【Haichuan Chemical Salary News】Sinochem builds world’s largest integrated coking wastewater treatment plant in Xiaoyi, Shanxi
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Comprehensive wastewater treatment is just as essential for coking industrial parks as the kidney system is for the human body. On April 19, reporters learned at the sewage treatment plant in Xiaoyi Economic Development Zone, Shanxi Province, that more than 90% of the construction work on the first phase of the world’s largest integrated coking wastewater treatment plant, built solely by China National Chemical Engineering Group Corporation, has been completed, and it is about to be put into operation.
This project is jointly invested by Sinochem Engineering Group Environmental Protection Company and Saiding Engineering Co., Ltd., both subsidiaries of China National Chemical Engineering Corporation, and is constructed and operated under the BOT model. The project will be constructed in two phases, with a total investment of 470 million yuan. Once completed, Phase 1 of the project will be able to treat 20,000 tons of wastewater generated by the enterprises in the park each day. Guo Haixin, chief engineer of Sinochem Engineering Group Environmental Protection Co., Ltd. and chairman of Xiaoyi Sinochem Engineering Group Environmental Protection Co., Ltd., told reporters that despite the impact of the COVID-19 pandemic, the project resumed work in early March. To date, all design work for the project has been completed, procurement is almost finished, and the overall construction progress has reached over 90%. The project is scheduled to be completed in its entirety by June 15, entering the trial operation phase, with the treatment of the first batch of coking wastewater starting in September.
The main installations of this project include: a biochemical treatment system, a reclaimed water reuse treatment system, a concentrated brine treatment system, a highly concentrated brine treatment system, and auxiliary systems. The main processing technique utilizes the patented technology of Saiding Engineering Co., Ltd. – a process based on DJM resin adsorption – and offers advantages over current advanced wastewater treatment methods used in the coal coking industry, including lower overall investment costs, higher recovery rates, and reduced operating expenses. This technology has been successfully applied in multiple coking wastewater treatment plants, and years of stable operation experience have been accumulated. Zhang Shufeng, director of the Xiaoyi Wutong Coal Chemical Industry Park, explained that the project is located in the Modern Coal Chemical New Materials Industrial Park within the Xiaoyi Economic Development Zone in Shanxi. It represents the largest project in China for the advanced treatment of coking wastewater, and it constitutes an important part of the integrated development of the park. Treatment of coking wastewater is extremely difficult, and the selection of treatment technologies is particularly important. China National Chemical Engineering Group is a large central state-owned enterprise group that leads in technology within the field of industrial engineering in China, particularly in chemical engineering. It possesses unique technical advantages in the treatment of industrial pollutants, and has advanced and mature proprietary technologies for the treatment of wastewater from coking processes. A centralized wastewater treatment plant in the industrial park will enable zero wastewater discharge across the entire area. It will also significantly reduce the environmental protection costs for coking enterprises, enhancing their competitiveness, while providing strong support for the technological upgrading of businesses within the park.
It is understood that this project focuses on treating the industrial wastewater and treated wastewater generated by various enterprises in the park, including Pengfei, Dongyi, Jinyan, Jinda, Jinhui, Jinmao, and Loujun. It plays a vital role in improving the regional water environment. It will completely address the issues related to wastewater discharge and the comprehensive utilization of waste heat resulting from the technological upgrades of the coking enterprises in the park, transforming industrial wastewater into valuable resources and thereby increasing the efficiency of water use. This will help create a modern chemical industry park in Xiaoyi Economic Development Zone that is high-end, differentiated, intelligent, and environmentally friendly, thus fostering the sustainable development of local social services. At the same time, it will serve as a model and example for the comprehensive treatment of wastewater in coking industry parks across the country.
For BOT projects, significant policy support from the local industrial park, along with strong supervision and law enforcement, is necessary.