Deepening Resource Utilization: Transitioning from "wastewater treatment" to "resource recovery", equipment will not only purify wastewater but also prioritize the recovery of resources such as nitrogen and phosphorus. For instance, struvite crystallization equipment is employed to recover phosphorus from wastewater, which is then used to produce slow-release fertilizers. The treated reclaimed water is extensively utilized in industrial production, agricultural irrigation, and urban ecological replenishment, alleviating water resource pressure.

The "Smart Water Innovation Technology Exchange Meeting" was held on April 2, 2021, at the Hongkou Branch of Tongji University Science Park. It was jointly hosted by the Tongji University Smart Water Joint R&D Innovation Center and the Hongkou Branch of Tongji University Science Park. The event invited experts and professors from the School of Environmental Science and Engineering of Tongji University, as well as representatives from consulting firms, design institutes, some listed companies, and enterprises in the Tongji Hongkou Park, to conduct an in-depth discussion on the development prospects, policies, and especially technological trends of smart water during the "14th Five-Year Plan" period

The food industry encompasses numerous industries such as meat processing, aquatic product processing, dairy processing, canning, brewing, and sugar production. Consequently, the food industry utilizes a wide range of raw materials and produces a diverse array of products, resulting in significant variations in the volume and quality of wastewater discharged. Unlike other industrial wastewaters, food industry wastewater typically does not contain harmful substances such as heavy metals or pesticides, but its BOD and COD levels are generally higher. Since most of the raw materials used in the food industry are organic substances that can be digested by the human body, the biodegradability of food industry wastewater is generally good

Rural sewage treatment equipment possesses unique characteristics, such as a small footprint and ease of integration. It not only treats domestic sewage but also scales up for large-scale wastewater treatment. As a core processing device, it stands as an excellent assistant for sewage treatment, offering cost-effective and affordable integrated sewage treatment equipment. The purification tank for rural sewage treatment utilizes an enhanced A/O + filtration technology, equipped with a cutting-edge intelligent control system. It boasts a short installation and commissioning period, low investment and operational costs, high treatment efficiency, and secondary pollution characteristics. China Agriculture ....

Printing and dyeing wastewater is discharged by printing and dyeing factories that primarily process cotton, linen, chemical fibers, and their blended products. The volume of printing and dyeing wastewater is substantial, with 100 to 200 tons of water consumed for every ton of textile processed, of which 80 to 90% becomes wastewater. Characteristics of printing and dyeing wastewater: Printing and dyeing wastewater is one of the more difficult industrial wastewaters to treat, characterized by high COD concentration, high chromaticity, high salt content, refractory organic matter that is difficult to biodegrade, and significant variations in water quality and quantity over time (wastewater is discharged intermittently). The prominent issues in printing and dyeing wastewater treatment are chromaticity and refractory organic matter ....

During the pulping process, fiber separation occurs. During bleaching and papermaking, processes such as dilution, pressing, and drying of the pulp material result in the discharge of highly concentrated wastewater, known as black water, containing a large amount of pollutants such as fibers, inorganic salts, and pigments. The washing and bleaching processes generate a significant amount of intermediate water containing high concentrations of lignin, cellulose, resinates, and other components that are difficult to biodegrade. The papermaking machine discharges wastewater containing a large amount of fibers, fillers, and sizing agents, known as white water. The characteristics of papermaking wastewater include high COD and suspended solids (SS) content, and severe coloration. The SS in papermaking wastewater