| Wastewater characteristics |
Biodegradability parameter |
Work highlights |
Reference |
| Municipal WWTP effluent |
BOD5 |
Biodegradability increase due to the change in molecular structure of refractory compounds decreased inhibitory effects |
[68] |
| Textile dye |
BOD5 increase, BOD/COD,
OD/TOC |
Under optimal conditions, the BOD/TOC and BOD/COD ratios increased up to 0.58 and 0.27, respectively. |
[69] |
| Phenolic solution |
BOD5/COD |
The BOD5/COD ratio increased to 0.18, 0.26 for the test solutions, under the best treatment time. |
[70] |
| Pulp mill alkaline bleach plant effluent |
BOD5 increase
COD reduction |
Ozone treatment enhanced the biodegradability of the effluent, monitored as 21% COD reduction and 13% BOD5 enhancement |
[71] |
| Procaine penicillin G formulation effluent |
BOD5 |
No significant correlation existed between the BOD5 and the toxicity test results |
[72] |
| Diclofenac in aqueous solution |
BOD5/COD
Zahn-Wellens test |
Ozonation promotes a more biocompatible effluent of waters containing diclofenac |
[73] |
| Textile wastewater |
BOD5/COD |
Biodegradability enhancement by a factor up to 6,8-fold |
[74] |
