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Table 1

Removal (%) of COD, TKN, and TN in the aeration basin (MLSS of 1,500–2,500 mg/L) with and without bioplates (PR of 3.2% when present)

 CODTKNTN
AS 76 ± 5.5 89 ± 16 49 ± 5.8 
AS and bioplates 77 ± 5.0 99 ± 0.6 74 ± 4.5 
 CODTKNTN
AS 76 ± 5.5 89 ± 16 49 ± 5.8 
AS and bioplates 77 ± 5.0 99 ± 0.6 74 ± 4.5 

Conditions: DO = 4–6 mg/L, aeration 1 h on: 1 h off, HRT = 6 h; removals determined for influent COD of 70–90 mg/L with standard deviations shown.

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