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. 2021 Sep 24;7(9):e08065. doi: 10.1016/j.heliyon.2021.e08065

Table 2.

ADPE conditions, measurements, and methods.

Analyte Value Method and Equipment
pH 7.02 Electrode-pH meter. Standard Methods 4500-H + B or EPA Method 150.1.
COD (mg/L) 1366.66 Potassium dichromate/sulfuric acid digestion-colorimetric analysis. EPA approved method. EPA Method 410.4.
TS (mg/L) 2048 Gravimetric method. Standard Methods 2540B.
VS (mg/L) 880 Ignition-Gravimetric method. Standard Methods 2540E.
TKN (mg/L) 237 K2SO4–CuSO4 digestion, ammonia-salicylate-nitroprusside-hypochlorite colorimetry on a Autoanalyzer System. Standard Methods 4500Norg B or EPA Method 351.2.
NH4–N (mg/L) 144 Ammonia-salicylate-nitroprusside-hypochlorite colorimetry on a Autoanalyzer System. Standard Methods 4500-NH3 G.
TP (mg/L) 94.5 K2SO4–CuSO4 digestion. Ortho phosphate-molybdate-antimony-ascorbic acid colorimetry on a Autoanalyzer System. Standard Method 4500-P F.

Abbreviations used: COD, chemical oxygen demand; TS, total solids; VS, volatile solids; TKN, total Kjeldahl nitrogen; NH4–N, ammonia nitrogen; TP, total phosphorus.