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A new mass balance for TAN + u was obtained (Table 6) after considering the influence of calibration values on photometric analysis of acid trap samples and dried urine samples. In case of acid traps, values from TAN + u calibration were deducted from respective TAN + u values measured for different treatments. For dried urine, average value from TAN + u calibration was deducted from measured TAN + u values of all dried urine samples. Output of TAN + u in different treatments were calculated according to new values for dried urine samples and acid trap samples and, eventually, percentages of stored and lost TAN + u were calculated to obtain the corrected mass balance.

Table 6

New mass balance for TAN + u after correcting the influence of acid and drying agent

  Output (TAN + u)
    
 Input (TAN + u)StorageLoss
Total outputUnaccounted TANStoredLost
Treatmentfresh urine (g)dried urine (g)Condensate (g)Acid trap (g)(storage + loss) (g)input-output (%)(%)(%)
T1R1 63.51 34.13 0.17 7.83 42.13 33 54 13 
T1R2 49.55 8.33 0.40 19.82 28.54 42 17 41 
T2R1 36.46 14.41 0.18 12.79 27.38 24 40 36 
T2R2a 25.47 10.16 0.10 7.88 18.14 29 40 31 
T3R1 6.22 4.20 0.01 0.53 4.75 23 68 
T3R2 6.89 5.11 0.01 0.70 5.82 16 74 10 
  Output (TAN + u)
    
 Input (TAN + u)StorageLoss
Total outputUnaccounted TANStoredLost
Treatmentfresh urine (g)dried urine (g)Condensate (g)Acid trap (g)(storage + loss) (g)input-output (%)(%)(%)
T1R1 63.51 34.13 0.17 7.83 42.13 33 54 13 
T1R2 49.55 8.33 0.40 19.82 28.54 42 17 41 
T2R1 36.46 14.41 0.18 12.79 27.38 24 40 36 
T2R2a 25.47 10.16 0.10 7.88 18.14 29 40 31 
T3R1 6.22 4.20 0.01 0.53 4.75 23 68 
T3R2 6.89 5.11 0.01 0.70 5.82 16 74 10 

aT2R2 was replaced with new material after 3rd week.

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