Textile and Dyeing Industry - Wastewater Treatment
Industry Background
Wastewater from textile and dyeing operations contains substantial amounts of dyes, auxiliaries, starch residues, and suspended solids. It typically features high colourity, high organic load, and fine dispersed particles that settle poorly. During sludge treatment, this type of sludge often shows poor flocculation response, low structural strength, and high moisture content. If the dewatering equipment is not properly suited, issues such as unstable sludge layer formation, filter cloth clogging, and dark filtrate can occur. Therefore, the equipment must be capable of handling high-colourity, highly dispersed sludge while maintaining effective cleaning and permeability to achieve stable and efficient operation.
Technical Approach
Considering the fine particle size and fragile flocs typical of textile and dyeing sludge, Haibar’s belt filter press features an extended gravity drainage zone to enable smoother sludge-water separation and reduce floc breakage from shear forces. The pressing zone uses multi-stage progressive compression to gradually increase solids content under uniform pressure. The high-pressure fabric-cleaning system maintains excellent permeability even when processing dye-loaded sludge, preventing colour accumulation from affecting filtration performance. The entire system can be adjusted according to different wastewater characteristics and sludge properties, providing a highly stable and controllable dewatering solution for textile and dyeing plants.
On-site Photos
The photos were taken at a textile dyeing wastewater treatment workshop in Zhejiang. The Haibar belt filter press shown is dewatering high-colourity dyeing sludge, operating smoothly with well-permeable filter fabric and evenly formed sludge layers. The automatic tensioning and tracking systems respond precisely, ensuring stable performance even with fine-particle sludge. Since commissioning, the system has effectively reduced sludge moisture content, decreased transportation volume, and improved the overall efficiency and effluent quality of the plant.
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