By 2025, the total annual water consumption in China will be controlled within 640 billion cubic meters.

The 'World Water Day' and 'China Water Week' in 2022 have just passed, and the concept of protecting water resources has become increasingly popular. It is the source of water life, the key to production and the foundation of ecology. Making good use of water resources is the meaning of accelerating the formation of a green and low-carbon production lifestyle. In recent years, China has promoted the management of total water resources, scientific allocation, overall conservation and recycling, made solid progress in the construction of a water-saving society, improved the water-saving management mechanism day by day, and achieved remarkable results in water conservation in key industries.

'The waterless biological toilet we developed and supplied to the Beijing Winter Olympics has the characteristics of waterless and flush-free, and uses scientific and technological power to help save water.' Tian Lan, chairman of Gansu Zhangye Lanbiao Biotechnology Co., Ltd. introduced that this waterless biological toilet can be used in arid and water-deficient areas, remote rural areas, tourist attractions and high-altitude areas.

In recent years, it has become a social consensus to build a water-saving society and improve the intensive, economical and safe use of water resources. How to make good use of water resources from a narrow tube and make careful use of water resources? How to promote water conservation in agriculture, industry, towns and other fields? The reporter investigated the practice and exploration in various places.

Agricultural water-saving and efficiency-increasing

Popularize water-saving irrigation technology, breed drought-tolerant varieties ... so that crops are no longer thirsty.

In March, the osmanthus base at the foot of Duantou Village, Zhoushan Town, Jinhua City, Zhejiang Province is green, and 150 mu of seedlings grow well. Xiang Jianren, deputy secretary of the village party branch, rode an electric car to inspect the shuttle. 'We started laying drip irrigation facilities the year before last, and the water and labor costs dropped, so the planting cost was saved by 10%. Water-saving equipment can also add liquid fertilizer. Through the integration of water and fertilizer, seedlings grow better and the output value has increased by 10%. '

In recent years, Jinhua City has vigorously developed water-saving projects such as sprinkler irrigation and pipeline irrigation, with an area of 1.9 million mu of water-saving irrigation; During the 'Thirteenth Five-Year Plan' period, the area of efficient water-saving irrigation reached 8.45%.

In addition, Jinhua City has innovated water management, improved the water price formation mechanism, refined the reward and compensation mechanism, and effectively improved the irrigation hardware conditions and farmers' awareness of water saving. At the same time, by further strengthening the digital application, the measured range of water consumption data in sample irrigation areas is expanded, and the measurement accuracy of irrigation water consumption is improved.

This kind of practice has spread across the country. By the end of 2020, China's water-saving irrigation area has reached 567 million mu. Among them, the area of high-efficiency water-saving irrigation such as sprinkler irrigation, micro-irrigation and pipeline irrigation has reached 350 million mu.

Back to the land in spring, in Hongqi Valley Modern Wisdom Agriculture Demonstration Park, Chongxing Town, Minqin County, Wuwei City, Gansu Province, tender cherries are covered with branches, and many tourists come together to experience rural life.

The Shiyang River Basin, where Wuwei City is located, is bordered by desert, and water resources are in short supply, which limits the local development. 'In recent years, Wuwei City has adjusted its industrial structure, and there are 2.52 million mu of farmland using efficient water-saving technologies in the city.' Ye Yongguo, director of the Water Saving Office of Wuwei Water Affairs Bureau, said, 'We strictly control the total amount and quota management of water and promote the intensive conservation and utilization of water resources.'

Ye Yongguo introduced that the local area carefully selected planting varieties, adapted water production and measured water planting, and vigorously developed advantageous characteristic industries. 'Twelve kinds of high-efficiency water-saving irrigation technologies have been popularized and applied in Hongqi Valley Park, and the water use efficiency has been greatly improved.' Ye Yongguo said.

Zhang Qingyong, deputy director of the National Water Conservation Office of the Ministry of Water Resources, believes that in areas where water resources are scarce, the total amount of agricultural water should be strictly controlled, water-saving irrigation should be vigorously promoted, high water-consuming crops should be moderately reduced, and dry farming should be accelerated; We should vigorously promote crops with low water consumption and high efficiency, and breed and popularize new varieties of drought-tolerant crops.

Industrial water saving and emission reduction

Strengthen recycling and transformation, speed up the elimination of backward production capacity ... ask for production capacity for every drop of water.

Walking into the production park of Jiangsu Bomin Electronics Co., Ltd., cooling towers, spray towers, purification towers, water coolers and other equipment stand in the midst.

'We belong to an electronic circuit manufacturing enterprise, and we adhere to the concept of water saving and reuse in the design stage, and also take water saving as an important indicator in equipment selection. The company now has a cooling water tower with a circulation capacity of 1,200 cubic meters per hour. In addition, by reasonably improving the overflow of horizontal equipment, it can save about 90,000 cubic meters of water every year. ' Speaking of industrial water-saving technology, Sheng Li, general manager of the company, called a few treasures. Through various water-saving measures, the company's water reuse rate exceeds 92%, and the indirect cooling water circulation rate exceeds 98%.

Speeding up the transformation of water resources recycling is conducive to the production capacity of every drop of water. Besides, it is also very important to promote water conservation in high water consumption industries, speed up the elimination of backward production capacity and gradually realize zero discharge of industrial wastewater.

Huadian Zibo Thermal Power Co., Ltd. belongs to the traditional high water consumption industry, and many years ago it began to explore the way of water saving. 'In the past, ash dams were filled with ash after sewage settled.' AARON Li, director of the company's planning department, recalled, 'Since the ash removal process has been improved, not only ash and ash flushing water are no longer discharged into the ash dam, but also ash has been reused.'

Since 2016, Huadian Zibo Thermal Power Co., Ltd. has successively completed the high back pressure transformation of two generating units, which can reduce the consumption of circulating water by 1.72 million tons in the heating season; Last year, 105 million yuan was invested to carry out the first-stage transformation of deeply optimized water use. At present, the system has been debugged and put into operation. According to preliminary calculation, 470,000 tons of water can be saved every year after it is put into operation.

The 14th Five-Year Plan for the Construction of Water-saving Society puts forward a clear requirement that by 2025, the total annual water consumption of the whole country should be controlled within 640 billion cubic meters, and the water consumption of 10,000 yuan GDP and 10,000 yuan industrial added value will be reduced by about 16% and 16% respectively compared with 2020.

Zhang Qingyong believes that it is necessary to promote the existing enterprises and parks to speed up the construction of water-saving and water-recycling facilities, promote the series use of water, water quality, multi-use and recycling of water among enterprises, and gradually realize the integration and optimization of water system; It is necessary to explore the establishment of 'near zero emission' industrial parks and create a number of water-saving benchmarking enterprises and parks.