Phone:
0086 28 87573647
+86 19150187139
Looking at the development history of water supply and purification processes, we can conclude that different water quality parameters correspond to different water treatment processes. Table 1 lists the different treatment methods selected for different water quality parameters.
Water quality parameters | Process composition |
Turbidity | Rapid sand filter (conventional method): flocculation, sedimentation, filtration |
Rapid sand filter (direct filtration): flocculation, filtration | |
Membrane filtration | |
Color | Flocculation/Rapid Sand Filter |
Adsorption: Granular (powdered) activated carbon; ion exchange resin | |
Oxidizing agents: ozone; chlorine; potassium permanganate; chlorine dioxide | |
Smell | Oxidizing agents: ozone; chlorine; potassium permanganate; chlorine dioxide |
Bio-activated carbon | |
Volatile organic compounds ( VOC ) | Air blow-off |
Granular activated carbon | |
Combination of two technologies (stripping and granular activated carbon) | |
Trihalomethanes and humic acid | Precursor removal: enhanced coagulation; granular activated carbon; biological activated carbon |
Removal of chlorination byproducts: granular activated carbon; air stripping | |
Organic compounds | Ion exchange resin |
Bio-activated carbon | |
Membrane filtration | |
Bacteria and viruses | Filtering (partial removal) |
Disinfection (inactivation): Chlorine; Chlorine dioxide; Chloramine; Ozone |
As shown in the table above, rapid sand filtration combined with coagulation is the most common treatment method in water treatment. However, adding pre-oxidation and adsorption, or their combined use, to conventional treatment processes is the main way to solve the current water source pollution problem. In addition, biological pretreatment technology has begun to be applied in my country. The newly proposed membrane filtration technology is a promising water purification technology for the future.
