Question $8(10$ marks$)$

Compute the flow$-$weighted BOD and TSS values using the data provided below for a community of about $5000$ persorns. Compare the flow$-$weighted values to the simple arithmetic averages. What is the significance of the difference?

$\backslash$begin$\{$tabular$\}\{|$l$|$l$|$l$|$l$|$l$|$l$|$l$|$l$|\}$

$\backslash$hline Time & $\backslash$begin$\{$tabular$\}\{$l$\}$

Flowrate $\backslash \backslash$

$\backslash (\backslash$left$(\backslash$mathrm$\{$m$\}^\{3\}/\backslash$mathrm$\{$s$\}\backslash$right$)\backslash )$

$\backslash$end$\{$tabular$\}$ & $\backslash$begin$\{$tabular$\}\{$l$\}$

BOD $\backslash \backslash$

$\backslash (\backslash$left$(\backslash$mathrm$\{$g$\}/\backslash$mathrm$\{$m$\}^\{3\}\backslash$right$)\backslash )$

$\backslash$end$\{$tabular$\}$ & $\backslash$begin$\{$tabular$\}\{$l$\}$

TSS $\backslash \backslash$

$\backslash (\backslash$left$(\backslash$mathrm$\{$g$\}/\backslash$mathrm$\{$m$\}^\{3\}\backslash$right$)\backslash )$

$\backslash$end$\{$tabular$\}$ & Time & $\backslash$begin$\{$tabular$\}\{$l$\}$

Flowrate $\backslash \backslash$

$\backslash (\backslash$left$(\backslash$mathrm$\{$m$\}^\{3\}/\backslash$mathrm$\{$s$\}\backslash$right$)\backslash )$

$\backslash$end$\{$tabular$\}$ & $\backslash$begin$\{$tabular$\}\{$l$\}$

BOD $\backslash \backslash$

$\backslash (\backslash$left$(\backslash$mathrm$\{$g$\}/\backslash$mathrm$\{$m$\}^\{3\}\backslash$right$)\backslash )$

$\backslash$end$\{$tabular$\}$ & $\backslash$begin$\{$tabular$\}\{$l$\}$

TSS $\backslash \backslash$

$\backslash (\backslash$left$(\backslash$mathrm$\{$g$\}/\backslash$mathrm$\{$m$\}^\{3\}\backslash$right$)\backslash )$

$\backslash$end$\{$tabular$\}\backslash \backslash$

$\backslash$hline Mid & $0\mathrm{.}120$ & $165$ & $175$ & Noon & $0\mathrm{.}195$ & $255$ & $280\backslash \backslash$

$\backslash$hline $1$ a$.$m & $0\mathrm{.}115$ & $150$ & $155$ & $1$ p$.$m & $0\mathrm{.}180$ & $242$ & $265\backslash \backslash$

$\backslash$hline $2$ & $0\mathrm{.}095$ & $130$ & $135$ & $2$ & $0\mathrm{.}170$ & $229$ & $265\backslash \backslash$

$\backslash$hline $3$ & $0\mathrm{.}075$ & $110$ & $120$ & $3$ & $0\mathrm{.}164$ & $230$ & $235\backslash \backslash$

$\backslash$hline $4$ & $0\mathrm{.}060$ & $100$ & $110$ & $4$ & $0\mathrm{.}160$ & $212$ & $222\backslash \backslash$

$\backslash$hline $5$ & $0\mathrm{.}055$ & $90$ & $100$ & $5$ & $0\mathrm{.}158$ & $217$ & $210\backslash \backslash$

$\backslash$hline $6$ & $0\mathrm{.}060$ & $100$ & $90$ & $6$ & $0\mathrm{.}159$ & $234$ & $200\backslash \backslash$

$\backslash$hline $7$ & $0\mathrm{.}085$ & $120$ & $110$ & $7$ & $0\mathrm{.}163$ & $250$ & $200\backslash \backslash$

$\backslash$hline $8$ & $0\mathrm{.}115$ & $150$ & $150$ & $8$ & $0\mathrm{.}169$ & $270$ & $212\backslash \backslash$

$\backslash$hline $9$ & $0\mathrm{.}160$ & $190$ & $210$ & $9$ & $1\mathrm{.}174$ & $295$ & $216\backslash \backslash$

$\backslash$hline $10$ & $0\mathrm{.}187$ & $238$ & $253$ & $10$ & $0\mathrm{.}164$ & $250$ & $203\backslash \backslash$

$\backslash$hline $11$ & $0\mathrm{.}195$ & $256$ & $273$ & $11$ & $0\mathrm{.}155$ & $199$ & $189\backslash \backslash$

$\backslash$hline $12$ & $0\mathrm{.}195$ & $255$ & $280$ & $12$ & $0\mathrm{.}135$ & $165$ & $175\backslash \backslash$

$\backslash$hline

$\backslash$end$\{$tabular$\}$ Question $8(10$ marks$)$

Compute the flow$-$weighted BOD and TSS values using the data provided below for a community of about $5000$ persorns. Compare the flow$-$weighted values to the simple arithmetic averages. What is the significance of the difference?

