During the use of
polyaluminium chloride products, we observe that different concentrations exhibit distinct colour variations in appearance. Consequently, when determining the concentration of polyaluminium chloride products, visual colour assessment serves as a viable method. With evolving production materials and processes, an increasing number of individuals can now discern the concentration of polyaluminium chloride products through visual inspection alone.
Simply put, colour can be used to distinguish the concentration of polyaluminium chloride. Place the polyaluminium chloride in sunlight. A 30% concentration product typically exhibits a lustrous golden yellow or pale yellow hue. A 28% concentration, while still displaying sheen under sunlight, presents a slightly duller yellow. Products around 25% concentration appear noticeably darker in colour. Generally, the nationally stipulated standard content for polyaluminium chloride ranges between 28-30%. It presents as a yellow or pale yellow solid powder. It dissolves readily in water while exhibiting strong bridging and adsorption properties. During hydrolysis, no additional products need be added when using polyaluminium chloride. It exhibits a broad pH tolerance range and is non-corrosive to pipeline equipment. Flocculation occurs rapidly, delivering excellent purification results for highly turbid water.
However, distinguishing between different concentrations of polyaluminium chloride products can also be determined by the nature of insolubles. An appropriate quantity of the product can be tested to observe the amount of insolubles. Generally, the fewer insolubles present, the higher the quality of the polyaluminium chloride. There are several concentrations of polyaluminium chloride available. How do we select the appropriate product?
As a highly effective water treatment chemical, polyaluminium chloride is primarily employed in domestic sewage and industrial wastewater treatment. Its application scope varies according to product concentration. Concentrations exceeding 30% are typically suitable for the potable water industry. Concentrations above 28% are appropriate for industrial wastewater treatment. Products with a content of 26% or below are suitable for treating municipal domestic sewage. Generally, such PCA products are appropriate for treating municipal wastewater with low turbidity. As the applicable industries differ, one should not select blindly when using them. The appropriate PCA content should be chosen based on one's actual circumstances.
