Why manure valorisation?
The tightened laws and regulations concerning manure processing call for alternative processing methods. Large-scale manure processing initiatives in the south of the Netherlands show that they have many benefits, including a lower output price, as well as compliance with laws and regulations. And yet it is difficult to get initiatives going in the east of the Netherlands. Twence nevertheless has the intention of building a large-scale 250,000 tonne manure valorisation plant by mid-2017.
Manure contains phosphate, a raw material which is scarce worldwide and is essential to the cultivation of (food) crops. The surplus of manure in the Netherlands has resulted in excessive amounts of phosphate in the soil. It leaches into the groundwater and can cause the undesirable growth of algae and plant species.
In building a manure valorisation plant, Twence will help the agricultural sector on a financial level but also in sustainable business operations. This will furthermore retain employment in the region, and Twence will contribute to the recovery and reuse of raw materials.
The sketch shows the transformation process according to the techniques used by Twence in the manure valorisation plant.
General technical principles:
- Integrated plant for anaerobic digestion and sorting;
- Mono-manure anaerobic digestion: no addition of co-products;
- Use Best Available Technology (BAT);
- Closed system and stable business operations prevent the emission of greenhouse gases and deliver a more constant quality of raw materials and biogas.