Wastewater treatment plants - Rectangular tanks - Part 1: Settlement tanks with sludge scraper, suction type sludge remover and chain scraper; Types, main dimensions, equipments
Edition 2002-12

Wastewater treatment plants - Rectangular tanks - Part 3: Grit chambers with suction type sludge remover and sludge scraper; Types, main dimensions, equipment
Edition 2002-12

Wastewater treatment plants - Circular tanks - Settlement tanks with sludge scraper, suction type sludge remover and thickener; Types, main dimensions, equipment
Edition 2002-12

Wastewater treatment plants - Part 4: Primary settlement; German version EN 12255-4:2002
Edition 2002-04

Wastewater treatment plants - Part 6: Activated sludge process; German version EN 12255-6:2002
Edition 2002-04

Wastewater treatment plants - Outlet installations, weir and scum baffle, submerged effluent pipes in tanks - Construction principles, main dimensions, layout
Edition 2002-12

Wastewater treatment plants - Part 8: Sludge treatment and storage; German version EN 12255-8:2001
Edition 2001-10

German standard methods for the examination of water, waste water and sludge; parameters characterizing effects and substances (group H); determination of filterable matter and the residue on ignition (H 2)
Edition 1987-03

Wastewater treatment plants - Part 5: Lagooning processes; German version EN 12255-5:1999
Edition 1999-12

Wastewater treatment plants - Part 11: General data required; German version EN 12255-11:2001
Edition 2001-07