40 Waste water treatment services; Water treatment services; Technology and engineering services in the field of waste water treatment technology; services of technicians in the fields of mechanical engineering, machine tool manufacturing and plant engineering in the fields of water and waste water technology, namely, planning, construction and technical project planning as well as technical consulting; research and development services in the field of waste water treatment technology; consulting services in the field of waste water treatment technology; assembly, installation, maintenance, repair and rental of waste water treatment systems; water treatment, namely, the treatment of water and waste water via chemical and biological processes; water treatment, namely, the clarification and cleaning of water and waste water; Consulting services in the field of water treatment; Consulting services in the field of waste water treatment; Environmental remediation services, namely, treatment of water and waste water; Sustainable on-site water recycling and wastewater treatment services