Info

Note: *MLSS volume after 30 min settling.

Note: *MLSS volume after 30 min settling.

FIG. 7.25.7 Relationship between SVI, recycling ratio, and MLSS concentration.

effect on the process results than does the liquid retention time. The basic design parameters are the organic strength (BOD5) of the wastewater and the MLSS concentration. Of these two parameters, only the MLSS can be varied by operation. Environmental engineers base their designs on the organic loading or F/M ratio, incorporating both the BOD5 and MLSS concentration.

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