Use and protection of water resources in China
Res: Time:2013-04-09 Count:1455
With population growth, urbanization, industrialization and irrigation increasing demand for water, the 21st century will be many water shortage problems. In the case of limited fresh water available, should take active measures to protect valuable resources. Generally take the following measures.
Reduce industrial water consumption, improve water reuse
The main way to reduce industrial water production water reform process, for less water, improve water recycling rate. Such as steelworks converter with oxygen instead of old-fashioned open hearth, not only improves the quality of steel, and water consumption reduced 86-90%
Now many of the world industrially developed countries have to improve industrial repetition rate of water as a solution to the primary means of urban water problems. Some countries also laid specifically for industrial circulating water pipes, with good results. Country in recent years, water reuse gradually unfolded. In some particularly tense city water, water reuse has reached a higher level, such as Dalian, 79.5%, 77.3%, Qingdao, Taiyuan 83.8%, but the overall level is still relatively low, the average of the average industrial water reuse rate of 20-30%. If the average national industrial water recycling rate from the current 20% to 40%. Saving 13 million tons per day, the corresponding savings in water project investment 2.6 billion yuan, water saving and economic benefits are considerable.
Recycling of urban sewage, open a second water source
Europe and other countries from a long-term water management to realize that universal city sewer, large-scale construction of urban sewage treatment plant, widely used in water reuse treatment technologies, recycling and reuse of waste water, in some cities, water recycling centers and even through three water treatment slow sand filtration plant wastewater is, after disinfection of the toilet for flushing high-rise building, so that it becomes available resources is another way to improve efficiency in the use of water.