Enthoven Techniek carries out a unique assignment for the Rivierenland Water Board
In September 2019, Enthoven Techniek received a unique request from the Rivierenland Water Board: they will be constructing a separate sewer system with their own water purification system, which is intended for processing the wastewater from the horticultural sector. The order for the Enthoven Techniek disinfection units, which removes pesticides from wastewater, was confirmed in March 2020, and construction is now in full swing. This specifically concerns the Apollo water purification system. What makes this project so special? And what is the background of this horticultural technical installation?
Since 2018, greenhouse facilities have been obliged to rid wastewater of all pesticides. Usually, Enthoven Techniek supplies the necessary water purification systems directly to these greenhouses. For the first time in history, this request came from the government. The Rivierenland Water Board wished to centralise the operation and carry out purification activities for the entire Bommelerwaard region. Breeders in this region can then join in a subscription form.
Philip Eekma (Commercial Manager, Enthoven Techniek) explains: “The customer found us through an agricultural organisation. After we explained our Apollo water purification system, we specified the customer’s wishes and Enthoven Techniek was chosen. The special thing about this project is the size (10 units). Besides, this concerns a sector outside horticulture and it is the first Water Board to centralise the removal of pesticides.”
Ten units of these disinfection units, The Apollos will be placed in this old treatment silo.
12.5 cubic meters per hour per unit,
will be used in the sewer system.
The (Apollo) journey of wastewater
The wastewater from the greenhouse facilities in the Bommelwaard is pumped to an existing collection basin belonging to the water board in Zaltbommel via a new +/- 35 km sewer system (implemented by third parties). From there, the Enthoven Techniek installation sucks up the water to the scalable units (Apollos) where it is centrally stripped of the pesticides according to the BZG decision. “The Apollo works by using low-pressure UV in combination with hydrogen peroxide; the water is pumped from these units into the sewer basin where it receives the standard after-treatment. It is controlled by a stand-alone PLC (Programmable Logic Controller). No additional resources are required, and there is no chance of hazardous gases being released. All this makes the system safe, easy to operate and easy to maintain”, says Philip. The purified horticultural water is then pumped into the river Waal. According to current planning, more than 50 pumps will push wastewater from +/- 250 hectares of greenhouses to this system by the end of this year.