| The client’s needs
The existing treatment plant, which is obsolete and already heavily loaded, will not be able to handle the estimated 30% increase in effluent.
In order to continue to comply with the discharge standards, Limelco has entrusted VWT Belgium with the construction of a new wastewater treatment plant with a capacity of 2,880 m³/d.
| The solution
This future installation will consist of two buffer basins, pre-treatment with screening and flotation, aerobic treatment in the form of a membrane bioreactor (MBR) with nitrogen and phosphorus removal and sludge treatment. This will ensure that the water quality of the effluent is suitable for discharge to surface waters.
In addition, in an effort to reduce its environmental impact, the client has approved the integration of a reverse osmosis plant allowing the reuse of its effluent. This unit will be composed of a CaptuRO system, a major technological innovation of the VWT group. This is a semi-batch reverse osmosis plant that allows for higher hydraulic recovery while minimizing the potential for membrane scaling and fouling.
| Process description
A pre-treatment will be set up with a physico-chemical unit + DAF followed by an aerobic post-treatment with MBR. The latter will be connected to the CAPTURO for water reuse in production.
The biological sludge and the sludge from the DAF will be dehydrated by a centrifuge and transported to an external digester.
| The client
Limelco is a producer of dairy products located in Zonhoven, Belgium. Its production capacity is planned to be further expanded in the coming years, including a new butter production line.
Key figures
2 880 m3 day flow of WWTP
90% hydraulic recovery
| The benefits
- Compliance with discharge standards
- Reduction of the ecological footprint on water
- Reduction of discharge costs
- Saving on chemicals
- Energy savings