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Table 2

Water quality data

Raw feed
UASB effluent
MBR product
Target quality
Average ± SDMinimum–maximumAverage ± SDMinimum–maximumAverage ± SDMinimum–maximum
Total CODCr (mg L–11,152 ± 461 644–2,380 632 ± 313 252–1,470 155 ± 103 66–439 <150 
Soluble CODCr (mg L–1764 ± 454 384–2,056 438 ± 259 178–1,165 155 ± 103 66–439 NA 
BOD5 (mg L–1554 ± 230 265–1,035 258 ± 124 133–583 9 ± 21 <1–78 <10 
TSS (mg L–1294 ± 139 186–703 158 ± 97 55–402 <1 <5.0  
Total nitrogen (mg L–183 ± 32 37–145 76 ± 37 18–145 43 ± 33 3–110 NA 
Total phosphorus (mg L–156 ± 14 33–76 52 ± 10 38–71 36 ± 20 5–65 NA 
Sulfate as S (mg L–1164 ± 60 27–280 21 ± 17 2–55 136 ± 44 23–220 NA 
pH (–) 7.10 ± 0.23 6.68–7.69 7.27 ± 0.22 6.57–7.80 7.37 ± 0.49 5.70–7.90 6.5–8.5 
BOD/COD (%) 51 ± 23 28–98 46 ± 23 18–98 6 ± 11 2–39 NA 
Raw feed
UASB effluent
MBR product
Target quality
Average ± SDMinimum–maximumAverage ± SDMinimum–maximumAverage ± SDMinimum–maximum
Total CODCr (mg L–11,152 ± 461 644–2,380 632 ± 313 252–1,470 155 ± 103 66–439 <150 
Soluble CODCr (mg L–1764 ± 454 384–2,056 438 ± 259 178–1,165 155 ± 103 66–439 NA 
BOD5 (mg L–1554 ± 230 265–1,035 258 ± 124 133–583 9 ± 21 <1–78 <10 
TSS (mg L–1294 ± 139 186–703 158 ± 97 55–402 <1 <5.0  
Total nitrogen (mg L–183 ± 32 37–145 76 ± 37 18–145 43 ± 33 3–110 NA 
Total phosphorus (mg L–156 ± 14 33–76 52 ± 10 38–71 36 ± 20 5–65 NA 
Sulfate as S (mg L–1164 ± 60 27–280 21 ± 17 2–55 136 ± 44 23–220 NA 
pH (–) 7.10 ± 0.23 6.68–7.69 7.27 ± 0.22 6.57–7.80 7.37 ± 0.49 5.70–7.90 6.5–8.5 
BOD/COD (%) 51 ± 23 28–98 46 ± 23 18–98 6 ± 11 2–39 NA 

SD, standard deviation; NA, not available.

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