Gross-Wen Technologies (GWT) has developed an innovative wastewater treatment solution known as the Revolving Algal Biofilm (RAB™) System, which utilizes algae to effectively recover nutrients from wastewater. This system operates by employing vertically oriented conveyor belts that promote the growth of algae, which in turn consumes nitrogen and phosphorus from the wastewater while harnessing sunlight and carbon dioxide. The resulting nutrient-rich algae biomass is harvested and processed into slow-releasing algal-based fertilizers, providing a sustainable and economical approach to wastewater treatment. The RAB™ System is designed to minimize energy consumption and operational costs, eliminate the need for chemical inputs, and produce sellable algae byproducts, making it a cost-effective solution for various municipal and industrial applications.

The RAB™ System is versatile and can be integrated into existing wastewater treatment facilities to enhance nutrient removal and comply with stringent discharge regulations. It serves multiple functions, including pre-treatment for industrial facilities facing high surcharge rates, secondary treatment for additional nutrient removal, and retrofitting for fixed-film plants to meet total nitrogen and phosphorus permits. Additionally, the RAB™ System is effective in treating nutrient-dense sidestreams from wastewater treatment plants and agricultural anaerobic digesters, helping to reduce greenhouse gas emissions and improve biogas revenue. Overall, GWT's algae-based technology represents a significant advancement in sustainable wastewater management, offering reliable, effective, and environmentally friendly solutions.

United States

Gross-Wen Technologies uses its patented wastewater treatment technology, known as the revolving algal biofilm system (RAB), to cost-effectively recover nutrients such as nitrogen and phosphorus from wastewater. Compared to other treatment options, our system is significantly more affordable and produces algae biomass which can be sold as a slow release algal fertilizer or bioplastic.

Gross-Wen Technologies

Company Details