treating swimming pool sewage with flocculation precipitation

Flocculation and precipitation treatment refers to the treatment process of using flocculant to coagulate suspended particles in water and then precipitate. The flocculation process involves the bonding and condensation of fine colloids and dispersed particles in water due to the action of molecular attraction. Bond condensation is divided into two types: free flocculation (which occurs in the sedimentation tank) and contact flocculation (which occurs in the suspension clarification tank or contact filter). The generated aluminum compounds play a role in strengthening and improving the treatment efficiency in precipitation, filtration, and other water treatment processes.

The action principle of swimming pool flocculant

The suspended material in the pool is generally soluble. However, many of its surfaces carry an electric charge (ZETA potential), making it very stable in the water and preventing settling. After adding the flocculant, the substances with opposite charges in the flocculant can compress and neutralize the potential of the suspended substances, so that they lose stability, collide and fuse with each other, and thus settle. Some flocculants can directly adsorb suspended substances, and polymer flocculants can also bridge small suspended particles directly.After adding the flocculant, the substances with opposite charges can compress and neutralize the potential of the suspended substances. This causes them to lose stability, collide, fuse with each other, and settle. In the process of collision and agglomeration, the size of floc will gradually grow, and the mass of floc will increase immediately, and then separate from the water body and precipitate to the lower part of the water body. The precipitation treatment efficiency of water not only depends on the precipitation rate of particles, but also on the precipitation rate of floc. The precipitation rate of floc alum increased with the depth of water.

Basic steps of swimming pool water treatment

• Swimming pool water treatment involves a lot of work and steps, in order to keep the swimming pool water sanitary and clean, it is necessary to carry out algae suppression work on the swimming pool water, it is necessary to add swimming pool disinfectant, it is necessary to circulate the filtration system to filter pool debris every day, and it is necessary to use the pool suction machine to absorb the pool.
• In the process of swimming pool water treatment, the circulating filtration system can not filter out the small particles in the pool, at this time, we need to use the pool water treatment flocculant to flocculate and precipitate the small debris in the pool water, and then suck the dirt on the bottom of the pool.
• Flocculation plays a key role in the process of cleaning swimming pool water. Water treatment flocculant is also known as water treatment precipitant, water treatment coagulant. The general water treatment flocculant used in swimming pools is inorganic flocculant – polyaluminum chloride.

Flocculant cleaning methods for swimming pools

When PAM is used as a flocculant in swimming pool water treatment to precipitate the water, the operational method and environment pose challenges for many swimming pool managers during the flocculation process. Here we explain in detail how to use PAM to flocculate a swimming pool

Water treatment flocculant dosing time

It is generally recommended to add flocculant to the pool water at the end of the evening. The required static precipitation time should not be less than 6 hours before addressing pool pollution.

pH control

The most suitable PH range of polyaluminum chloride is 7.5-8.5, in the alkaline environment, it can give full play to its hydroxyl bridging effect, accelerate the coagulation sedimentation, so before adding flocculant should first check and adjust the PH value of the pool water.

Dosage

Calculate each dosage based on the total volume of the pool, and ensure that the concentration of flocculant added to the pool water reaches 5-10mg/L. The frequency of adding flocculant to the swimming pool can be adjusted based on the level of pollution, with 1-2 times per week being a common recommendation.

Dosing mode

The recommended amount is 5-10KG per 1000 cubic meters of water. When used, mix solid polyaluminum chloride in a 1:3 ratio with water, dissolve it first, then dilute with water to a 2-3% solution, and spill it into the swimming pool for use.