Bio-Energy Wastewater

Targeted and Comprehensive Solutions

Our wastewater treatment team can support bio-gas generation by helping you to assess and economically treat digester wastewater. We have solutions ranging from ammonia load reduction, to selective contaminant removal to closed-loop ZLD, and everything in-between.

Improve Freshwater Recovery






selective ion removal 2-icon






Biogas Wastewater

Biogas-producing anaerobic digesters produce methane gas from organic wastes. The methane can then be used in transportation, power generation, or heating. Digesters also produce wastewater, which cannot usually be re-used directly or discharged into a public sewer. 


Depending on the digester feed and other factors, typical wastewater issues include total suspended solids (TSS), total dissolved solids (TDS), ammonia, biological oxygen demand (BOD), and chemical oxygen demand (COD). Depending on project needs, treatment involves the application of various technologies. Options range from reducing TSS and ammonia (nitrogen), to targeted selective contaminant removal of metals (e.g. zinc), up to a comprehensive ZLD process.


A wastewater aeration tank for the treatment of ammonia
Overview of a comprehensive treatment solution for digester wastewater with MLD/ZLD options (not all steps are necessarily required).

Digestate Wastewater Management

To decide on an appropriate and cost-effective treatment process, it is critical to know the wastewater chemistry in detail and understand the treatment goals. Saltworks can review water chemistry and specific project requirements so that a digester wastewater treatment process is delivered that balances simplicity, cost-effectiveness, and reliability. We can also help to inform your total plant mass and options analysis. Contact us for project reviews, water testing, pilots, and more.

Extended Article: Anaerobic Digester Wastewater Management During Biogas Production

Anaerobic Digester Wastewater Management During Biogas Production

Anaerobic Digester Wastewater Management During Biogas Production Targeted and Comprehensive Solutions Learn More Request More Information Key Takeaways Digester wastewaters are by-products of biogas production in anaerobic digesters. They require treatment prior to disposal. To meet regulation compliance, treatment options range from minor interventions such as selective contaminant removal, to major interventions such as minimum and zero liquid discharge (MLD/ZLD). Ammonia in digester wastewaters can be selectively removed by stripping, biological treatment, and chemical methods. Selection of options requires careful consideration of local conditions, energy sources, economic usability of the end-products, and most importantly the specific wastewater chemistry, such as

Read More »

Bio-Energy Wastewater Related Products

XtremeRO Brine 


Xtreme Reverse Osmosis device Saltworks Technologies

Next-generation water-maker and brine-concentrator based on reverse osmosis that achieves extreme freshwater recoveries, enabling cost-effective brine management and treatment of challenging organic-laden waters including oil & gas produced waters.


Learn More …



Modern, modular, and intelligently automated evaporator-crystallizer that concentrates brine or produces low volume solids for zero liquid discharge.





Learn More …




The first evaporator-crystallizer with no atmospheric contact, important for water with volatile organics. Choose between no liquid water return or clean water that is safe for discharge.





Learn More …

XtremeUF Ceramic Ultrafiltration System

XtremeUF Ultrafiltration System

An ultra-robust ceramic based ultrafilter that can remove suspended solids, oils, and grease from the most challenging slurries and impacted wastewaters. XtremeUF cleans itself as it operates, to ensure your membranes maintain performance.


Learn More …

Bio-Energy Wastewater Related Resources

Get Your Project Assessment

Get More Information on Bio-Energy Wastewater Solutions & Products