The solid particulates are retained by the discharge system and the filter medium as the wastewater passes through the filter plates. The wastewater slurry is fed into the system indefinitely until all of the water is squeezed out. Before disposal, the remaining solids form a dry cake and are collected in a basin. The goal of sludge dewatering is to reduce the volume of water in the slurry, allowing it to be condensed for easier disposal. There are several methods for sludge dewatering filter press technology to choose from. Each has advantages and disadvantages, so understanding the differences is critical to determining which method is best for your bottom line.
Alfa Laval is the sole supplier of Orege in greenfield and brownfield applications. ChemREADY’s team of water treatment experts can assist you in combining your dewatering efforts with total water treatment that optimizes your systems. We can conduct a chemical analysis of your water to determine the best flocculants, coagulants, and pH balancers to use to treat it before mechanical separation. This improves the performance of your clarifiers and filter presses, resulting in better and more efficient total water treatment.
Automatic Filter Press Operation
The equipment is highly automated, so operators are only needed for equipment setup, cake removal, and routine maintenance. The filter press is designed to provide high-quality solids dewatering at the lowest possible operating and maintenance costs. Other technologies can be costly, noisy, energy-intensive, and unreliable.
Once the chambers have been filled and the filter cake formation has begun, the sludge feed pump is automatically turned off based on a preset instantaneous sludge flow rate, filtrate flow rate, or time. High-pressure water or air is then pumped into the space between the diaphragm and the plate, squeezing the already formed cake and releasing additional water. Dewatering the cake to the desired solids content typically takes 15 to 30 minutes of constant pressure at 1380 to 2070 kN/m2. The water is returned to a reservoir at the end of the cycle, plates are automatically opened, and the sludge cake is discharged. When a filter press’s chambers are full, the filtration cycle is complete, and the machine releases the filter cakes. These cakes are easily removed, allowing for high-efficiency water filtration.
A growing number of wastewater treatment plants are realizing the advantages of a circular, holistic approach to wastewater treatment. Cost savings, reduced environmental impact, and new revenue streams from recovered resources are just a few of the benefits. Every wastewater treatment plant is distinct in its own way, with its own set of challenges and opportunities.
Filter Plate Capacities
They can be easily sized for capacities ranging from.25cuft to 1000cuft and can remove up to 99% of suspended solids. Performance For sludge with poor dewaterability or when it is desirable to dewater sludge to a solids content greater than 35%, a pressure filter press is an excellent choice. Variable-volume units are preferred over fixed-volume units when sludge characteristics are expected to change dramatically over a normal operating period. A variable volume press assembly schematic 3.22 Diagram Filter press with recessed plate. A plate press is a collection of filter plates held together by hydraulic cylinders.
Below are some examples of our mobile filter presses and mobile water purification systems. Some filter presses also need to be mobile because their jobs are constantly changing. A mobile filter press can be used to filter different tanks at different times. A job site may also shift, and the mobile filter press must follow. Finally, some jobsites only require a filter press for a short period of time, and the mobile press can meet this requirement as well.
Our filtration experts will collaborate with you to determine whether polymer addition is beneficial to your specific process. The type of cloth used is determined by the filter press’s process or application, the operating environment, and the performance required by the filtering media. When designing a dewatering system, pilot testing and scaling up from pilot to full scale are recommended.