What are the factors that affect the effect of coagulant use in sewage treatment plants?

In the process of using the sewage treatment plant, there are some factors that affect the coagulation effect of sewage treatment, and the influencing factors are various, mainly including the type, concentration, amount of coagulant, stirring state during coagulation treatment, PH value, temperature and its changes, etc. The following small series will specifically introduce which factors will affect the coagulation effect of sewage treatment.

1. The type and amount of coagulant, different humectants should be used for different wastewater. The amount of coagulant affects the coagulation effect to a great extent, and both excess and deficiency will lead to the dispersion and stability of the sol particles. Therefore, the optimal dosage should be determined through experiments. Generally speaking, the dosage of inorganic coagulants is relatively high, often reaching hundreds to thousands of mg/L, while organic polymer coagulants are mainly used for coagulation assistance. , the dosage is small, usually 1·10mg/L, and the maximum does not exceed 25mg/L.

2. Influence of stirring and reaction time, after a certain coagulant is fully dissolved, the generated colloid will form many tiny alum flowers after contacting with the original colloid and suspended matter in the water. This process is also called mix. The mixing process requires the water flow to generate intense turbulence, so that the agent and water can be fully mixed in a relatively fast time, and the mixing time generally requires tens of seconds to 2 minutes. Mixing is generally accomplished by hydraulic or mechanical means.

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