With the increasing awareness of environmental protection and the increasingly strict standards for industrial wastewater treatment, the leather industry is facing severe challenges in wastewater treatment. Leather wastewater is difficult to treat due to its high concentration of organic matter, suspended solids, heavy metals, and other pollutants. As an efficient sludge treatment equipment, the application of screw press filter in leather wastewater treatment is gradually receiving attention.

summary

A screw press filter is a device that uses a screw propeller to squeeze and dehydrate sludge. It separates solid particles from water through a rotating spiral shaft and a fixed annular sieve. Compared with traditional sludge dewatering equipment, screw press filter has the advantages of compact structure, low energy consumption, and high treatment efficiency.

Characteristics of Leather Wastewater

Leather wastewater mainly comes from processes such as cleaning, hair removal, and tanning during leather processing. This type of wastewater contains a large amount of protein, oil, sulfide, chloride, etc., and is characterized by high organic matter concentration, high suspended solids, high chemical oxygen demand (COD), and high biological oxygen demand (BOD). In addition, wastewater may also contain heavy metals and toxic substances, posing a threat to the environment and human health.

The role of screw press filter in leather wastewater treatment

Pre treatment stage: The screw press filter can be used for the pre-treatment stage of leather wastewater to preliminarily separate suspended solids and some organic matter in the wastewater, reducing the burden of subsequent treatment processes.

Sludge concentration: After primary treatment of leather wastewater, a screw press filter can further concentrate the sludge, increase its solid content, and lay the foundation for subsequent sludge treatment and resource utilization.

Dehydration treatment: The screw press filter separates the moisture in the sludge through the squeezing effect of the screw propeller, forming a relatively dry sludge cake for subsequent transportation and processing.

Resource utilization: Dehydrated sludge can be further processed for resource utilization, such as incineration for power generation, production of organic fertilizers, etc., to achieve the resource utilization of waste.

epilogue

The application of screw press filter in leather wastewater treatment can not only effectively reduce the cost of wastewater treatment, but also improve treatment efficiency, achieve sludge reduction, stabilization, and resource utilization. With the continuous advancement of technology and the increasing demand for environmental protection, screw press is expected to play a greater role in the field of leather wastewater treatment, contributing to the green development of the leather industry.

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