Table 4.
TU values in the raw landfill leachate (series 2018–2020) and series June 2020 before and after the biological treatment with Phragmites australis and Ceratophyllum demersum L.
| Research Object | Raw Leachate | Series June 2020 after Biological Treatment | |||
|---|---|---|---|---|---|
| Min. Values (2018–2019) |
Max. Values (2018–2019) |
June 2020 Series | Ceratophyllum demersum | Phragmites australis | |
| Bielawa | 1.58 | 3.71 | 0.64 | 0.92 | 0.51 |
| Legnica | 3.19 | 31.25 | 3.37 | 2.31 | 2.73 |
negligible acute toxicity: 0.4 < TU < 1, 
acute toxicity: 1.0 < TU < 10, 
high acute toxicity: 10 < TU < 100 [41].