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).
Bio-Energy Wastewater Treatment
Targeted and comprehensive solutions for bio-gas wastewater
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.
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.
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.
Bio-Energy Wastewater Related Products
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.
XtremeUF Ceramic 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.
Bio-Energy Wastewater Related Resources
Excessive phenolic compounds are harmful to human health and the environment. Chlorophenols, by-products of chlorinating phenol-containing water, are carcinogens. A treatment system needs to be chosen and engineered carefully, with consideration of specific wastewater chemistry, operating conditions, and economics.
Zero Liquid Discharge (ZLD) and Minimal Liquid Discharge (MLD) Become Lower Cost Through Reverse Osmosis Innovation
Saltworks is pleased to announce that recent advancements in reverse osmosis technology are now commercially available. Reduce conventional RO brine volumes by 50%, achieving brine concentrations of 130,000 to 150,000 mg/L TDS with spiral wound RO membranes.