Water treatment agent analysis

Natural mineral wastewater treatment agent is a new product made from composite aluminosilicate non-metallic minerals as the main raw material through a special technical process. It is essentially different from chemically synthesized water treatment agents. It exists in both slurry and powder forms. It is acidic in nature, with a pH of 3～4. The slurry has a specific gravity of 1.5～1.6, and the powder has a specific gravity of 1.2～1.3. The color is gray to dark gray.

1. Flocculant properties

The molecular formula of the flocculant is +CH2-CHn, which is a linear high molecular polymer with a molecular weight between 4 million and 20 million. The flocculant enables the highly efficient mixed bacterial flora separated from urban domestic sewage with flocculation and degradation functions to treat domestic sewage, ensuring a high removal rate of COD and BOD in the sewage.

2. Corrosion inhibitor and scale inhibitor properties

Corrosion inhibitors and scale inhibitors, as their name suggests, are water treatment agents that alleviate scaling and corrosion in circulating water equipment such as boilers. This agent is made of alkaline substances and organic compounds, and contains corrosion inhibitors to prevent corrosion of the heating surface. The alkaline substances in the agent react chemically in the boiler with calcium and magnesium salts in the water to form water slag, which precipitates and is discharged from the boiler through the blowdown function, reducing the concentration of calcium and magnesium ions in the water and preventing the formation of scale in the boiler.

3. Cleaning agent properties

A cleaning agent is a volatile solvent that can dissolve penetrant and is used to remove excess penetrant from the surface of the inspected workpiece. Some cleaning agents are specifically designed to remove metal hydroxides, calcium carbonate, and other similar deposits from the surface of polyamide, polysulfone, and thin-film component membranes. Before using the cleaning agent, check the cleaning tank, pipelines, and safety filters, and install new filter cartridges.

4. Bactericide

As the name suggests, a bactericide is an agent that kills bacteria and other harmful microorganisms. Internationally, it is generally used as a general term for agents that prevent and control various pathogenic microorganisms. Bactericides do not pose the risks to the system that bromine, iodine, and peroxides do.

Common technologies

1. Sterilization and disinfection

Water disinfection methods can be divided into chemical and physical methods. Physical disinfection methods include heating, ultraviolet radiation, and ultrasonic methods; chemical methods include chlorination, ozonation, heavy metal ion methods, and other oxidant methods.

2. Magnetization

The use of magnetic field effects to treat water is called water magnetization treatment.

3. Precision filtration technology

Microporous filter cartridges and membranes made of special materials are used to retain particles and bacteria in the water by using their uniform pore size, preventing them from passing through the filter cartridge or membrane and removing them. Precision filtration can filter micrometer (μm) or nanometer (nm) particles and bacteria. It is also widely used in the deep treatment of water.

4. Ultrafiltration technology

Ultrafiltration is a membrane separation technology. Under a fixed pressure (pressure 0.07-0.7Mpa, maximum not exceeding 1.05Mpa), water flows on the membrane surface. Water and dissolved salts and other electrolytes are tiny particles that can penetrate the ultrafiltration membrane, while larger molecules and colloids are blocked by the ultrafiltration membrane, thus separating some of the particles in the water. The pore size of the ultrafiltration membrane is determined by a retention test using substances with a fixed molecular weight and is expressed by the molecular weight value.

5. Ozone

Ozone is a blue gas with a special fishy smell at room temperature, with the molecular formula O3. Ozone is an allotrope of oxygen. At room temperature, it can decompose into single oxygen atoms, which have strong oxidizing properties. Ozone can oxidize and denature the proteins of bacteria and fungi, rendering electrolytes ineffective. It can kill bacterial vegetative cells and spores, viruses, and fungi, and can destroy botulinum toxin. It can remove and kill toxic substances and bacteria in the air, water, and food, remove odors, and is widely used in the disinfection and sterilization processes of food production. In the disinfection and sterilization process, ozone only produces non-toxic oxides, and excess ozone is eventually reduced to oxygen, leaving no residue on the disinfected items, so it can be directly used for food disinfection and sterilization.

6. Ion exchange

Ion exchange is an equal charge reaction between ions in water and ions on ion exchange resin. The ion exchange reaction process can be exemplified by the exchange reaction process of H+-type cation exchange resin HR and Na+ in water: HR+Na+=Na++H+. As shown in the above equation, in the ion exchange reaction, the cations (such as Na) in the water are transferred to the resin, while an exchangeable H on the ion exchange resin is transferred into the water. The process of Na transferring from water to resin is the ion displacement process. The process of H on the resin exchanging to water is called the liberation process. Therefore, as a result of the liberation and displacement processes, Na and H exchange positions, and this change is called ion exchange.

7. Ultraviolet radiation

When a mercury lamp is lit, it emits ultraviolet radiation with a wavelength of 1400nm-4900nm (1nm=10-10m). This light can penetrate the cell walls of bacteria and kill microorganisms, achieving the purpose of disinfection and sterilization. The wavelength of ultraviolet radiation is around 2600nm. Ultraviolet disinfection is mainly used for small-scale drinking water treatment. Its characteristics are: strong sterilization ability, short contact time; simple equipment, convenient operation and management, the treated water is colorless, odorless, and non-toxic; no chloride ions are added during sterilization.

8. Adsorption water purification technology

This primarily refers to adsorption technology using materials with adsorption capabilities, such as activated carbon. Here, we will briefly introduce some characteristics of activated carbon: Activated carbon is widely used in the purification, dehydrogenation, oil removal, and deodorization of drinking water and industrial water in the food, chemical, and power industries. Typically, it can remove 63%-86% of colloidal substances; about 50% of iron; and 47%-60% of organic substances.