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China faces severe water scarcity, with a total freshwater resource of 2.8 trillion cubic meters, accounting for just 6% of the world's total. Although it ranks fourth globally after Brazil, Russia, and Canada, its per capita water availability is only 2,300 cubic meters—about one-quarter of the global average and less than one-fifth of that in the United States. This places China among the 13 countries with the most limited water resources.
Groundwater pollution has become a growing concern, as many cities face contamination from point and surface sources. Water pollution not only reduces the usability of water bodies but also intensifies the water shortage crisis and threatens public health and urban drinking water safety. As urbanization accelerates, the demand for water will continue to rise, making wastewater recycling an essential solution.
Traditional sewage treatment methods involve coagulation, sedimentation, and filtration, but these processes often result in low solid-liquid separation efficiency. To address this, advanced technologies like granular fluidized bed wastewater treatment have emerged. This innovative method improves efficiency by enabling rapid coagulation, effective particle agglomeration, and efficient solid-liquid separation.
In a fluidized bed, particles are suspended in a flowing fluid, creating conditions similar to a liquid. This allows for enhanced mixing, better reaction dynamics, and improved performance in removing suspended solids and organic matter. The granular fluidized bed technology offers several advantages, including short hydraulic retention time, compact design, and high processing efficiency.
This technology is particularly suitable for treating high-turbidity wastewater and industrial effluents. It has been successfully applied in various scenarios, such as car wash wastewater treatment, municipal sewage sludge concentration, and industrial water reuse. Compared to traditional methods, it reduces sludge moisture content, minimizes the need for additional dewatering equipment, and lowers operational costs.
Recent studies and practical applications have demonstrated the effectiveness of granular fluidized bed technology in improving water quality and reducing environmental impact. Despite its promising potential, further research is needed to optimize its performance and expand its application scope. With continued development, this technology could play a key role in sustainable water management and pollution control in China and beyond.
October 06, 2025