For a long time, inorganic conditioning agents such as lime, ferric chloride, and polyaluminium chloride (PAC) have dominated the sludge treatment market. These chemicals are inexpensive and have a wide range of sources, but their drawbacks are becoming increasingly prominent: the dosage is large (often accounting for 20% to 50% of the dry sludge weight), resulting in a decrease in the calorific value of the sludge cake, increasing the subsequent incineration load, severe equipment corrosion, and generating a large amount of difficult-to-utilize waste residue.
As an enterprise that has been deeply engaged in the field of sludge dewatering for ten years, Works Chemical Co., Ltd. has observed that new types of sludge conditioning agents, such as sludge enhancers, are gradually changing this situation.
Main advantages:
More thorough reduction: By altering the surface structure of the sludge and breaking the cell walls, it is possible to more effectively release the internal bound water, achieving better dewatering results with a reduced dosage.
No side effects: It does not significantly alter the pH value of the sludge, does not introduce a large amount of inorganic ash, and is conducive to the subsequent resource utilization of the sludge (such as composting, incineration for power generation).
Operation is convenient: mostly in the form of white granules, which are easy to dissolve and add.
Objective Limitations and Application Tips:
We must honestly admit that the new drug is not a "cure-all".
Adaptive differences: For certain special industrial sludges (such as those with extremely high oil content or excessive heavy metal levels), using a single modified polymer may not be effective. Other additives need to be combined.
2. Cost Consideration: Although the overall cost may be reduced, the initial purchase price of the chemical is higher than that of traditional lime. Customers need to calculate the "total cost" rather than just the "unit price" in order to make an informed decision.
3. Process Compatibility: The new reagent has relatively high requirements for the mixing reaction conditions. If the stirring is insufficient, it may not achieve the optimal performance.
Works Chemical Co., Ltd. suggests that when enterprises carry out technological upgrades, they should thoroughly assess the characteristics of their sludge and the disposal options, and rationally choose a "traditional + new" combined process or a pure new process, avoiding blind following trends.