Gross-Wen Technologies

GWT’s RAB system adapts to various applications, helping facilities meet stricter wastewater discharge permits.

RAB treatment system helps municipal wastewater facilities meet stricter limits and enhance removal process.

The company’s patented technology recovers nutrients from wastewater using algae, then turns the algae into slow-release fertilizer.

Agreement accelerates growth into the industrial wastewater market and builds on the successful deployment of complementary technologies.

In 2014, Gross-Wen Technologies was founded by Dr. Martin Gross and Dr. Zhiyou Wen at Iowa State University while developing GWT’s sustainable RAB system to help municipal and industrial clients effectively treat wastewater in more economical and reliable ways.

The system grows algae on a rotating film using atmospheric CO₂ and sunlight, with the film moving in and out of a wastewater reservoir.

Gross-Wen Technologies Inc. files a patent application for an algae-based bioenergy system that integrates wastewater treatment with biofuel production. The system aims to convert organic waste into renewable energy while addressing municipal wastewater challenges. The firm specializes in bioenergy solutions for industrial and municipal applications.

Sep 2026Renewable Energy Magazine, at the heart of clean energy journalismNews article

Xylem and Gross-Wen Technologies (GWT) collaborate to integrate anaerobic treatment and nutrient removal solutions for industrial wastewater. Their partnership combines Xylem’s treatment platform with GWT’s **Revolving Algal Biofilm (RAB)** system, following a successful pilot in **Pasco, Washington**. The goal is to help facilities comply with stricter nutrient discharge regulations and sustainability requirements.

Jun 2026scanx.tradeNews article

The state of Iowa allocates **$1 million** to **Gross-Wen Technologies** to fund algae-based solutions for water purification. The company’s process targets air and waterway cleanup, organic crop growth, and sustainable aviation fuel production. Founder **Martin Gross** explains the technology’s potential to address environmental and agricultural challenges.

Mar 2026Iowapodcast.comNews article

The Iowa Economic Development Authority (IEDA) Board approves job-creation incentives for five companies, supporting **536 new jobs** and **$268.2 million in capital investment** across Iowa. Projects span locations including Bettendorf, Bondurant, and Hiawatha. The approvals also include funding for quality-of-life and innovation initiatives.

Feb 2026Economic Development & Finance AuthorityNews article