In 1989, which individual filed a patent for a submerged MBR system, contributing to the refinement of the technology?
Answer
W. Grießhaber
W. Grießhaber filed a significant patent for a submerged MBR system in 1989. This filing occurred during the period when the technology was moving from early laboratory experiments toward more widespread system refinement. Such patents played a critical role in solidifying the submerged design, which eventually became the dominant type of MBR system in modern water treatment engineering.
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