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Innovative energy-saving and efficient technologies help achieve near-zero discharge of semi-coke wastewater. Author/Source: Chuangju Technology. Date: October 20, 2021. Clicks: 5. On October 18, the organic wastewater treatment project for the 1.2 million tons per year semi-coke production facility operated by Shenmu Calcium Carbide Group Energy Development Co., Ltd. was launched in the Jinjie High-Tech Zone of Yulin, Shaanxi. Wang Wei, chairman of Shenmu Calcium Carbide Group Co., Ltd.; Li Huangxiao, assistant to the general manager; Zhao Pengtao, another assistant to the general manager; Yang Lin, secretary of the Party committee and chairman of Sinochem Research Institute of Chemical Technology Co., Ltd.; Chen Ping, deputy general manager; Liu Dexin, assistant to the general manager; and Shang Enxia, general manager of Tianjin Chuangju Technology Co., Ltd., attended the commencement ceremony. Multiple media outlets, including China Chemical Industry News, China Energy News, Shaanxi Daily, Yulin Daily, Science and Technology Daily, and Meihua Ke, covered this event. This project is the first of its kind in China for the treatment of wastewater generated from short-process anthracite production. It was undertaken under EPC contract by Sinochem Research Institute of Chemical Technology Co., Ltd., with the key equipment being patented products from Tianjin Chuangju Technology Co., Ltd. The combination of these new technologies will enable near-zero discharge levels for wastewater from anthracite production. Wang Wei, chairman of Shenmu Calcium Carbide Company, announced the start of the project. Yang Lin, Party Secretary and General Manager of Sinochem Technology Research Institute, said that the company’s research team optimized and integrated the traditional ammonia evaporation and phenol removal process with advanced oxidation techniques for high-COD wastewater, combining chemical and biochemical methods to develop a comprehensive set of innovative technologies for treating lignite coke wastewater. That is, after oil removal and ammonia distillation for phenol removal, the lignite carbon wastewater has its suspended solids, oils, ammonia, phenols and other impurities removed, thereby reducing the levels of phenols and ammonia that are harmful to biochemical microorganisms; thereafter it enters the biochemical treatment unit to be treated to meet the required standards before being reused. “Lanchar wastewater is a type of coal chemical wastewater with a complex composition, high toxicity, and difficulty in degradation. To date, there is no mature treatment process for such wastewater in China, making it a global challenge. ”Li Huangxiao, assistant to the general manager of Shenmu Calcium Carbide Company, explained that the lignite carbon wastewater treatment facility under construction is a sub-project of the company’s 1.2 million tons per year project for the circular and comprehensive utilization of calcium carbide resources. With a total investment of 85.25 million yuan, this facility uses advanced processing technologies to treat the wastewater generated by the lignite carbon production process; all the treated wastewater is reused, thereby addressing the issue of wastewater pollution caused by lignite carbon at its source. It will serve as a model for the green and high-quality development of the lignite carbon industry. The project includes an oil removal unit for treating lignite organic wastewater at a capacity of 45 m3/h, an ammonia evaporation and phenol removal unit, as well as a biochemical treatment system with associated auxiliary facilities; completion and commissioning are expected in July 2022. Shang Enxia, general manager of Tianjin Chuangju Technology Company, said that this project employs a process involving single-tower acid and ammonia removal, single-stage extraction, solvent recovery, and solvent stripping, and it features low investment costs, low operating expenses, and a high degree of automation. The main equipment such as ammonia vaporization units, phenol removal systems, and extraction towers all utilize the company’s patented high-efficiency jet-type tray systems of the CJVP and CJST series, as well as bird’s nest-shaped grid fillers. These products offer advantages such as high mass transfer efficiency, strong resistance to clogging, large processing capacity, and ease of installation and maintenance, thereby extending the tower’s resistance to clogging to the greatest extent possible and ensuring the safe and stable operation of the system. At present, China’s annual production capacity of semi-coke is around 100 million tons, generating approximately 30 million cubic meters of wastewater each year. As **environmental regulations become increasingly stringent, finding effective ways to treat lignite coke wastewater has become an urgent issue for the industry.