As is well known, the most common type of water treatment consumables for purifying sewage is polyaluminum chloride water purifier. As buyers, they all hope that the water purification products they purchase and use are the best in terms of price and effectiveness. Therefore, it is extremely important to choose the most suitable water purification agent for the type of wastewater that needs to be treated.
Do you know which types of wastewater can be treated with polyaluminum chloride, which is one of the most commonly used water purifiers?
No.1 Domestic Water
Treatment of aquatic wastewater for daily use, also known as the treatment of washing wastewater. Due to the presence of a large amount of surfactants in water, if this agent reacts with oil stains, dust particles, etc., it will form negatively charged colloidal particles that are easily and stably retained in the water.
No.2 papermaking wastewater
The treatment of papermaking wastewater has a large amount of discharge from the papermaking industry, with a large proportion coming from stage water treatment. Moreover, many papermaking enterprises’ black liquor is also mixed with middle stage water for treatment after pre-treatment (anaerobic, strong acid treatment, cellulose separation, neutralization, etc.). This increases the amount of harmful substances in papermaking wastewater.
The use of polyaluminum chloride coagulation precipitation to treat papermaking wastewater increases the removal rates of COD and SS with the increase of salinity. It should be noted that after a salinity of 75%, the removal rate decreases instead. Adding 0.6gL of polyaluminum chloride with a salinity of 75% at a temperature of 250 ℃ can ensure that the effluent meets the national discharge standards.
In addition, polyaluminum chloride has practical significance in the treatment of papermaking wastewater due to its low price and the fact that the sediment can be returned to the papermaking process as raw material, which does not have secondary pollution problems and can generate certain economic benefits. Research has found that under alkaline (pH 7-9) conditions, when the dosage of coagulant is greater than 750mgL, the removal rate of suspended solids can reach over 95% and CODCr can be removed by 20-50%.
No.3 Printing and dyeing wastewater
We are familiar with the treatment of printing and dyeing wastewater, which has high COD, chromaticity, and pH value. Adding chemicals and coagulation to its wastewater is a commonly used treatment method.
Although the coagulation effect of polyaluminum chloride is good and the amount of medication we add during use is relatively low, its ability to neutralize high alkalinity in printing and dyeing wastewater is poor, and its application is limited to some extent.
Through years of research, combining the use of two coagulants, utilizing their complementary advantages and the synergistic effect of the same ion effect, the treatment of printing and dyeing wastewater can reduce treatment costs and improve treatment efficiency.
No.4 Oily wastewater
The treatment of oily wastewater mainly refers to the large amount of produced water generated from oil field extraction, oily wastewater discharged from refineries and petrochemical plants, and oily wastewater generated from cleaning oil tankers and vehicles.
The treatment of oily wastewater generally adopts methods such as oil separation sedimentation, air flotation, and biochemical treatment. The combination of polyaluminum chloride and modified cationic polyacrylamide has a very good treatment effect in treating oily wastewater through coagulation, sedimentation, and filtration.
The relative molecular weight of modified cationic polyacrylamide should not be too high and should be easily combined with polyaluminum chloride to achieve the desired effect.
The main products of flocculant manufacturer Xinhuan Water Treatment are:
White polyaluminium chloride (food grade),
drinking grade polyaluminium chloride,
industrial grade polyaluminium chloride,
anionic polyacrylamide,
cationic polyacrylamide, nonionic polyacrylamide, petroleum recycling polyacrylamide, oil recovery polyacrylamide, polyacrylamide, polymer flocculant polymer flocculation coagulant, polymeric ferrous sulphate, polymerized iron and aluminium chloride, and other water treatment chemicals. Welcome customers to write to us to negotiate business!
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