ExCalibAer
Source: Thermal Process Systems
ExCalibAer™ is the cutting-edge solution for wastewater resource recovery facilities (WRRFs) seeking to maximize efficiency, sustainability, and energy production. By integrating advanced digestion stages with innovative nitrate recycling, ExCalibAer optimizes digestion by adding nutrient removal, turning challenges into opportunities.
The Power of the Nitrate Pathway
Traditional anaerobic digestion sets the stage for the sulfate pathway, which produces corrosive hydrogen sulfide (H₂S) and consumes more carbon, leaving less available for methane production. ExCalibAer disrupts this process by introducing nitrate recycling:
- Higher Methane Yield: Nitrate recycling prioritizes methane production, increasing biogas energy potential by up to 25%.
- Lower H₂S Production: H₂S levels in biogas are reduced by up to 99%, improving safety, reducing odors, and lowering maintenance costs.
Enhanced Process Control
ExCalibAer incorporates advanced monitoring and control mechanisms, ensuring optimal conditions at every stage:
- Continuous Monitoring: Temperature, pH, and Oxidation-Reduction Potential (ORP) sensors ensure precise control.
- Automated Adjustments: Intelligent systems respond to fluctuations, maintaining stable digestion processes and reducing operator intervention.
- Biological Controls: The pH control provided by the recycle of aerobically digested material maintains phosphorus solubility, reducing concerns over struvite precipitation and the need for chemical adjustments.
Integrated Nutrient Management
- Nitrogen Removal: Through Nitrification-Denitrification steps within the reactors, ExCalibAer™ significantly reduces nitrogen loads in the liquid return stream from dewatering.
- Phosphorus Recovery: Phosphorus is kept soluble throughout the digestion process, making it available for economically feasible recovery and addressing nutrient recycling issues.