Sludge Dewatering Processes for Various Wastewater Treatment Applications6793769
Sludge dewatering is the procedure of removing water from sludge. Following wastewater treatment, the remaining material generally has a high water content. This final step in the treatment procedure reclaims much of the liquid.
The sludge handling and disposal process is a major price for wastewater facilities. Improvements to older methods as nicely as innovative options are now available for treatment plants. Some of these options include:
Belt Filter Presses
This type of equipment has been about for many years and is still regarded as one of the business requirements. These systems are simple to operate and familiar to most facility staff but are not the very best alternative for containing odors.
Centrifuges
Centrifuges have been significantly improved over the long period of time that they have been used in the sludge dewatering process. They are recognized to be fast (about 3000 rpm), which means they need normal maintenance. Still, they are constructed to be extremely reliable and easy to operate. Centrifuges typically create the driest cake, meaning the most water feasible has been removed. Simply because they are self-contained, the odor control is not a big issue. This versatile piece of equipment handles changing conditions and does well in all sorts of treatment applications.
Rotary Disc Press
This is a relatively new method that entails feeding flocculated material in between slowly rotating screens within each disc assembly. The gear may include from one to six discs per unit. Users like the slow rotation (usually in between one and 3 rpm) and how the whole system is self-contained.
Inclined Screw Press
Similar to the rotary disc press, this system feeds flocculated material into an inclined screw that rotates inside a stainless nonetheless wedge wire screen. It also operates at a extremely slow speed and is self-contained. It utilizes minimal horsepower compared to other methods, resulting in reduce operation costs.
Horizontal Screw Press
This system is similar to the inclined screw press, but the flocculated material is fed into a horizontal rotating screen. It works nicely when greater quantities are anticipated. They have been used traditionally in the pulp and paper business, and more lately with wastewater treatment plants.
The correct sludge dewatering gear for a treatment facility depends on a variety of factors such as:
- Sludge quantity and composition - How a lot space is available for gear - How quickly the sludge dewatering must take location - Operator encounter and preferences - Odor control preferences - How the sludge cake may be used, such as land applications, landfill disposal, alternative fuels, or additional processing for some other purpose
A professional service should be consulted to help evaluate the facility's needs to ensure the best, most effective system is being used for its specific applications.
