Flocculation and sedimentation is a commonly used water treatment technology, by adding polyaluminum chloride, polyacrylamide and other flocculants to the water, so that the suspended solids, colloidal substances and microorganisms and other impurities in the water gather together to form flocculent precipitate, so as to achieve the purpose of purifying water quality. The functions of flocculation and sedimentation are mainly as follows:
1.Removal of suspended solids: Flocculation and sedimentation can effectively remove suspended solids in water, including sediment, dust, suspended particles, etc., and improve the transparency and clarity of water.
2.Removal of colloidal substances: Water often contains various colloidal substances, such as proteins, starches, colloidal organic matter, etc., which are difficult to remove by conventional methods. The flocculation and sedimentation method can effectively remove these colloidal substances and improve water quality.
3.Removal of microorganisms: Water often contains various microorganisms, such as bacteria, viruses, protozoa, etc., which can have adverse effects on human health. Flocculation and sedimentation can remove most microorganisms and ensure the safety of drinking water.
4.Improve water quality: Flocculation and sedimentation can improve water quality, improve the taste and smell of water, and make it more suitable for drinking and use.
5.Reducing water turbidity: The turbidity of water refers to the degree to which impurities such as suspended solids, colloidal substances and microorganisms in the water affect the transparency. Flocculation and sedimentation can effectively reduce the turbidity of water and improve the transparency of water.
6.Removal of toxic and harmful substances: Water may contain various toxic and harmful substances, such as heavy metal ions, organic pollutants, etc. Flocculation and sedimentation can remove some toxic and harmful substances and improve water quality safety.
Polyaluminum chloride and other flocculants have the advantages of simple operation, good treatment effect and low cost, so they have been widely used in industrial wastewater treatment, domestic sewage treatment, drinking water treatment and other fields.