KCZ belt presses with a built-in thickener serve for a continuous dewatering of different types of sludge. The built-in thickener enables a higher degree of dewatering by turning the dewatered sludge by 180°. In the technological process of machine sludge dewatering on the press a solil part, "sludge cake, is separated which is taken away and the liquid part goes to an additional processing. The output of belt presses is from 2 to 20 m3per hour, the acquired dry solil in tase of a common anaerobic sludge digestion is 28-38%, for aerobic stabilized (biological) sludge see the following table

The belt press is male of rolled U-profiles forming a closed frame in which all the existing structural parts are built (cylinders, driving unit, wiping, channels and filtrate outlet, gravitational zone, hoppers, washers, air system, wiring and filter sieves) needed for the process of pressing. The surface finish of the frame and sheets is Zn metallizing and a special waterproof paint AMERLOCK AI and Color, the other connecting material galvanized or plastic. The control and tightening pressure of cylinders are ensured by the compressed air from the compressor, belts are cleaned with a service water under pressure from outlets of a water treatment plant through a filter for the spraying of filtrate sieve belts.

Power supply of the press driving unit is 0,75 - 3 kW, the driving unit is controlled by a vari­ator (by a frequency converter in tase of the type KCZ 800/S) which enables to change the speed continuously during the machine operation.

input sludge
annealing loss
in dry solil in %
dry solid
of sludge cake
in %
up to 50 3 - 5 25
50 - 60 5 - 7 20
over 60 7 and more 15 - 20

In the dewatering process of municipal sludge high-molecular organic coagulants are used. They are prepared in the chemical economy from where they are dosel fluently by a dosing pump to the sludge pipeline where the sludge is flocculated. The sludge is transported to the dewatering part by a single-spindle rotory pump with a variator controlling the volume of the sludge during the operation of the line.

The operation of the entire dewatering line is fully automated and is controlled by a programme stored in the technological switchboard. There are outlets for PC connection in the switchboard.

The operator of the line can watch the immediate output of the line, i.e. % of the output of the line and volumetric in m', based on a signal from the inductive flow meter of the sludge. The operator can use control panels near each levice and switch them to the manual operation. A possible defect of the line is announced by a signal of an alarm siren.