Environmental protection entry test! Water saving is a "must answer"

As early as 2019, the National Development and Reform Commission and the Ministry of Water Resources jointly issued the "National Water Saving Action Plan". The goal is that by 2022, water consumption per 10,000 yuan of GDP and industrial use per 10,000 yuan of GDP will be reduced. Value-added water consumption decreased by 30% and 28% respectively compared with 2015, the effective utilization coefficient of farmland irrigation water increased to above 0.56, and the total water consumption nationwide was controlled within 670 billion cubic meters.

This year is an important node in this national water-saving action. In January, the water conservancy department took the lead in publishing the national mature and applicable water-saving technology promotion catalog (2021), focusing on recommending 40 water-saving technologies. It includes water-saving technologies in various fields such as industry, agriculture, and urban life. Use advanced scientific and technological means to break through the practical barriers to water conservation in various fields and further enhance water conservation capabilities and efficiency.

In reality, as shown in the variety show, a "rush competition" of water-saving actions is quietly going on in various fields!

Industrial water saving = wastewater reuse + recycling water system

At the end of last year, in order to promote the recycling of industrial wastewater and improve the intensive conservation of industrial water resources Utilization level, six ministries and commissions jointly issued the "Industrial Wastewater Recycling Implementation Plan". Among them, there are provisions for the duplication rate of industrial water use in different industries. For example, the paper industry must increase by more than 5% in 2025, and the petrochemical and chemical industry must increase by more than 1%.

There are two main types of industrial water saving: technical water saving and management water saving. Today we are mainly talking about technical water saving. The market performance of sewage and wastewater reuse treatment has been good in recent years. Industry insiders predict that the market size of industrial wastewater treatment may exceed 500 billion yuan in 2025. With good news about the reuse of industrial sewage and wastewater coming out, will the industrial sector become the "big brother" of water conservation in the future? In addition, clear guidance has been provided in the "Implementation Plan" for the optimization of the recycling water system, and industrial enterprises have taken a big step forward in the path of water recycling.

Agricultural water conservation = new irrigation model + smart irrigation

It has been proposed in the previously released "14th Five-Year Plan for National Agricultural Green Development Plan" ,wantStrengthen agricultural water-saving technology and ecological monitoring, improve agricultural water efficiency, and strengthen the protection of agricultural water resources.

In agriculture, irrigation water is the main source of water consumption. To promote irrigation water conservation, we must first establish an irrigation water monitoring system to deepen the degree of smart irrigation and further improve the utilization rate of water resources. Secondly, explore new irrigation models, such as drip irrigation and micro-irrigation, which have been explored so far, and have greatly contributed to water resource utilization. According to the water demand patterns of crops and local water supply conditions, we can use less water to harvest more crops. great environmental benefits.

Water saving in urban and rural areas = sponge city + public sewage treatment and recycled water utilization facilities

How to build a water resource network in urban and rural areas? The concept of sponge city construction is entering our lives. For example, the already built sponge city wetland parks, Moon Lake Park and Xingyue Lake Park in Gui'an New District, Guizhou, target ecological sponges, elastic sponges, dynamic sponges, and smart sponges, and comprehensively adopt measures such as storage, penetration, and purification to improve the city's Water conservation capacity, supplementing urban water and alleviating the problem of water shortage.

Although sponge cities are good, there is still a long way to go before they are fully completed. Judging from the development in recent years, promoting the construction of sewage treatment and recycled water utilization facilities is one of the effective ways to reap benefits in the short term. For example, Anhui, as one of the cities with water shortages, will continue to expand ways to recycle sewage. It plans to add 800,000 tons/day of new recycled water utilization facilities during the "14th Five-Year Plan" period to make full use of the waste water treated by sewage plants that meets the standards. Water is used in urban road cleaning, irrigation, and river ecological water replenishment.

In the future water-saving “rush competition”, more circles will definitely join! The national water-saving action is continuing to promote the practice of the whole society, and water resources and green development will also find the best balance point.