Who we are

aqua & waste International GmbH was founded in 2002 and is an independent consulting and engineering company in the field of environmental protection. Our main focus is on projects for water supply, wastewater treatment, solid waste, waste air and biogas. aqua & waste International GmbH has clients from industrial and municipal wastewater treatment plants worldwide and is specialized in design, management, realization and operation of complete waste water systems including transportation and treatment of wastewater and sludge. Moreover, existing plants enlargement which are already in operation is another field of aqua & waste expertise. The head office of aqua & waste is located in Hannover, Germany. The owner and managing director, Prof. Dr.-Ing. Peter Hartwig, has over 25 years of experience in the field of environmental protection with more than 80 references for wastewater and sludge treatment projects. Prof. Dr.-Ing. Peter Hartwig is also a member of several German expert groups for environmental projects.

Field of work

»     Municipal and industrial wastewater treatment
»     Water supply and purification
»     Biogas production and Co-fermentation
»     Sludge and solid waste management
»     Exhaust air treatment


»     Studies and research (more)
»     Planning (more)
»     Supervision (more)
»     Training/Workshop (more)
»     Simulation (more)
»     Project Management (more)

Work Experiences

»     Asia: China, India, Bangladesh, Vietnam, Iran
»     Europe: Poland, Croatia, Slovenia, Belarus
»     Africa: Botswana, Nigeria, South Africa
»     Latin america: Guatemala, Bolivia, Brazil, Colombia