Strategies for Reducing Wastewater Discharge from Sand Washing Equipment

Reducing wastewater discharge from sand washing equipment is crucial for achieving environmentally friendly production. Here are some effective measures:

Optimize Equipment and Processes
Select efficient and water-saving sand washing equipment, such as wheel sand washers and fine sand recovery machines, which offer good sealing performance and reduce dust leakage and water consumption. Optimize the production process by using water flow and stirring to separate sand from soil, and further improve water resource utilization with dewatering screens and fine sand recovery devices. Additionally, establish sedimentation and storage ponds to recycle wastewater after sedimentation, reducing the use of fresh water.Install Wastewater Treatment Equipment

Equip the facility with wastewater treatment devices like filter presses, which can convert slurry wastewater into reusable clear water. For example, high-pressure filter presses can reduce the moisture content of mud cakes to 15%-30%, with filtered water turbidity stable at 10-20 NTU, suitable for direct reuse. A zero-discharge sand washing system, including screens, integrated fine sand recovery machines, sedimentation tanks, and filter presses, can achieve separation of mud and sand, mud and water, and solid waste dewatering, resulting in zero wastewater discharge.

Chemical Treatment Methods
Add coagulants (such as polyaluminum chloride) and flocculants (such as polyacrylamide) to wastewater to aggregate fine particles into larger ones, accelerating sedimentation and separation and improving wastewater treatment efficiency.Strengthen Management and Monitoring

Accurately control the dosage of chemicals to avoid excessive use. Regularly maintain equipment to ensure its proper operation. Train employees to enhance their awareness of water conservation and wastewater reduction.

By implementing these measures, sand washing equipment can effectively reduce wastewater discharge, achieving both environmental protection and cost reduction.