Dewatering: An Overview

Waste disposal is an important part of many industries and is a normal process for companies and public entities that deal with waste produced from sanitation systems. The sludge that is produced by sanitation systems needs to be properly dealt with before it is safely disposed of. Dewatering is a process that makes this semisolid waste easier to deal with and dispose of. What is mechanical dewatering? Mechanical dewatering is a process used to separate sludge into solid and liquid waste for easier management.

How Dewatering Works

The process of dewatering is a multi-step mechanical process that can make use of various methods to separate solids and liquids. Three main methods of doing this job are belt filter presses, centrifuges, and chamber filter presses. Each method uses a detailed and specific process to break down sludge into more manageable byproducts.

  • Belt Filter Presses: The belt filter press applies pressure continuously to squeeze the water from the sludge fed into it. The sludge is pressed between tensioned belts that apply intense levels of pressure to reduce the sludge to a solid object.
  • Centrifuges: This method of dewatering is designed to be run continuously. Centrifuges remove solids by using continuous motion to thicken solids and pump the resulting slurry out of the other end. Liquids are drained through a separate pipe.
  • Chamber Filter Presses: These are designed to filter the liquid from the sludge and collect the solid parts of the sludge substance in a separate chamber. The sludge is pressed through a cloth filter serving as a high-pressure strainer. This separates solids from liquids, allowing the solid components to be collected, shaped, dried, and safely disposed of.

Any of these devices can be a proper solution for dewatering and waste disposal depending on your specific needs.

Advantages and Concerns of Dewater Systems

Dewater systems are practical because they offer high levels or capacity for sludge separation, are mostly automated and therefore are easy to use, and reduce sludge volume, making it easier to store and safely depose of.

However, it is important to be aware of possible downsides when using these systems, so you know what to expect. These systems are expensive and commonly only see use in larger treatment operations. They also require expert maintenance and regular professional upkeep, as well as consistent power to run. Also, it should be noted that while these systems do separate sludge into easier-to-manage components, they do not serve as treatment systems. The resulting byproducts are still hazardous and require further treatment to remove pathogens and be made safe.