Bioenergy Industry Solutions
Digestate, process water, and biogas upgrading solutions for anaerobic digestion and CBG plants
Industry Overview
Bioenergy Industry Solutions
Bioenergy facilities—anaerobic digestion plants, compressed biogas (CBG) units, and co-digestion sites—generate process wastewater and digestate that require careful management. Effluent from digestate dewatering, condensate, and wash water carries residual organics, nutrients, and ammonia. Discharge standards and nutrient recovery goals drive the need for robust treatment and valorization.
Spans Envirotech provides integrated solutions for digestate separation, liquid stream treatment, nutrient recovery, and biogas upgrading. Our systems help bioenergy operators meet discharge limits, recover nutrients for fertilizer use, and maximize biogas yield and quality.
Industry Challenges
Key Environmental Challenges
Digestate Liquid Stream Management
Centrate and filtrate from digestate dewatering are high in ammonia, COD, and phosphorus. Treatment must reduce organics and nutrients to meet discharge or reuse criteria while managing variable flow and composition.
Process Water & Condensate
Condensate from biogas upgrading and process wash water contribute additional load. Combined streams require integrated treatment design to handle peaks and maintain compliance.
Nutrient Recovery & Discharge
Regulations increasingly limit nutrient discharge. Recovery of nitrogen and phosphorus as fertilizers or soil amendments adds value and reduces environmental impact but requires appropriate technology selection.
Our Solutions
Tailored Wastewater Treatment Solutions
Digestate Separation & Dewatering
Screw presses, centrifuges, or geotextile bags separate solid and liquid fractions. Solids go to composting or direct application; liquid stream is treated for discharge or reuse, reducing transport and disposal cost.
Biological Nutrient Removal
Nitrogen removal via nitrification-denitrification or anammox, and phosphorus removal through biological or chemical means, achieve strict discharge limits. Systems are designed for high ammonia and variable carbon.
Nutrient Recovery
Struvite crystallization, ammonia stripping, or concentrate recovery produce fertilizer-grade products. Integrates with liquid treatment to lower discharge loads and create revenue.
Technologies
Proven Technologies for Your Industry
Benefits
Why Choose Spans for Your Industry
- Manages digestate and process water in a single integrated approach
- Nutrient recovery reduces discharge and can generate revenue
- Supports biogas/CBG plant compliance and sustainability goals
- Robust design for variable feedstock and flow
Ready to Transform Your Bioenergy Industry Solutions Operations?
Let our experts design a custom solution for your facility.