⒈ Coagulation Stage: This is the process in which the chemical solution is injected into the coagulation tank and rapidly mixes with the raw water to form fine floc particles within a very short period. During this stage, the water body typically becomes more turbid; the process requires the water flow to generate intense turbulence. In beaker tests, it is recommended to stir rapidly (at 250–300 rpm) for 10–30 seconds, generally not exceeding 2 minutes.
⒉ Flocculation Stage: This is the process in which the floc particles grow and coarsen. It requires an appropriate level of turbulence and sufficient retention time (10–15 minutes). In the later stages, a large number of floc particles can be observed aggregating and slowly settling, forming a clear supernatant layer. In beaker tests, stir initially at 150 rpm for approximately 6 minutes, then at 60 rpm for about 4 minutes until the particles remain in a suspended state.
⒊ Sedimentation Stage: This is the process of floc settling that takes place within a sedimentation tank. It requires a slow water flow; to enhance efficiency, inclined-tube (or inclined-plate) sedimentation tanks are typically employed (though air flotation is often the preferred method for separating floc). Large, coarse floc particles are intercepted by the walls of the inclined tubes (or plates) and settle at the bottom of the tank, leaving the upper layer as clarified water. The remaining smaller, lower-density floc particles continue to descend slowly while colliding with one another to form larger aggregates; in the later stages, the residual turbidity remains essentially constant. In beaker tests, it is recommended to stir slowly at 20–30 rpm for 5 minutes, followed by a static settling period of 10 minutes, after which the residual turbidity is measured.
⒋ Enhanced Filtration: This primarily involves the judicious selection of filter bed structures and filter aids to improve the removal efficiency of the filtration tanks; it constitutes a crucial measure for enhancing water quality.
⒌ Applications: This product is utilized in environmental protection and industrial wastewater treatment. The application methods are generally identical to those used in water treatment plants. When treating raw water characterized by high color levels, high COD (Chemical Oxygen Demand), or high BOD (Biochemical Oxygen Demand), the efficacy of the treatment is significantly enhanced when supplemented with auxiliary agents.
⒍ For enterprises currently employing chemical coagulation methods, no major modifications to existing equipment are required; the product can be utilized simply by installing an additional dissolution tank for the coagulant.
⒎ Storage: This product must be stored in a dry, moisture-proof, and heat-free environment.
⒏ Preparation: This product must be dissolved prior to use. The dissolution equipment and chemical dosing facilities should be constructed using corrosion-resistant materials.
