The table below compares the effectiveness of each type of technology according to each environmental parameter.
Parameters
Organic matter (OM)
TKN
Total N
Total P
Microbial removal
Horizontal flow CW
Yes
Poor nitrification
Good denitrification
No
Vertical flow CW
No*
Free water surface CW
Average
Yes, the first years
yes
Table 3: The effectiveness of each technology based on each parameter (European Commission, 2001)
* In intermittent fed system a simultaneous N elimination takes place (see case study Lambertsmühle chapter 6.2).
Removal Mechanisms
Removal Mechanisms