Plate and frame filter presses play a significant role in sludge treatment, but sometimes they encounter the problem of unformed sludge pressing, which not only affects the treatment efficiency but may also increase the difficulty and cost of subsequent treatment. So, in the face of this problem, how should we solve it?

I. Analyze the cause ‌

First of all, we need to clarify the reasons why the pressed mud does not take shape. Common causes include unsuitable sludge properties, improper parameter Settings of the filter press, unreasonable selection of filter cloth, and improper operation and maintenance, etc. The moisture content, viscosity, particle size and other properties of sludge directly affect the filtration effect. The parameter Settings such as the pressure and pressing time of the filter press determine the degree of sludge compression. The material and pore size of the filter cloth affect the permeability of sludge and the dewatering effect. Improper operation and maintenance, such as incomplete cleaning of the filter cloth and failure to repair equipment malfunctions in a timely manner, can also affect the filtration effect.

II. Solution ‌

Adjust sludge properties ‌ : Improve the dewatering performance of sludge by adding sludge enhancers or adjusting the sludge treatment process. Sludge enhancers can destroy the colloidal structure in sludge, release water and improve the dewatering efficiency of sludge.

Optimize the parameters of the filter press ‌ : According to the nature of the sludge and the treatment requirements, reasonably set the parameters such as the pressure and pressing time of the filter press. Generally speaking, increasing pressure and extending the pressing time can enhance the compression degree of sludge, which is conducive to forming a tighter mud cake.

Select the appropriate filter cloth ‌ : according to the nature of the sludge and the treatment requirements, choose a filter cloth with suitable material and reasonable pore size. The filter cloth should have good air permeability and dehydration performance, and be easy to clean and replace at the same time.

Strengthen operation and maintenance ‌ : Regularly clean and maintain the filter press to ensure it is in good condition. Replace worn filter cloth and seals in a timely manner to prevent leakage and malfunction. At the same time, strengthen the training and management of operators to enhance their operational skills and sense of responsibility.

III. Case sharing ‌

When a certain sewage treatment plant was using a plate and frame filter press to treat sludge, it encountered the problem that the sludge was not formed properly. After analysis, it was found that the problem was caused by the excessively high moisture content and high viscosity of the sludge. So, the factory took measures such as adding sludge efficiency enhancers and adjusting the parameters of the filter press. After adding the sludge efficiency enhancer, the dewatering performance of the sludge was significantly improved. Meanwhile, by increasing the pressure and extending the pressing time, a compact mud cake was successfully formed. This solution not only enhances processing efficiency but also reduces the difficulty and cost of subsequent processing.