Ordos City is located in the middle and upper reaches of the Yellow River, in the hinterland of the "Several Bends" of the Yellow River. It is the prefecture-level city with the longest Yellow River in the Inner Mongolia Autonomous Region and the second longest Yellow River in the country.

As the central urban area, Dongsheng District has long been a serious water shortage area in Ordos City. Due to frequent water outages, residents have been using basins and buckets to store water in households for a long time. They have suffered from water shortages and the water quality has not been well guaranteed. Since the Ordos Yellow River water supply project was completed in July 2024, the maximum daily water supply in Dongsheng District has increased from the previous 116,000 tons to 218,000 tons. Due to the problem of excessive fluoride in the quality of some raw water in Dongsheng District, in order to ensure the quality of the water environment and the safety of drinking water for the people, Dongsheng District Water Investment Group Urban Water Supply Co., Ltd. decided to conduct in-depth treatment of the water quality of the Xiliugou water source.

After multiple comparisons of technical solutions and selection of project sites, as well as intense engineering construction to overcome severe cold weather, the "Xiliugou Water Source 500m³/h Drinking Water Defluoridation Process Project" jointly built by Rinland Environmental Technology (Beijing) Corp., Ltd.and its partners for Ordos Dongsheng District Urban Water Supply Co., Ltd. recently passed acceptance and was officially put into operation. Through advanced adsorption coagulation filtration technology, the project successfully reduced the fluoride ion concentration of the raw water from a maximum of 2.7 mg/L (average 1.41 mg/L) to below 1.0 mg/L, fully meeting the index requirements of the national "Drinking Water Hygienic Standards" (GB5749-2022), and providing safer and higher-quality drinking water security for the 660,000 residents in Dongsheng District, the main urban area of ​​Ordos City, and surrounding areas.

Xiliugou water source, as an important water supply source in Dongsheng District, has long faced the problem of excessive fluoride. The fluoride ion concentration in the raw water reached a maximum of 2.7mg/L (an average of 1.41mg/L), far exceeding the national standard limit. Long-term drinking of high-fluoride water poses a great threat to human health and is the main cause of dental fluorosis and skeletal fluorosis. In order to solve this problem, Rinland Environmental Protection built an efficient drinking water defluoridation system for Ordos Dongsheng District Urban Water Supply Co., Ltd. The design treatment scale of the project is 500 cubic meters per hour. It can operate continuously for 20 hours. The daily water supply capacity can reach 10,000 tons. It can reduce the fluoride ion concentration of raw water from a maximum of 2.7mg/L (an average of 1.41mg/L) to below 1.0mg/L, meeting the safe water needs of regional residents.

————Innovative technology ensures water quality

Rinland Environmental Protection used the "adsorption coagulation filtration" integrated process for this project, combined with RL-01 drinking water grade defluoridation agent and intelligent control system, to achieve efficient defluoridation and precise control, and basically achieve the quasi-zero discharge goal of no wastewater discharge. The process flow includes raw water conditioning, fluoride removal and high-efficiency filtration, etc. to ensure that the average fluoride ion removal rate of this project reaches more than 50%, and the effluent water quality is stable and up to standard. At the same time, the project is equipped with sludge concentration, filter press and dehydration systems to achieve harmless sludge treatment, and the entire process is environmentally friendly and efficient. In order to ensure the construction period, each equipment of the project is divided into 8 modules, all of which are processed in the form of container equipment, and each module is connected by pipelines. In order to ensure that the equipment can still operate stably under minus 35 degrees in winter, the project also adopts air source heat pump heating and container insulation measures to ensure that the pipelines do not freeze during the entire process. This project has achieved the goals of engineering productization, modularization, and standardization, providing more possibilities for expanding similar project opportunities in the future.

————Safe drinking water benefits people’s livelihood

During the project implementation, Rinland Environmental Protection gave full play to its professional advantages in the field of water treatment and fluoride removal, and strictly followed the complete quality assurance system and technical measures. From the careful formulation of the design plan to equipment manufacturing, construction and installation, and inspection, everything is strictly controlled.

After strict testing, the fluoride ion concentration of the project's effluent was stably controlled at ≤1.0mg/L, and other indicators met the requirements of the National Drinking Water Hygiene Standard GB5749-2022. The successful completion of the Xiliugou water source defluoridation project not only improved the quality of drinking water in Dongsheng District, but also demonstrated Rinland Environmental Protection’s professional strength and social responsibility in the fields of drinking water defluoridation and urban water supply. In the future, with the put into use of this project, residents of Dongsheng District will be able to enjoy safer and healthier drinking water, injecting new vitality into the sustainable development of the region.

Rinland Environmental Protection simultaneously provides comprehensive technical support and after-sales service, including one-year free warranty for equipment, regular maintenance and operator training. The project team conducted special training for operators of Dongsheng District Water Supply Company to ensure that operation and maintenance personnel are proficient in process operations and emergency response capabilities, laying the foundation for long-term stable operation of the system. To this end, Zhongke Rinland will also provide escort services for a period of time to ensure that the equipment is operating normally and the water quality is stable and up to standard. The completion of the Xiliugou water source defluoridation project is an important measure for Ordos City to improve people's livelihood and implement the "Healthy China" strategy.

Through the introduction of Rinland Environmental Protection's technical cooperation, the drinking water safety of citizens in Dongsheng District, Ordos City will be well improved and guaranteed, becoming a model of water supply safety assurance projects that the city can refer to.

As the Yellow River water supply project and this fluoride removal project enter a more benign stage of operation in 2025, General Secretary Xi's blueprint of "making the Yellow River a happy river that benefits the people" will show a more vibrant rhythm of color!