Phenomena of Declined Settling Performance of Activated Sludge The main phenomena observed when the settling performance of activated sludge declines include: The decline in sludge settling performance is often accompanied by several of these phenomena. If this condition persists for a long time, the concentration of return sludge in the secondary clarifier will gradually decrease,

The salt separation crystallization processes commonly used in zero wastewater discharge include thermal salt separation, evaporation + freeze crystallization, and nanofiltration + separate evaporation crystallization. 01. Thermal Salt Separation This method utilizes the solubility differences of sodium sulfate (Na₂SO₄) and sodium chloride (NaCl) at different temperatures and carries out evaporation at varying temperatures. Sodium sulfate

1. Activated Sludge Method Process and Principle: The typical activated sludge method consists of an aeration tank, sedimentation tank, sludge recirculation system, and excess sludge discharge system. Wastewater and recirculated activated sludge enter the aeration tank to form a mixed liquor. Compressed air, supplied by an air compressor station, is introduced into the wastewater in

With the continuous advancement of fruit and vegetable juice processing technologies and the increasing demand for differentiated product standards, the market for concentrated fruit and vegetable juices has become more stringent and refined. To achieve high-quality juice products, it is essential to remove or adjust certain components during the processing. Adsorption separation technology offers unique

Chlorinated hydrocarbons, such as methylene chloride, ethylene dichloride, and chloroform, are commonly used as solvents or synthetic raw materials in industries like pharmaceuticals, pesticides, and fine chemicals. However, due to their relatively low boiling points, these chlorinated hydrocarbons tend to volatilize significantly during production, causing material loss and creating environmental pressure due to the waste

Under the dual pressure of industrial production and environmental protection, fluoride-containing wastewater treatment technology has attracted unprecedented attention. Traditional defluorination processes, such as chemical precipitation and flocculation, while solving some of the issues, often suffer from low efficiency, high costs, and complex operations. Southwind offers an innovative solution with its new nanotechnology-based fluoride removal resin,

Nuclear energy, as an efficient and clean energy source, plays a crucial role in human development and sustainability. Uranium, the primary fuel for nuclear reactors, is utilized for nuclear power generation. Its isotope, uranium-235 (U-235), undergoes fission within nuclear reactors to produce heat energy, which is subsequently converted to mechanical and then electrical energy. Due

In the sugar industry, decolorization of syrup, sucrose, and MSG is a key step in enhancing product quality. Traditional decolorization methods, such as using activated carbon, are effective but costly and difficult to regenerate. As a result, more sugar manufacturers are turning to sugar decolorization resins, using ion exchange resin technology to achieve higher efficiency

Ultra-pure water, also known as UP water, is water with a resistivity of 18MΩ·cm (25°C). Polishing mixed bed resins are designed to remove almost all conductive substances from the water, as well as colloidal matter, gases, and organic compounds, to very low levels. Main Process Flow for Preparing Ultra-Pure Water with Polishing Resins: HaiPu Polishing