NEWS - BIOFUELS
“ Kumac ” Becomes “ WELTEC BLUE WATER ”
New brand name for manure and digestate processing from WELTEC BIOPOWER
“ WELTEC BLUE WATER ” now replaces Kumac . With this new name , WELTEC BIOPOWER is responding to the international market requirements of its proven liquid manure and digestate processing . In recent years , 17 plants have already been put into operation worldwide . The first WELTEC BLUE WATER plant in Germany has also been running since March 2024 . In several process steps , the resulting raw materials are fully automatically converted into compost , fertilizer , animal bedding , biogas substrate and , depending on the input material , up to around 60 percent of dischargeable water .
The name WELTEC BLUE WATER thus reflects the growing global demand on the one hand and refers to the largest output of water on the other . Plants in Europe , Asia and the USA are currently under construction and in advanced project development . The first references in Japan and Spain for the easily scalable systems are nearing completion . The technology is proving to be interesting for companies in processing regions where there is a high supply of manure or water shortages - such as in Denmark and Spain . In Europe , investments are therefore also being promoted by the European Agricultural Fund for Rural Development ( FEADER ).
WELTEC BLUE WATER technology is also suitable for nitrogen separation and returning the water to the biogas process to dilute the raw materials . A high proportion of nitrogen-rich input materials such as poultry manure for the production of biogas is possible with the system . In comparison to other systems , WELTEC BLUE WATER does not require any heat energy and converts the separated solids into high-quality fertilizer .
Can be used from 50,000 tons per year are separated using a multi-stage reverse osmosis system . The nutrient concentrate can be applied as an easily transportable liquid fertilizer . After treatment in the ion exchanger , water remains that can be discharged and used or ultimately returned to the water cycle . This means that up to 60 percent of storage capacity for fermentation residues can be saved and no containers need to be built for this .
The advantages of “ WELTEC BLUE WATER ” at a glance :
• Around 99.5 percent of the phosphorus and around 70 percent of the nitrogen are bound in the solid phase
• Tried and tested , mature technology with high plant availability
• Increased transportability and lower application costs due to nutrient concentration
• Significantly fewer transports for the application of the digestate
• Compliance with restrictive fertilizer and emission regulations at low cost
• Higher nitrogen concentrations of the input materials in the biogas plant possible due to the cycle without a heat source
• Significant reduction in storage volume for liquid manure and digestate
• Modular design , therefore scalable
• Fully automatic operation
• Diverse marketing options for the solid phase as fertilizer , bedding or compost
WELTEC BLUE WATER separates the solids from the water in a multi-stage process . Depending on the dry matter content of the input material , the distribution of the separated materials can vary . An independent study of the processing plant in Deurne in the Netherlands by the Lower Saxony Chamber of Agriculture in 2015 , for example , resulted in the following segmentation : 55 percent dischargeable water , 25 percent solids and 20 percent liquid nutrient concentrate . At the beginning of the process , additives are mixed into the starting materials to increase efficiency . This causes the finest components to flocculate and make them easier to separate . At the same time , certain substances are better separated from one another and odor emissions are minimized . The digestate is then dewatered in a belt press . The solids , with a dry matter content of around 30 percent , are used or sold by users as fertilizer , compost , animal bedding or as a biogas substrate . The system is modularly scalable and can be used from 50,000 tons per year .
Water can be used
The separated liquid from the belt press is aerated in a flotation tank - this causes particles and suspended matter to settle on the bottom of the tank . This sludge is added back to the process . In the final step , up to 99 percent of the dissolved salts and nutrients
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