
3-No coagulant is required here, in cold lime soda process coagulant is necessary.
4-In hot lime soda process filtration is easy as viscosity of water is low, but in cold process filtration is not easy.
5-Residual hardness is 15—30 ppm in hot lime soda process, whereas Residual hardness is 60 ppm in cold lime soda process.
6-. Dissolved gases are removed in hot lime soda process and it has high softening capacity, as compared to cold lime soda process.