Process water treatment
With the innovative SPALECK process water treatment system, compound-water mixtures can be efficiently circulated in a closed circuit. Up to 97% of the water used can be saved – and up to 95% of the compound remains in the process. This not only saves valuable resources, but also significantly reduces your operating costs. Recirculation improves process reliability, reduces maintenance costs and meets the highest standards of sustainability and cost-effectiveness.
Our cleaning processes
When treating process water, we differentiate between four types of treatment:
Sedimentation
During sedimentation, the process water is fed into a cascade tank, where it is brought to sedimentation by calming. Abrasions from workpieces and grinding media settle to the bottom. The cleaned water from the last chamber is fed back into the mass finishing system. The sediment residues are removed manually. This process is particularly low-maintenance and cost-efficient.
- For uncomplicated (slightly charged) process water
- Low investment costs
Throughput up to 200 l/h
Centrifugation
Centrifuging is a purely mechanical separation process in which solids are pressed against the outer wall of the centrifuge by centrifugal forces. The clarified water is then fed back into the clean water tank or directly into the process. This method is particularly efficient, low-energy and easy to maintain.
- Most extensive recirculation of the water-compound-mixture
- Only low quantities due to evaporation and carry-over have to be replaced
- Throughput 400-2,000 l/h per system
Precipitation/Flocculation
Precipitation and flocculation is a proven chemical-physical process for removing the finest impurities in process water. The targeted addition of flocculants allows dissolved heavy metals, emulsions and fine solids to be reliably bound. Depending on the legal requirements, the purified water can then be discharged into the sewage system. * The resulting sludge is dewatered using a chamber filter press and disposed of properly.
- Before disposal, suspended solids, emulsified oils and dissolved heavy metals are bound and precipitated by flocculation
- Treatment of different processing liquids in one treatment plant is possible
- Throughput 1,000 – 2,500 l/h
* The disposal of processing liquids into the sewerage system is subject to approval and the legally prescribed values.
Vacuum distillation
Vacuum distillation is particularly suitable for process water with a low solids content and is preferred in demanding applications – e.g. when polishing precious metals or sensitive precision parts. The water is evaporated under vacuum and recovered as a fully demineralized distillate. This can be fed directly back into the process – resource-saving, efficient and environmentally friendly.
- Up to 97 % reuse of the liquid
- Processing at 35 degrees Celsius under vacuum (low-temperature distillation)
- Throughput 20-2,000 l/h
Sustainable process water treatment in mass finishing technology
The resource-saving treatment of process water plays a central role in surface finishing technology. Thanks in particular to our efficient recirculation processes, you can reuse almost all of the water you use. These sustainable solutions help to minimise water consumption, reduce environmental impact and reliably comply with legal requirements – for clean, responsible production.
Our machine portfolio
Recycling centrifuge ZM4
The ZM4 semi-automatic centrifuge is ideal for small to medium-sized mass finishing systems. Its compact design enables space-saving integration into existing system environments. Thanks to its wide range of applications, the ZM4 is one of the most widely used centrifuges in the field of process water treatment. It impresses with its reliability, simple operation and solid separation performance at low operating costs.
Recycling centrifuge ZMT4F
The ZMT4F is a semi-automatic recycling centrifuge with an integrated fresh water tank for buffering. This allows it to supply several mass finishing systems simultaneously and ensure particularly high process stability. For even better cleaning results, the system can be extended with a flocculation unit to efficiently remove the finest particles from the water. Ideal for demanding applications with high quality requirements.
Recycling centrifuge ZA3
Our fully automatic ZA3 centrifuge can be adapted precisely to individual requirements thanks to its modular system. It can be combined with additional components such as process and clean water tanks, agitators or flocculation equipment. An integrated peeling blade reliably removes the settled solids from the rotating centrifuge basket and automatically transports them to a mobile sludge trolley. The ZA3 stands for maximum automation, efficiency and reliable water treatment.
Waste water treatment plant GAB
The GAB is a robust and versatile system for treating a wide range of process liquids. The aim is to ensure safe discharge into the sewage system in accordance with legal requirements. The targeted precipitation and flocculation removes heavy metals, emulsified oils and suspended solids. The result is largely clarified wastewater, while the resulting sludge is disposed of using separate processes.
Vacuum evaporator VD
Our VD vacuum evaporators are specially designed for the treatment of process water with a low solids content. The process is particularly suitable for sensitive and high-quality machining processes – such as the polishing of precious metals. Evaporation of the liquid produces a fully demineralized distillate, which is returned to the production process as pure water. The system is highly efficient and particularly environmentally friendly.
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Frequently asked questions about process water treatment
What is process water treatment?
Process water treatment encompasses all processes for cleaning and reusing water that is used in industrial manufacturing processes, such as vibratory finishing. Contaminants such as abrasive residues, oils, greases and dirt particles are removed so that the water can either be reused in the production process or disposed of in an environmentally friendly manner. Modern treatment plants operate efficiently and sustainably, reducing fresh water consumption and helping to comply with legal environmental standards. This not only ensures the quality of the workpieces, but also makes an important contribution to environmental protection.
What is process water?
Process water is water used in industrial manufacturing processes – for example, for grinding, rinsing, cooling, or cleaning workpieces. In the vibratory finishing process, it plays a central role, as it keeps abrasive media and workpieces in motion while simultaneously absorbing contaminants such as abrasion, oils, and abrasive residues. After use, the process water must be treated for either reuse or environmentally sound disposal. Efficient process water treatment significantly contributes to sustainability and quality assurance in production.