Treatment of 60m3/h of effluents, loaded with TSS and reuse in industry
How to recycle cutting water in the kitchen manufacturing industry?
The kitchen factory was therefore recycling industrial effluents to limit waste. The water cooled the stone cutting saws. It was imperative to recover and reuse it. The factory recovered this water, loaded with fine and mineral particles. Then, it optimized it. A buffer tank collected the water before physicochemical treatment. Consequently, coagulation, flocculation and lamellar settling effectively separated the contaminants. Thus, the water met strict quality requirements. Finally, it could be recycled.
Would you like to see the video explanation? Click here
How is the stone cutting industry reinventing water recycling?
The kitchen manufacturing industry was looking to recycle water to limit waste. Our client wanted to implement a recycling system to cool the saws. This allowed for reduced water consumption and costs related to its use. The objective was to recover the water while eliminating fine mineral particles. Moreover, the solution had to adapt to space constraints and specific site operations.
This recycling process requires the following elements:
- The process water flow varies according to the use of saws, with a maximum of 50 m³/h.
- A buffer tank smoothes the flow upstream of the lamella clarifier.
- The process uses coagulation, flocculation and settling.
- The installation is compact and modular to fit into the limited space of the plant.
- The installation is located outside the building.
- A sand filter finishes the job.
Optimization of cutting water treatment through jar tests
In this cutting water recycling project, the team found laboratory tests essential for adjusting the process. First, these tests simulated the coagulation and flocculation of fine particles in the water. These particles mainly came from micro-sand and minerals from the cut stones. Then, the team determined the optimal dosages of coagulants and flocculant. This allowed for reducing flocculation times to 5 minutes, a considerable time saving compared to conventional processes. Thanks to this efficiency, the team designed more compact installations. Thus, the necessary space and associated costs were reduced.
The tests revealed certain challenges, notably the presence of sticky and heavy sludge, which complicated pumping. Thus, the team adjusted the polymer rates that were too high to reduce them while maintaining satisfactory performance. These adjustments then facilitated sludge extraction and improved system management. Moreover, the decrease in rates reduced operational costs related to sludge management. Finally, the tests adapted the system and ensured efficient water recycling, while respecting requirements.
Settling tank-coagulation combination: A process adapted to industrial water recycling
The proposed solution uses an advanced treatment process to meet the challenge of water recycling. First, this process includes coagulation, flocculation, and lamellar settling steps, designed to treat cutting waters. Next, the factory had to recycle up to 60 m³/h of water used to cool the saws. These waters contained suspended solids, mainly fine mineral particles and micro-sands. The objective was therefore to install an efficient system to treat these effluents while respecting space constraints. Finally, this solution had to adapt to restricted dimensions, while ensuring optimal water management.
Concrete results: Reduction of waste and optimisation of resources
Optimization of cutting water treatment
The cutting water treatment project exceeded expectations. First, the optimization of coagulation, flocculation, and lamellar settling achieved a 98% reduction rate of materials. This guarantees quality water, suitable for recycling in the industrial process. Next, the compact and modular design of the installations reduced the necessary space. Finally, this optimization facilitated their integration and reduced infrastructure costs and production interruptions.
Reduction of waste
Precise adjustment of polymer rates solved the problems of sticky sludge and made pumping more efficient. It also reduced sludge management costs. This optimisation then strengthened the sustainability of operations. It has also opened up opportunities for expansion to support future growth. So this project shows how a well-calibrated solution turns a challenge into a strategic advantage.
Project stages :
- We design the lamella clarifier.
- We design a solution tailored to the specific constraints of the site.
- We manufacture and integrate electromechanical equipment.
- We deliver and install the equipment on site.
If you have any questions about a similar project, please do not hesitate to contact us using the dedicated form.
-
Outdoor monobloc lamella clarifier DLME-2L
Lamella clarifiers -
Outdoor coagulation flocculation CFE-L
Coagulation flocculation
Year of completion
2022
