Location History:
- Hitachi, JA (1977 - 1978)
- Hitachi, JP (1979 - 1980)
Company Filing History:
4 out of 42,496 
1 out of 56 
1 out of 26 Years Active: 1977-1980
Title: Kouji Otani: Innovator in Water Quality Detection and Waste Treatment
Introduction
Kouji Otani is a notable inventor based in Hitachi, Japan. He has made significant contributions to the fields of water quality detection and wastewater treatment. With a total of 4 patents to his name, Otani's work has had a meaningful impact on environmental technology.
Latest Patents
One of Otani's latest patents is an apparatus for detecting changes in water quality. This innovative device introduces sample water into a water bath where aquatic life exists. A gas that is sparingly soluble in water and does not affect the biological activities of the aquatics is supplied to the water bath. The gas supplied, along with carbon dioxide generated by the aquatics, is collected to detect changes in the water quality based on the concentration of carbon dioxide. This method allows for rapid detection of toxic materials in water, such as that flowing into a purification plant. Another significant patent is a method for treating wastewater containing sulfur compounds. This process involves introducing wastewater from a wet desulfurization apparatus into ion-exchange towers filled with weak-basic anion-exchange resin. The resin adsorbs thionic acid ions, which are then desorbed using an alkaline solution. The thionic acid ions are decomposed by heating in the presence of acid, resulting in a neutralized solution that is released from the system.
Career Highlights
Kouji Otani has worked with prominent companies such as Hitachi, Ltd. and Hitachi Plant Engineering Construction Co., Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in environmental technology.
Collaborations
Throughout his career, Otani has collaborated with notable coworkers, including Shigeoki Nishimura and Toshio Sawa. These partnerships have contributed to the advancement of his inventions and the successful implementation of his patents.
Conclusion
Kouji Otani's contributions to water quality detection and wastewater treatment demonstrate his commitment to environmental innovation. His patents reflect a deep understanding of the challenges in these fields and offer practical solutions for improving water safety and treatment processes.