In view of the problems that the mud is too thin, unformed and sticky in the process of municipal sludge pressing, it can be solved from the following aspects:

One. Optimization of sludge conditioning

Select the right sludge conditioner:

Sludge conditioner can change the physical and chemical properties of sludge and improve its dewatering performance. Selecting the appropriate sludge conditioner and determining the best dosage is helpful to reduce the moisture content of sludge and improve the formability of mud cake.

Mixed evenly:

Ensure that the sludge and the conditioner are fully mixed evenly, to avoid the local concentration is too high or too low resulting in poor conditioning effect.

Two, adjust the filter press operating parameters

Increase press pressure:

In the press filtration process, the appropriate increase of pressing pressure can further reduce the moisture content of the mud cake, improve its compactness and formability.

Extended press time:

For some sludge that is difficult to dehydrate, the pressing time can be appropriately extended to ensure that the water is fully squeezed out.

Select the right filter cloth:

The choice of filter cloth has a great influence on the filter press effect. The appropriate filter material and aperture size should be selected according to the nature of the sludge to avoid clogging or slime of the filter cloth.

Three. Strengthen sludge pretreatment

Reduce sludge organic content:

If the organic content in the sludge is too high, the organic content can be reduced by pretreatment measures such as anaerobic digestion and aerobic fermentation, so as to improve the dewatering performance of the sludge.

Adjusting sludge pH value:

The pH value of sludge also affects its dewatering performance. By adjusting the pH value of the sludge to the appropriate range, the flocculation effect of the sludge can be improved and the moisture content can be reduced.

Four, maintenance of filter press equipment

Regular cleaning of filter cloth:

Clean and replace the filter cloth regularly to keep the filter cloth clean and unobstructed to avoid clogging and mud.

Check and maintain equipment:

Check and maintain the filter press regularly to ensure its normal operation and adequate pressure output. In particular, check the wear and damage of key components such as hydraulic system, press system and filter plate, and replace and repair them in time.

Five, improve sludge dewatering process

New dehydration technology:

With the continuous development of technology, some new sludge dewatering technologies such as high-pressure diaphragm filter press, plate and frame filter press have gradually been applied. These technologies have the advantages of high dehydration efficiency and low water content of mud cake, and can be improved by selecting suitable technologies according to the actual situation.

Optimize the process flow:

The existing sludge dewatering process was optimized and improved, such as adding pretreatment steps and adjusting the dosage sequence, so as to improve the dewatering effect of sludge and the formability of mud cake.

 

In summary, to solve the problem of municipal sludge pressing mud is too thin, not formed and sticky filter cloth, comprehensive treatment needs to be carried out from many aspects. The dewatering property of sludge and the formability of mud cake can be effectively improved by optimizing sludge conditioning, adjusting operation parameters of filter press, strengthening sludge pretreatment, maintaining filter press equipment and improving sludge dewatering process.