Case Studies on Wastewater Treatment at Stone Factories

Wastewater Issues: Stone factories use large amounts of water during the stone processing, but property owners often do not prioritize the treatment of the resulting wastewater. Additionally, some of the wastewater is discharged without treatment, causing environmental damage.

Solution: Polyacrylamide and polyaluminum chloride are primarily used. In the reaction tank, polyaluminum chloride first coagulates the fine suspended stone particles in the stone wastewater. Polyacrylamide then flocculates these small particles into larger flocs, allowing the polymer chains of polyacrylamide to fully mix and react with the fine suspended solids in the water, causing them to rapidly settle. The clear water on top is then recovered for reuse. The sludge at the bottom flows into a dewatering machine; after dewatering, the sludge is either reused or landfilled.

Treatment Results: Meets discharge standards and enables the recycling of water resources.

Precautions for Using Polyacrylamide in Stone Factory Wastewater Treatment:

Dissolution Temperature: Avoid excessively high temperatures, as this will reduce treatment effectiveness.

Agitation Conditions: Avoid vigorous agitation, as this can cause the polymer chains to break, thereby reducing treatment effectiveness. Use a low-speed paddle mixer with a speed of approximately 60 rpm. Avoid using high-speed centrifugal pumps for transportation; instead, use piston pumps or isolated pumps.

Add the product evenly and gradually. A mesh size of approximately 10 mesh is recommended. Avoid the formation of "large clumps" or "fish-eye-like" insoluble particles to ensure that the polyacrylamide dissolves completely and achieves optimal performance.