Ultrafiltration - Import export

Ultrafiltration and microfiltration differ depending the pore size used. Ultrafiltration can filter out bacteria, viruses and other organisms. Both methods are also applied in the field of water recycling. They sperate undissolved and colloiddissolved solids.

Ultrafiltration of surface water For separation of dissolved substances, ultrafiltration is applied apart from conventional pre-filters (sand and gravel filters). So, all solids and even bacteria, viruses, germs and colloidal components (iron, orthosilicic acid) are retained.

Ultrafiltration of kathodic deposition paint The filtrate of the ultrafiltration is added to the immersion bath by a spray ring, which is installed directly over this bath. So, the recovery of the remaining color is possible and by separation the color particles, painting defects can be avoided. In the last spray zone, organic solvents from the ultrafiltration are washed away be demineralised water. Concentrated with these solvents, the water is leaded into the color bath. The process is a closed loop without any waste waters. The paint bath can be contaminated with pre-tretment chemicals like e.g. phosphates, chlorides, chromates. so, a part of ultrafiltrate has to be leaded out to avoid concentration of the paint bath with these chemicals. If no ultrafiltration is used, big amounts of waste waters will arise, which are difficult to dispose. Our ultrafiltration plants are customized in membrane are, retention rate and membrane type.

Disposal of oil emulsions by ultrafiltration Increasing disposal costs and laws about oil disposal make a treatment of oily emulsions right necessary right where they come up. The main target of this treatment is the reduction of waste volume as much as possible. Ultrafiltration is one possibility to separate even stabile emulsions. Like chemical methods and flotation, ultrafiltration can not be used as stand-alone solution. Only by an effective pre-treatment and a pre-treatment of the oily concentrate, an optimized and economical emulsion disposal can be guaranteed. By the pre-treatment, coarse particles and free oil is separated; the pre-separation dewaters and concenctrates the flow, which comes as concentrate from the ultrafiltration. So, a maximum of dewatering and concentration of the oil can be reached. The emulsion is pumped through the membrane modules of the plant. On the membrane surface, oil is separated from the waste water. Waste water will pass the membrane and is colle