Shanghai and Tianjin - Proper Management of Seawater Desalination Facilities and Waste - November 2006 to Current Status in 2024
In 2006, the rapid urbanization and population growth in China's coastal cities, particularly Shanghai and Tianjin, led to the construction of seawater desalination facilities to address the serious problem of water shortages. At the facility operated by Shanghai Desalination Technology Corporation, waste water (brine) containing high concentrations of minerals such as salt, calcium, and magnesium is discharged in the process of desalinating seawater. In 2006, an attempt was made to use some of the brine generated at the facility as a raw material for cement plants and chemical fertilizer production. In 2006, the company began trials of using some of the brine generated at the facility as a raw material for cement plants and chemical fertilizer production, and 100,000 tons of concentrated water are reused annually in Tianjin, thus laying the groundwork for sustainable waste management.
In the 2020s, the number of desalination facilities further increased throughout China, with 135 desalination projects in operation at the end of 2020, with a total capacity of approximately 1.65 million tons per day. Government regulations have also been tightened, and brine emission standards have been tightened. For example, Shanghai Desalination Technology Co., Ltd. processes approximately 100,000 tons of brine per year, extracting valuable substances such as sodium chloride and magnesium to supply as raw materials for the chemical industry. Energy efficiency and the introduction of renewable energy are also being promoted, with solar power generation at the Tianjin facility reducing annual energy consumption by about 15 percent.
In this way, seawater desalination facilities along China's coast are pursuing both environmental protection and sustainable use of water resources, and efforts to reduce environmental impact and reuse waste are evolving year by year.
No comments:
Post a Comment