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In the future, water treatment will revolve around the innovation of science and technology to the direction of low energy consumption, high efficiency and resource utilization. The main manifestation is the progress of bio-treatment and membrane separation technology. Bio-treatment of wastewater has the advantages of low operating costs, simple operation and management. In recent years, the pure oxygen aeration biological fluidized bed technology developed on the traditional biochemical treatment technology of rural drinking water equipment has kept a higher unit volume in the treatment process. The microbial biomass, nutrient and metabolite mass transfer speed is accelerated, which greatly improves the treatment efficiency and load shock resistance, and the stability of the treatment process is significantly improved.

Industrial circulating water treatment is to add chemicals to the water - water treatment chemicals for school drinking water equipment. The water treatment chemicals contain corrosion inhibitors, which can control corrosion and protect equipment; scale inhibitors, which can prevent scaling; biocides, which can prevent microorganisms and algae from forming. In industrial cooling circulating water system and refrigerant water system, various water treatment agents, such as corrosion inhibitor, scale inhibitor, dispersant and bactericide, are often added to stabilize scaling ions in water. The principle is to stabilize calcium and magnesium ions through chelating, complexing ultrapure water treatment equipment and adsorption and dispersion. It is soluble in water and has good dispersing effect on colloids such as iron oxide and silica. The formation of water-insoluble or water-insoluble protective film on metal surface hinders the hydration reaction or dissolved oxygen reaction of metal ions and inhibits the corrosion reaction. This method is currently the most widely used method in industrial circulating water treatment and central air conditioning water treatment, and also the most widely used and technologically mature method in industrial water treatment. Practice has proved that it is an effective and economical method.

Water quality analysis is an effective method to ensure the good effect of industrial circulating water treatment. Strictly according to the water quality management objectives stipulated in this key point, the qualified rate of its indicators is more than 90%. Chemical analysis provides an indirect method for monitoring corrosion and scaling, determining the content of total iron in supplementary water and circulating water, and finding out from it. Regular changes, combined with other monitoring methods, can also understand the whole industrial circulating water treatment system corrosion. Control the pH and total alkalinity of industrial circulating water treatment system and control the corrosion situation. The monitoring of scaling can infer the scaling trend of the system through the chemical analysis of scaling ions and the determination of the change of Ca2+ concentration in the circulating water at the inlet and outlet of the water cooler.

Because a large number of enterprises have not matched the relevant water treatment equipment, wasted water resources have become the main culprit of environmental hazards. The untreated wastewater is discharged into the environment day by day, which makes the original self-healing ecological environment unable to withstand the pressure, and ultimately affects the human itself. Especially in big polluted cities, if enterprises do not install filter equipment, then water pollution problem will be difficult to solve.

Water environment problem is an important issue to be solved urgently in environmental protection. "It is related to human survival and sustainable development! Solving water environment problem" requires first of all strict legal system and standardized management system, "furthermore, advanced technology, economic and reasonable water treatment technology!" Water treatment is becoming increasingly prominent with the global water environment problem. In China, due to the late start of environmental protection, the weak foundation of national economy and the low level of basic industry, there is a lack of supporting policies and management measures. Therefore, water treatment in China should strengthen the research of basic science and related disciplines. The relevant experience of developed countries "and in accordance with China's current development status" to implement the strategic policy of sustainable development of environmental protection "take the road of water treatment with Chinese characteristics!"

Author: Hangzhou Water Shield Technology Co., Ltd.

Website: http://www.zjhzsd.com/

Key words: rural drinking water equipment, school drinking water equipment, ultra-pure water treatment equipment