Info

Figure 8.6 Plot of Eq. 8.16 to determine b„. 8.3.3 Determination of Y„

Time, hrs

Figure 8.6 Plot of Eq. 8.16 to determine b„. 8.3.3 Determination of Y„

Once the value bH has been estimated and a value has been assumed for f,„ it is possible to estimate YH from a rearranged form of Eq. 5.24:

H \ (1 + f,,-b„ ■(-),.) t/ (1 + b„ • (-),.)

Recall from Eq. 8.5 that Ss<) — Ss is equal to S<(, — S(. Because data have been collected from the CSTRs on the effect of SRT on X, and S(, a plot may be made of X|'/(St-,, — S<) versus the bracketed term on the right side. It will have a slope equal to Y„.

If the treatability study is conducted in CSTRs without biomass separators, then and t will be the same, requiring a rearranged form of Eq. 5.25 to be used:

Again, S( (, — S( may be used in place of Ssi, — Ss.

Once f,„ bH and YH are known, the estimation of the other parameters may proceed as described in Sections 8.2.4, 8.2.5, and 8.2.6.

Example 8.3.1

A treatability study was performed on an industrial wastewater using CSTRs with biomass recycle. The wastewater contained a complex mixture of soluble organic

Table E8.2 Data Collected During a Treatability Study with a Soluble Industrial Wastewater
0 0

Post a comment