Wastewater treatment plants - Part 1: General design and construction principles
60.55 Ratification completed (DOR)
Wastewater treatment plants - Part 7: Biological fixed-film reactors
60.55 Ratification completed (DOR)
Wastewater treatment plants - Part 15: Measurement of the oxygen transfer in clean water in aeration tanks of activated sludge plants
20.60 Close of comment period
Wastewater treatment plants - Part 2: Storm water management systems
40.60 Close of voting
