This inventor holds 10 USPTO granted patents and 1 published patent application, plus 1 CIPO patent and 1 EPO patent. Top assignees: American Peat Technology, LLC, Regents of the University of Minnesota. Active years: 2012-2026.
Location History:
- Brainerd, MN (US) (2012 - 2014)
- Crosby, MN (US) (2017 - 2023)
Company Filing History:
10 out of 10 
6 out of 2,364 
Years Active: 2012-2026
Title: Douglas A. Green: Innovator in Wastewater Treatment Solutions
Introduction
Douglas A. Green, an accomplished inventor based in Crosby, MN, is renowned for his significant contributions to wastewater treatment technologies. With a portfolio boasting eight patents, he has developed innovative solutions focusing on the selective sorption of metal ions and the treatment of anions in aqueous solutions.
Latest Patents
Among his latest patents are groundbreaking inventions aimed at enhancing water treatment processes. One notable patent details a weak ion exchange particulate medium prepared from phenol-containing organic matter for removing anions contained in aqueous solutions. This process involves creating a granulated weak anion exchange medium from peat through low-temperature torrefaction, followed by chemical pretreatment processes. The resulting medium proves effective for wastewater treatment, particularly in environments with low pH.
Another significant patent involves a particulate medium crafted from partially decomposed organic material for selective sorption between competing metal ions in aqueous solutions. This invention outlines a method to prepare a granulated sorption medium from peat, which undergoes thermal activation and chemical treatment to target more-toxic metal cations, such as cadmium and lead, in wastewater. This dual-action approach enhances wastewater treatment efficiency by enabling selective adsorption of harmful metals.
Career Highlights
Douglas has made substantial strides in his career, holding pivotal roles at American Peat Technology, LLC and the University of Minnesota. His work at these institutions has allowed him to blend academic research with practical applications, furthering advancements in environmental technologies.
Collaborations
Throughout his career, Douglas has collaborated with distinguished colleagues, including Igor V. Kolomitsyn and Peggy Wallgren Jones. These partnerships have enriched his research and contributed to the development of innovative wastewater treatment solutions.
Conclusion
Douglas A. Green's innovative contributions to wastewater treatment highlight his expertise as an inventor dedicated to improving environmental sustainability. His patents reflect a profound understanding of chemistry and environmental science, showcasing his capability to solve complex problems in water treatment. Through his groundbreaking work, he continues to impact the field positively, making strides toward cleaner and healthier water systems.