In integrated purification and hydration equipment, the disinfection module plays a vital role, which is directly related to the microbial safety of purified water.
First of all, the common disinfection module selection includes ultraviolet disinfection, ozone disinfection and chemical disinfection (such as chlorine disinfection). Ultraviolet disinfection uses ultraviolet rays of a specific wavelength to irradiate the water body, destroying the DNA structure of microorganisms and making them lose their ability to reproduce and survive. Its advantages are that no chemical agents are added, no secondary pollution will occur, the disinfection process is fast and relatively energy-saving. However, it has high requirements for the transparency of the water body. If there are more suspended impurities in the water, it will affect the penetration effect of ultraviolet rays and reduce the disinfection efficiency.
Ozone disinfection kills microorganisms through the strong oxidizing property of ozone. Ozone has extremely strong oxidizing ability and can quickly decompose pathogens such as bacteria and viruses. Its disinfection effect is more thorough, and it will decompose into oxygen by itself after disinfection, without any harmful substances remaining. However, ozone preparation equipment is relatively complex and costly, and ozone itself has certain toxicity, which has certain requirements for the operating environment and personnel safety.
Chemical disinfection, such as chlorine disinfection, is a more traditional and widely used method. Chlorine can effectively kill a variety of pathogenic microorganisms, with low cost and simple operation. However, chlorine disinfection may react with organic matter in water to produce chlorinated organic matter, such as trihalomethanes, which have potential health risks and may have adverse effects on the human body if consumed for a long time.
In terms of disinfection effect analysis, multiple factors need to be considered comprehensively. For ultraviolet disinfection, parameters such as ultraviolet intensity, irradiation time, and ultraviolet transmittance of water bodies should be monitored. Generally speaking, the higher the ultraviolet intensity, the longer the irradiation time, and the clearer the water body, the better the disinfection effect. By regularly testing the total number of bacteria, Escherichia coli group and other microbial indicators in the water after disinfection, it is possible to intuitively evaluate whether the disinfection effect meets the standard.
The evaluation of ozone disinfection effect can be carried out by testing the residual amount of ozone in the water and microbial indicators. The appropriate amount of ozone added can not only ensure the disinfection effect, but also ensure that the residual amount in the water body is within a safe range. Chemical disinfection requires strict control of the dosage of the agent, and accurate calculation based on the water quality and water volume of the water source. At the same time, the residual chlorine content and the generation of chlorinated organic matter in the water after disinfection should be monitored to ensure that the water quality meets the relevant health standards.
Different application scenarios have different requirements for the selection of disinfection modules and disinfection effects. For example, in drinking water purification, the safety and residue-free requirements for disinfection are higher, and ultraviolet and ozone disinfection may have more advantages; while in some industrial water or landscape water purification, chlorine disinfection may be more popular due to its low cost and simple operation.
The selection of disinfection modules for integrated purification and hydration equipment needs to comprehensively consider multiple factors such as disinfection principle, cost, operational convenience, safety, and application scenarios, and scientific testing and evaluation methods should be used to ensure that the disinfection effect meets the corresponding water quality requirements, providing users with safe and reliable purification and water replenishment services.
