Ralf W. Otterpohl

Ralf Otterpohl (Univ.-Prof.em. Dr.-Ing.) is Civil Engineer in Water and Wastewater Management. In 1994 he founded Otterwasser GmbH, pioneering in mathematical modelling of wastewater plants and distributing a co-developed software. He is an internationally renowned pioneer in resource recovering sanitation systems. In 1998, Ralf Otterpohl became full professor and the director of the Institute of Wastewater Management and Water Protection at TUHH, Hamburg University of Technology. Terra Preta Sanitation with full fertilizer recovery was developed. His research also covers Rural Development, Regenerative Agriculture, Rainwater Harvesting and the concept of Garden Communities. Since 2024 he works as a freelance consultant in rural development, is an author and a researching geomancy teacher.