1. The advantage of using ion exchange resin is that the initial investment is small and the space occupied is small, but the disadvantage is that frequent ion regeneration is required. The regeneration time is longer, which affects the water used in the subsequent production process, and the regeneration consumes a lot of acid and alkali, which is harmful to the environment. Certain damage.
2. The second-stage reverse osmosis treatment process is adopted, which is characterized by higher investment cost than ion exchange and stable effluent quality. The water quality can meet the requirements of the Chinese Pharmacopoeia and the European Pharmacopoeia, but the effluent quality cannot meet the requirements of the US Pharmacopoeia.
3. The two-stage reverse osmosis + EDI treatment process is adopted, which is characterized by stable effluent water quality, which can meet the requirements of the pharmacopoeias of various countries for purified water. The disadvantage is that the initial investment is too expensive compared to the above two methods.