We recognise that
polyacrylamide finds extensive application in water purification processes. Moreover, selecting the appropriate grade can significantly reduce operational costs. Despite this, common misconceptions frequently arise during its utilisation. Let us examine these!
One prevalent misconception is that higher molecular weight invariably yields superior flocculation and performance. This is not necessarily the case. Numerous polyacrylamide grades exist. The properties of wastewater vary considerably across different treatment scenarios. Some are acidic, others alkaline, while some contain oils – the types of water are numerous. No single product can universally address all water qualities. Only by tailoring treatment to the specific water quality and using the appropriate product can effective results be achieved. Misconception Two: Molecular weight and ion degree are key indicators for polyacrylamide. Selecting product grades based solely on ion degree is unreliable. Ion degree refers to the polarity and density of ionic charges. Products with higher ion degrees typically have lower molecular weights. Simultaneously, products with higher ion degrees command higher prices. Therefore, further experimentation is essential to determine the appropriate product specification. Misconception Three: Does the product solution require prolonged stirring? Amides typically present as white granules or powders. Dissolution is necessary prior to use. Note that stirring should last approximately 30-40 minutes; insufficient stirring is inadvisable, yet excessive duration is also undesirable. During colder winter months, stirring time may be moderately extended.
When using polyacrylamide, the typical concentration range is 0.1%–0.3%. The exact concentration depends on the wastewater and sludge concentration. Increase the concentration when impurities are excessive. However, excessively high concentrations may impair efficacy. Therefore, thorough experimentation is essential to determine the optimal dosage.
What should be noted during experimentation? When testing polyacrylamide, efficacy can be assessed by evaluating floc size and strength. Prior to testing, it is advisable to determine the water's pH level to identify the most suitable flocculant. If the appropriate grade is uncertain, prepare solutions using commonly available product grades for comparison. Remember, only selecting the correct grade ensures effective performance during application.
