Terra Preta Sanitation full reuse in sanitaton and bio-waste-management Learning from successful ancient cultures… Prof. Dr. Ralf Otterpohl.
Decentralized Sanitation for Rural Areas Univ. Prof. Dr.-Ing. Ralf Otterpohl Director Institute of Wastewater Management and Water Protection Chair, Specialist.
Dr. Haiko Pieplow BMU May 13th, 2011, BerlinVideo Conference Berlin/St. Petersburg Case Study: NEGA – Resources-Approach Minimum of Resources for Maximum.