The TEKNOBAG® DRAIMAD® system dewaters and bags
sludge from water and effluent purification plant. The heart of
the system is the special filtration sack made from "TNT" water
The sacks are mounted on a special stainless steel frame, designed to give even sludge distribution.
The system is electronically controlled from a programmable control panel, ensuring correct process operation.
After a few hours operation, dry solids contents of 15-30% can
be achieved, depending on the nature of the sludge. The volume
of dewatered sludge produced is dependent on the solid content
of raw and dewatered sludges and, with raw sludge contents of
1% dry solids, one machine can treat up to 20m3 per day.
After the initial dewatering stage on the machine, the sacks are sealed and removed with a special sack trolley and stored in the open. During this second phase, sludge weight and volume
continue to reduce, regardless of weather conditions.
The special water repellent material of the sacks prevents
rainwater from entering but allows dehydration of the contents
After two months storage, a cake of 50-95% dry solids content is produced.
As an example, 1m3 of sludge at 1% solids content would give, after two months, a cake of at least 50% dry solids content. This would weigh only 25 Kg and represents a 40-fold reduction of the original weight.
Various models are available, with 2, 3, 6 and 12 sacks. Operation may be manual, with filtration taking place under gravity, or automatic with pressurised filtration. Multiple units may be installed, either in series or in parallel, to meet all requirements. The various models feature:
Pressurisation using low pressure air ( 0.2 - 0.3 bar) almost doubles the capacity of the units. The sacks are mounted in stainless steel cages designed to allow rapid sack replacement.