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Hydrotech's Sludge Thickening Beltfilters

Beltfilter top-side view

Your new key to efficient filtration of heavy-loaded water and radical reduction of sludge handling.

Fields of use:

The Hydrotech belt filter is designed to thicken sludge when used in conjunction with a polymer mixing system. Typically, sludge from a Hydrotech drum or disc filter has a dry matter content of 0.030-0.050% (300-500 mg/litre).

beltfilter outdoor photo

After passing through the Hydrotech Belt Filter System, the dry matter content increases to 8-12%. This means the volume of de-watered sludge has been reduced by a factor of 150-250!This radical reduction of sludge translates to lower costs for sludge storage, labor and handling.

The Hydrotech Belt Filter System compliments traditional solids handling practices such as vacuuming or brush and flush methods by eliminating settling ponds. When solids remain in the water column they break down, leaching nutrients (phosphorus, nitrogen) into the water. This is referred to as nutrient leaching. By directing the sludge to Hydrotech's Belt Filter System, the solids are efficiently removed from the water column. The dewatered sludge, no longer in the water column, is now in a form for easy transport and disposal.

How It Works

Beltfilter Diagram

The Beltfilter System is also great for rough screening to remove large debris (leaves, sticks...) from intake water.

Technical specifications for Hydrotech Beltfilters (HBF)
Filter Type (HBF) 521 537 1042 1074
Gear Type s40 s40 s40 s40
motor effect (kw) 0.18 0.18 0.18 0.18
no. of poles 4 4 4 4
no. of nozzles (pcs) 6 6 12 12
rinse water conn. 3/4" 3/4" 3/4" 3/4"
pump type, 50 hz (grundfos) cr2-90 cr2-90 cr2-110 cr2-110
pump effect at 50 hz (kw) 1.1 1.1 1.1 1.1
pump type, 60 hz (grundfos) cr2-60 cr2-60 cr2-70 cr2-70
pump effect at 60 hz (kw) 1.1 1.1 1.5 1.5
rotating brush motor, optional (kw) 0.12 0.12 0.12 0.12
inlet/outlet (mm) 110 110 110 110
sludge outlet (mm) 110 110 635x123 635x123
rinse water flow at 7,5 bar (l/s) 0.40 0.04 0.80 0.80
frequency converter yes yes yes yes
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