Sewage treatment is one of the important tasks to protect the environment and maintain human health. PAC PAM (polyaluminium chloride and polyurethane) is a commonly used chemical in wastewater treatment and is often used to remove suspended solids and organic matter from wastewater.
PAC is a commonly used coagulant for the removal of suspended solids from wastewater. When it is added to the effluent, the aluminium chloride in the PAC reacts chemically with anions and suspended solids particles in the water to form an aluminium hydroxide precipitate. These sediments can adsorb and aggregate suspended solids particles, making them large enough to settle to the bottom of the effluent.
PAM is an organic polymer that is commonly used as a flocculant in wastewater treatment. The molecular chains of PAM have a strong adsorption capacity and can adsorb organic substances in water. In the process of sewage treatment, the addition of PAM can effectively improve the effect of flocculant, so that the fine suspended solids can be aggregated into large particles, which are easier to precipitate and remove.
In practice, the ratio of PAC and PAM needs to be adjusted according to the specific situation. Common ratios range from 1:2 to 1:10, which is the mass ratio per unit of PAC to per unit of PAM. The choice of this range depends on the quality of the effluent and the purpose of treatment.
The correct PAC PAM ratio is critical to the effectiveness of wastewater treatment. If the PAC PAM ratio is too small, that is, the amount of PAM is too much, it may lead to excessive adsorption of flocculant, so that the water quality after sewage treatment is not up to standard. Conversely, if the PAC PAM ratio is too large, i.e., the amount of PAC is too much, it may cause waste and unnecessary cost increases.
Water quality is one of the important considerations in choosing a PAC pam ratio. When the content of suspended solids in the wastewater is high, a larger PAC PAM ratio is required to achieve better sewage treatment results. When the content of suspended solids in the sewage is low, the PAC PAM ratio can be appropriately reduced to save costs.
The purpose of treatment is also one of the important considerations in the selection of PAC PAM ratio. If the main objective is to remove suspended solids, a larger PAC PAM ratio can be selected to achieve a better coagulation effect. If the main purpose is to remove organic matter, a smaller PAC PAM ratio can be selected to allow PAM to play more of an organic role in adsorption.
PAC pam plays an important role in wastewater treatment. The right ratio selection is the key to ensuring the effectiveness of wastewater treatment. Choosing the appropriate PAC ratio according to the water quality and treatment purpose can effectively improve the sewage treatment effect, reduce the cost and protect the environment.