Screw press dehydrator / Sludge drying, Recycling drying

There are a lot of kinds of dehydrator for sludge arises from wastewater treatment plants. Among them, screw press dehydrator performs dehydration by squeezing and filtering while screw blades are rotating.

■ Screw press dehydrator

A screw press dehydrator is configured by screw blades and mesh patterned cylindrical screens around it. Space between the blades and the screen becomes narrower as it comes near outlet.
After condensed and conditioned sludge are fed to the dehydrator, water dropped off from screen as sludge is conveyed by rotating screws, so that the sludge is dehydrated.
Sludge are sheared into small fragments as screw blades rotate, and it is squeezed and dehydrated since space between the blades and screen become narrower as it comes near outlet.
Screw press dehydrator is an apparatus which dehydrate by shearing and squeezing sludge with screw blades.

One of the reasons that KENKI DRYER can dry any sticky and adhesive material, even no matter how high moisture content it has, definitely into low moisture contents is that it has international patented mechanism which shear sludges into small fragment and peel sludge off from blades. Screw press dehydrator has similar mechanism as KENKI DRYER like shearing sludge though, it can be said that filling rate of sludge affect to process for both of them.

As flocculants, polymer flocculation for one-pack type and inorganic plus polymer flocculation for two-pack type are used.


screw press dehydrator wastewater treatment sludge dryer KENKI DRYER 25/05/2020

dewatering waste water treatment sludge dryer kenki dryer 23/05/2020


About types of sludge dewatering / Sludge drying, Recycling drying


■ Sludge drying


Water in the sludge thickened in the sludge thickener tank are removed at dehydration process to a certain degree.
However, moisture content is normally more than 80% and the sludge still has adhesiveness and stickiness. Also, latter processes are not easy because of influence of flocculants. Our drying apparatus of KENKI DRYER with international patented technology can surely dry any sticky, adhesive and viscus sludge, and also materials in liquid state like slurry, without clogging inside of the dryer. Also, because of its simple structure, its price is low and apparatus cost of the dryer can be retrieved by reducing industrial waste disposal cost within 3 years. Dried materials can be recycled as fuel, bacterial fertilizer, soil conditioner, etc. since component of the material is hardly changed because of its low-temperature drying method.
It can be applied to a system with pyrolysis apparatus as well.


Sludge drying

Self-cleaning screw



Please consider KENKI DRYER for drying of sticky materials, adhesive materials and materials in liquid state that no other dryer can deal with.
Initial, running and maintenance costs are low because of its simple structure based on internationally patented technology.
For sludge drying, costs of our dryers are estimated to be retrieved within 2, 3 years by reducing industrial waste disposal cost.
For raw material slurry drying, laborious works of manual operation will be decreased significantly by replacing box shaped compartment tray dryer with our dryer
In case of organic wastes drying, the waste can be recycled as fuel, fertilizer, soil conditioner and feedstuff after being dried.


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Pyrolyzer Biogreen
A pyrolyser with internationally patented technology which use no fire