The World Water Con­gress & Exhi­bi­tion, host­ed by the Inter­na­tion­al Water Asso­ci­a­tion (IWA), address­es an issue of prime impor­tance – the solu­tion of glob­al water prob­lems. As recog­nised expert in the field of mod­ern waste­water man­age­ment, Jörg Stein­hardt received an invi­ta­tion from the Tokyo Met­ro­pol­i­tan Gov­ern­ment and the Tokyo Met­ro­pol­i­tan Sew­er­age Bureau