#Newest version of mainstage 3.3 software

Denitrification Capacity Due to the change of the calculation basis from BOD to COD, the form for the denitrification capacity is different. That can lead to a higher Process Factor for larger plants while for the old model the Safety Factor was smaller for bigger plants.

It is no longer selected depending on the People Equivalents but based on the Peek Factor f N and the Nutrient Outflow Requirements. The selection of the Process Factor differs from the former Safety Factor selection. The Safety Factor for nitrification is replaced by the Process Factor. May 2000 June 2016 Raw Wastewater 0.5 to 1.0 h h h h > 2.5 h BOD COD CCOD 84 79,2 72 XCOD 45% 55% 60% DS XTS ,5 TKN CKN 9,9 9,9 9,9 P 1,8 1,6 1,6 CP 1,62 1,62 1,62 Table 1 A131/2000 and Table 2 A131/2017 Inhabitant-specific loads in g/(lxd), which are undercut on 85% of the days, without taking into account sludge liquorДў Defining the Load Aerobic Sludge Age The form for the aerobic sludge age is still the same. Only the degradation of compounds in the primary sedimentation increased a little bit. Loads/Inflow The general recommendations for the specific loads are still the same.

#Newest version of mainstage 3.3 software

The design software AQUA DESIGNER had to be totally rearranged and we used this requirements to improve the interfaces and to deliver more possibilities and information. So, all algorithms are completely different to the former valid document ATV-DVWK-A 131. Fundamental Changes The basic design was changed from BOD to COD. AQUA DESIGNER was adapted to the new conditions as one of the first applications and all parts of the huge amount of tools are now complying with the requirements of the directive. Currently, the design software has to fulfil the conditions of this worksheet if the result uses to be according to german or european conditions. 1 New Version of DWA-worksheet for the design of wastewater treatment plants with activated sludge systems according to DWA-A 131 Norbert Meyer, BITControl GmbH In June 2016, a new directive for the design of wastewater treatment plants with activated sludge systems was published.