Application of Recessed Filter Press in Protein Powder Wastewater Treatment

Protein powder wastewater has the characteristics of high organic load concentration, high suspended solids, and strong biodegradability but is difficult to treat. Traditional physical precipitation or flotation methods make it difficult to completely separate solid particles in wastewater. Therefore, a recessed chamber filter press is used to separate protein powder wastewater into solid and liquid. The equipment performs well in terms of filtration efficiency, filtrate clarity, and filter cake dehydration rate. The following will introduce the application of a recessed filter press in protein powder wastewater treatment.

Why Use a Chamber Filter Press to Filter Protein Powder Wastewater?

In the protein powder production process, a large amount of washing water, fermentation residue, and equipment cleaning wastewater constitute typical high-concentration organic wastewater. This type of wastewater contains a large amount of protein residue, cell fragments, oily organic matter, and floc colloids, with high COD, high suspended matter content, easy to corrupt and stink, etc. If it is not effectively treated, it is very easy to pollute the surrounding environment.

Filter Press Treatment Process

Raw wastewater collection and pretreatment
Wastewater discharged during the protein powder production process is collected uniformly through pipes and enters the screen decontamination machine to remove large particles of residues; then enters the sand settling tank to settle large particles of inorganic impurities; finally enters the regulating tank to balance the water quality and water volume.

Flocculation reaction
The pretreated wastewater enters the flocculation reaction tank, where inorganic flocculants (such as PAC) and organic polymer flocculants (such as PAM) are added to cause protein particles and organic impurities in the water to aggregate into larger flocs, which are convenient for subsequent filter presses to capture efficiently.

Feeding
The concentrated slurry formed by flocculation is transported to the chamber filter press by a feed pump (such as a screw pump or a diaphragm pump). The filter press consists of multiple filter plates, which are closed by a hydraulic system to form a closed filter chamber.

Solid-liquid separation process
The slurry enters each filter chamber under the action of feed pressure, the liquid part flows out through the filter cloth, and the solid particles are retained on the surface of the filter cloth, gradually forming a filter cake.

Unloading and filter cloth cleaning
After the filtration is completed, the hydraulic system automatically opens the plate and the filter cake falls off to the conveying system. The filtrate can directly enter the next processing unit. The filter cloth is regularly cleaned with a high-pressure water gun to avoid clogging and affecting the filtration efficiency.

Advantages of Filter Press in Protein Powder Wastewater Filtration

High dehydration rate: low moisture content of filter cake, easy to transport and handle.
Strong adaptability of equipment: Its structure is suitable for various organic sludge, especially fermentation residues and protein viscous sludge.
The high degree of automation: It can be equipped with a PLC automatic control system to realize automatic plate opening, automatic filter cake unloading, and automatic cleaning.
High filtrate clarity: low concentration of suspended matter in filtrate, providing a guarantee for subsequent treatment or reuse.
Low operation and maintenance cost: compared with centrifugal dehydration and drying equipment, it has low energy consumption, easy maintenance, and a long replacement cycle of accessories.
Environmental protection compliance: lays a good foundation for emission compliance and zero wastewater discharge system.

Conclusion

Through the above process, it can be seen that the role of the chamber filter press in protein powder wastewater treatment is not only a simple solid-liquid separation but also an indispensable key link in the entire environmental protection treatment system. Its efficient dehydration capacity, stable filtration performance, and good automation control level make it occupy an important position in food processing and high organic wastewater treatment.

Application of Recessed Filter Press in Protein Powder Wastewater Treatment