In the first month of the MP’s operation, the COD and BOD5 values were low, at 31.1 mg O2/dm3 and 3.4 mg O2/dm3, respectively. The similar trends were then observed for the COD and BOD5 values, and the results indicated a gradual increase for up to 5–6 months of operation, with values reaching 12,620 mg O2/dm3 and 8,185 mg O2/dm3, respectively, followed by stabilization after
33–34 months of operation, with stationary concentrations reaching approximately 1600 mg O2/dm3 and 400 mg O2/dm3, respectively(Fig. 2).
In the first month of the MP’s operation, the COD and BOD5 values were low, at 31.1 mg O2/dm3 and 3.4 mg O2/dm3, respectively. The similar trends were then observed for the COD and BOD5 values, and the results indicated a gradual increase for up to 5–6 months of operation, with values reaching 12,620 mg O2/dm3 and 8,185 mg O2/dm3, respectively, followed by stabilization after33–34 months of operation, with stationary concentrations reaching approximately 1600 mg O2/dm3 and 400 mg O2/dm3, respectively(Fig. 2).
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