When a liquid sludge is produced, further treatment may be required to make it suitable for final disposal. Typically, sludges are thickened (dewatered) to reduce the volumes transported off-site for disposal. There is no process which completely eliminates the need to dispose of biosolids. There is, however, an additional step some cities are taking to superheat the wastewater sludge and convert it into small pelletized granules that are high in nitrogen and other organic materials. In New York City, for example, several sewage treatment plants have dewatering facilities that use large centrifuges along with the addition of chemicals such as polymer to further remove liquid from the sludge. The removed fluid, called centrate, is typically reintroduced into the wastewater process. The product which is left is called “cake” and that is picked up by companies which turn it into fertilizer pellets. This product is then sold to local farmers and turf farms as a soil amendment or fertilizer, reducing the amount of space required to dispose of sludge in landfills.

Prime Solutions rotary fan press is the premier equipment used for dewatering processes and sludge handling. Their years of experience in the dewatering industry resulted in designing the best liquid/solid separation equipment and patent pending Prime Rotary Fan Press. It has few mechanical parts and is slow moving. The Prime Rotary Fan Press is a compact, efficient, cost effective unit with extremely low maintenance and operating costs. It’s continuous process is totally enclosed, eliminating odor and reducing corrosive exposure to nearby equipment. The Prime Rotary Fan Press is simple to operate requiring very little supervision and features a semi-automated self-clean cycle.

Rotary Press