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Breakthroughs achieved in key technologies for the resource utilization of high-salt wastewater and near-zero emissions. Author/Source: Coal Chemistry News. Date: October 25, 2019. Clicks: 23. The Institute of Process Engineering of the Chinese Academy of Sciences, in collaboration with companies such as Ansteel Chemical Technology, Ansteel Co., Ltd., Handan Iron and Steel Company, and Beijing Saikokanglun, has developed a set of technologies and integrated processes for the reuse of coking wastewater and achievement of near-zero emissions. A technical demonstration was carried out, and on October 20, these technologies were approved in a evaluation session organized by the Chinese Society for Environmental Sciences in Beijing. The appraisal committee, chaired by Academician Wu Fengchang, unanimously agreed that this technology has reached an internationally leading level and recommended that its promotion and application be intensified. Coal chemical industry, steel manufacturing, and coking are fundamental industries in China. However, due to high investment and operating costs associated with advanced treatment technologies for coking wastewater, low rates of fresh water reuse, large volumes of concentrated wastewater discharged, and the generation of large amounts of hazardous solid waste in the form of salts, the recycling of coking wastewater and achieving near-zero emissions have become urgent technical challenges that need to be addressed for water pollution control in these industries. With the support of the major scientific and technological projects for water pollution control and treatment during the 12th and 13th Five-Year Plans, as well as various corporate-funded research initiatives, the Environmental Technology and Engineering team at the Process Engineering Institute collaborated with multiple enterprises to overcome key technical challenges in areas such as \"enhanced ozone oxidation using microbubbles and catalysis for high-salinity organic wastewater treatment,\" \"high-efficiency desalination and concentration through anti-pollution pressure/electrically driven membranes,\" and \"an integrated process for near-zero discharge of coking wastewater based on acid-base regeneration and water recycling.\" As a result, integrated technologies for the resource utilization of high-salinity wastewater and near-zero discharge, along with the first set of related equipment, were developed. These technologies were applied to the treatment of 1.1 million tons per year of coking wastewater at Ansteel’s Phase III chemical plant (at a flow rate of 50 m3/d), achieving a water recovery rate of over 90%, which meets the requirements for replenishing water in industrial circulating cooling systems ； Concentrate yield