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What are the problems in the use of PAC

We have a general understanding of the properties and uses of PAC. However, there are some problems needing attention in the use of PAC, which hinder the function of PAC.

1. Sediment problems

During the production of PAC, there will be too much or too little insolubles in liquid or solid regardless of the content due to raw material or process. After the solid dissolves, there will always be sediment at the bottom of the tank when it is stationary or the liquid is stored for too long.

Especially if the PAC content is low, more precipitation will occur. If the stirring is not uniform in use, it will have a great influence on the dosage and effect of dosage. If not used in time, there will be too much sediment at the bottom of the dosing tank, which will probably block the Y-type filter in the dosing system and lead to idling of the dosing pump and fluctuation of the water quality of the effluent.

Therefore, when using PAC, there are two ways to prevent sedimentation at the bottom of the PAC measuring tank. One method is to use it for a short time after dissolving the drug. The other is that the mixer is always open during the quantitative feeding process. In addition to the above two methods for preventing bottom deposition of the dosing tank, it is also necessary to regularly check whether the Y-filter in the dosing system is blocked.

2. Method of dosage determination

When removing phosphorus from water with PAC, beaker experiments can be done. Put different amount of PAC solution into two litres beaker, stir and precipitate, and take supernatant to detect residual total phosphorus. Until the total phosphorus meets the requirements. The amount of PAC added when total phosphorus meets the requirements is the amount of PAC added.

When PAC is used for water purification, it is also determined by beaker experiments. Unlike phosphorus removal, it is used to measure the remaining turbidity of water to determine whether the amount added is too much or too little.

Before applying in-situ dosing, do beaker experiment in advance to accurately determine the dosage. The dosage in-situ can be slightly more than that obtained from beaker experiment. Whether it is used for phosphorus removal and purification or not, curves can be drawn during beaker experiments.

Thank you for your attentionHenan aierfuke Chemical Co., Ltd：Focus on water treatment, only for the healthy world! Our company is committed toPolyaluminium chloride、Polyferric sulfateThe R & D, manufacturing and sales of series of water purification materials are willing to create success with our customers and friends.