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Domestic train influent flows and constituent loadings for the intensive evaluation period of December 2010 through October 2012 are compared in Table 2 with the design values and demonstrate that the domestic train was essentially loaded to design average values through this period. The average influent flow was marginally lower than the design value, while constituent loadings exceeded the design values modestly for most parameters. Thus, this period is appropriate for assessing the capability of the plant under full design load. Table 3 summarizes domestic MBR influent (primary effluent) flows and constituent loadings for the same period, compared to the design values, further confirming that the domestic train MBR was loaded to its design values. Flows and constituent loadings were similar in 2013 and 2014, indicating again that the domestic train MBR was consistently loaded to its design values.

Table 2

Comparison of domestic train loadings with design values for December 2010 through October 2012

 Values, December 2010 through October 2012
  
ItemAverageStandard deviationNumber data pointsDesign averageRatio actual to design
Flow (m3/day) 14,600 4,580 629 15,200 0.96 
BOD5 (kg/day) 3,583 1,980 63 3,574 1.06 
COD (kg/day) 8,057 2,720 238 7,062 1.14 
TSS (kg/day) 3,973 1,832 206 3,509 1.13 
VSS (kg/day) 3,194 1,406 197 – – 
TN (kg/day) 588 178 350 609 0.92 
TP (kg/day) 133 65 238 130 1.02 
 Values, December 2010 through October 2012
  
ItemAverageStandard deviationNumber data pointsDesign averageRatio actual to design
Flow (m3/day) 14,600 4,580 629 15,200 0.96 
BOD5 (kg/day) 3,583 1,980 63 3,574 1.06 
COD (kg/day) 8,057 2,720 238 7,062 1.14 
TSS (kg/day) 3,973 1,832 206 3,509 1.13 
VSS (kg/day) 3,194 1,406 197 – – 
TN (kg/day) 588 178 350 609 0.92 
TP (kg/day) 133 65 238 130 1.02 

BOD5: biochemical oxygen demand; COD: chemical oxygen demand; TSS: total suspended solids; VSS: volatile suspended solids; TN: total nitrogen; TP: total phosphorus.

Table 3

Comparison of MBR loadings with design values for December 2010 through October 2012

ItemDesignActualRatio actual to design
Flow (m3/day) 14,300 13,500 0.94 
BOD5 (kg/d) 2,964 3,133 1.05 
COD (kg/d) 5,517 5,700 1.03 
TSS (kg/d) 1,673 1,728 1.03 
VSS (kg/d) 1,157 1,357 1.19 
TN (kg/d) 567 480 0.85 
TP (kg/d) 120 111 0.92 
ItemDesignActualRatio actual to design
Flow (m3/day) 14,300 13,500 0.94 
BOD5 (kg/d) 2,964 3,133 1.05 
COD (kg/d) 5,517 5,700 1.03 
TSS (kg/d) 1,673 1,728 1.03 
VSS (kg/d) 1,157 1,357 1.19 
TN (kg/d) 567 480 0.85 
TP (kg/d) 120 111 0.92 

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