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Domestically leading short-process treatment technology for the resource utilization of semi-coke wastewater. Author/Source: Shaanxi Petrochemical News. Date: December 12, 2022. Clicks: 23. On December 8, the short-process treatment technology for the recycling and resource utilization of semi-coke wastewater developed by Jiangsu Wardkey Environmental Protection Technology Co., Ltd. passed the evaluation of scientific and technological achievements organized by the Shaanxi Petroleum and Chemical Industry Federation in Xi’an. The appraisal committee, headed by Li Wenhong, a professor at the School of Chemical Engineering at Northwest University, believes that this technology is at the leading level in China and recommends accelerating its industrialization and widespread application. Li Zuqiang, general manager of Wardkey Company, explained that this technology consists of three core processes: denitrification, separation of Reorganization components, and advanced treatment. The “in-situ pH denitrification” technology and a negative-pressure jet denitrification tower specifically designed for wastewater with high ammonia nitrogen levels were invented, achieving an ammonia nitrogen removal rate of over 99%. It also employs advanced water treatment technologies using membrane separation, rather than traditional biochemical treatment methods. The treated purified water not only meets or exceeds the coking quenching standards, but also enables the classified separation and recovery of pollutants such as ammonia nitrogen, tar, fly ash, and complex organic compounds present in the lignite coke wastewater, yielding by-products such as concentrated ammonia water and concentrated heavy-component mixtures. An efficient and energy-saving technology and device for the separation of heavy components have been developed. The recovered heavy-component by-products have a high calorific value; the concentrate of these heavy components can be mixed with fly ash to be used as fuel, thus offering value and enabling resource utilization. At the same time, the operation of this device requires only steam and electricity; it features a short process flow, low investment and operating costs, as well as minimal space requirements, resulting in significant social and economic benefits. In March 2022, Wardkey Company built an industrial demonstration facility in Northwest Chemical Co., Ltd. in Yulin, Shaanxi Province, capable of treating 48 tons per day of lignite coke wastewater through a short-process recycling system, aimed at processing the lignite coke wastewater generated by the company’s coking plant. The results of the on-site evaluation by experts showed that the device operates at full capacity, with the water production parameters meeting the design requirements and satisfying the criteria for quenching coke with lignite. According to third-party testing, the COD level of the lump charcoal wastewater fed into the facility was 30,025 mg/L, ammonia nitrogen at 1,830 mg/L, volatile phenols at 2,399 mg/L, and petroleum compounds at 241.5 mg/L. After treatment, the values were only 36.25 mg/L respectively for ammonia nitrogen, 9.07 mg/L, 6.52 mg/L for volatile phenols, and 0.26 mg/L for petroleum compounds. It is understood that Wardkai Company, as a **high-tech enterprise specialized in the treatment of industrial wastewater with high ammonia nitrogen levels and complex characteristics, as well as its resource recovery, has, through years of collaborative research with domestic universities, overcome key technical challenges such as the efficient recovery of ammonia nitrogen and the removal and recovery of phenols from wastewater. It has obtained over 40 patent-related achievements, which are widely applied in fields such as coal chemistry, metallurgy, rare earths, pharmaceuticals, textiles, and new materials. Through further technical integration, the \"short-process treatment technology for the resource recovery and recycling of lignite coke wastewater\" was successfully developed. Lantern coal wastewater refers to the wastewater generated during the medium- and low-temperature carbonization process of coal. It mainly contains difficult-to-degrade and highly toxic pollutants such as ammonia nitrogen, benzene derivatives, phenols, and polycyclic aromatic hydrocarbons, resulting in a complex composition that makes treatment challenging. Currently, the treatment of lignite coke wastewater at home and abroad mainly relies on methods such as physical-chemical treatment and biological treatment, but these approaches face challenges such as difficulty in completely eliminating pollution, high investment costs, and elevated operating expenses.