Entering the swimming pool of Hangzhou Olympic Sports Center, a pool of clear water reflects sparkling light. As the second largest swimming and diving center in China after the "Water Cube", the Hangzhou Olympic Sports Center Swimming Center will hold swimming, diving, and synchronized swimming competitions during the Hangzhou Asian Games. The three meter deep swimming pool and six meter deep diving pool are clear to the bottom, and the smooth bottom of the pool appears to be within reach, reflecting the "high standards and strict requirements" for water quality. Every drop of water needs to pass the seven levels before it can enter the arena of the Asian Games, "said Xu Lingchong, the director of news and publicity at the swimming pool at the Hangzhou Olympic Sports Center. With the support of a complete and efficient high-tech water circulation system, the swimming and diving pool at this Asian Games not only achieves year-round" no water change ", but also fully meets international competition standards in terms of water quality. The first two levels of the water circulation system are hair filters and diatomaceous earth filters, where suspended solids, hair, sand and other particulate matter in the water will be filtered. Diatomaceous earth, as fine as flour, can achieve a filtration accuracy of less than 2 micrometers. It can not only filter out impurities in water, but also remove parasites that cannot be killed by conventional disinfection. "Fang Tao, the operation supervisor of the swimming pool water treatment equipment at the Hangzhou Olympic Sports Center Swimming Pool, introduced that after two filtration devices, the" turbidity "of the water will be greatly reduced. Afterwards, the water flow will successively flow into the ozone reaction tank and the urea organic matter decomposition tank to complete the disinfection of the water body and the removal of organic matter. Through these two processes, microorganisms and organic compounds such as urea in the water will be killed and decomposed, further ensuring the safety and hygiene of the water body, "Fang Tao said. As a venue for the Asian Games, the swimming pool needs to maintain a constant temperature. After going through the above steps, the water flow will also flow through the hot plate and be raised to the appropriate temperature for the competition through heat exchange. Afterwards, after undergoing analysis with a multi-parameter water quality analyzer and adding an appropriate amount of sodium hypochlorite for swimming pool disinfection based on the results, a drop of water finally completed the pre competition "warm-up" process and arrived at the venue of the Asian Games. Sodium hypochlorite is produced through a specialized sodium hypochlorite generator, which is safe and environmentally friendly, "said Fang Tao. Through cyclic filtration and disinfection, the water in the swimming pool can maintain international competition standards year-round. Swimming pools are recognized as major water consumers. How can the swimming pool at the Hangzhou Olympic Sports Center turn water consumption into water saving? Our water circulation system operates 24 hours a day, and Fang Tao explained that the water circulation system continuously circulates and treats competition water through the inlet and outlet of the swimming pool wall. In addition, the circulating water pump adopts a frequency conversion treatment process, which can automatically adjust the processing speed according to needs to reduce energy consumption, saving more than 15% energy compared to conventional processes. Taking into account evaporation and the amount of water lost during the circulation process, the annual water exchange rate of the Hangzhou Olympic Center Swimming Pool is about 5%. "Fang Tao introduced that the competition pool of the Olympic Center Swimming Pool has a water storage capacity of 3750 tons. After using a water treatment system, it can save 180000 tons of water per year, equivalent to the water consumption of over 4000 people per year. (New News Agency)