$\backslash$begin$\{$tabular$\}\{|$l$|$l$|$l$|$l$|$l$|$l$|$l$|$l$|\}$

$\backslash$hline Time & $\backslash$begin$\{$tabular$\}\{$l$\}$

Flowrate $\backslash \backslash$

$\backslash (\backslash$left$(\backslash$mathrm$\{$m$\}^\{3\}/\backslash$mathrm$\{$s$\}\backslash$right$)\backslash )$

$\backslash$end$\{$tabular$\}$ & $\backslash$begin$\{$tabular$\}\{$l$\}$

BOD $\backslash \backslash$

$\backslash (\backslash$left$(\backslash$mathrm$\{$g$\}/\backslash$mathrm$\{$m$\}^\{3\}\backslash$right$)\backslash )$

$\backslash$end$\{$tabular$\}$ & $\backslash$begin$\{$tabular$\}\{$l$\}$

TSS $\backslash \backslash$

$\backslash (\backslash$left$(\backslash$mathrm$\{$g$\}/\backslash$mathrm$\{$m$\}^\{3\}\backslash$right$)\backslash )$

$\backslash$end$\{$tabular$\}$ & Time & $\backslash$begin$\{$tabular$\}\{$l$\}$

Flowrate $\backslash \backslash$

$\backslash (\backslash$left$(\backslash$mathrm$\{$m$\}^\{3\}/\backslash$mathrm$\{$s$\}\backslash$right$)\backslash )$

$\backslash$end$\{$tabular$\}$ & $\backslash$begin$\{$tabular$\}\{$l$\}$

BOD $\backslash \backslash$

$\backslash (\backslash$left$(\backslash$mathrm$\{$g$\}/\backslash$mathrm$\{$m$\}^\{3\}\backslash$right$)\backslash )$

$\backslash$end$\{$tabular$\}$ & $\backslash$begin$\{$tabular$\}\{$l$\}$

TSS $\backslash \backslash$

$\backslash (\backslash$left$(\backslash$mathrm$\{$g$\}/\backslash$mathrm$\{$m$\}^\{3\}\backslash$right$)\backslash )$

$\backslash$end$\{$tabular$\}\backslash \backslash$

$\backslash$hline Mid & $0\mathrm{.}120$ & $165$ & $175$ & Noon & $0\mathrm{.}195$ & $255$ & $280\backslash \backslash$

$\backslash$hline $1$ a$.$m & $0\mathrm{.}115$ & $150$ & $155$ & $1$ p$.$m & $0\mathrm{.}180$ & $242$ & $265\backslash \backslash$

$\backslash$hline $2$ & $0\mathrm{.}095$ & $130$ & $135$ & $2$ & $0\mathrm{.}170$ & $229$ & $265\backslash \backslash$

$\backslash$hline $3$ & $0\mathrm{.}075$ & $110$ & $120$ & $3$ & $0\mathrm{.}164$ & $230$ & $235\backslash \backslash$

$\backslash$hline $4$ & $0\mathrm{.}060$ & $100$ & $110$ & $4$ & $0\mathrm{.}160$ & $212$ & $222\backslash \backslash$

$\backslash$hline $5$ & $0\mathrm{.}055$ & $90$ & $100$ & $5$ & $0\mathrm{.}158$ & $217$ & $210\backslash \backslash$

$\backslash$hline $6$ & $0\mathrm{.}060$ & $100$ & $90$ & $6$ & $0\mathrm{.}159$ & $234$ & $200\backslash \backslash$

$\backslash$hline $7$ & $0\mathrm{.}085$ & $120$ & $110$ & $7$ & $0\mathrm{.}163$ & $250$ & $200\backslash \backslash$

$\backslash$hline $8$ & $0\mathrm{.}115$ & $150$ & $150$ & $8$ & $0\mathrm{.}169$ & $270$ & $212\backslash \backslash$

$\backslash$hline $9$ & $0\mathrm{.}160$ & $190$ & $210$ & $9$ & $1\mathrm{.}174$ & $295$ & $216\backslash \backslash$

$\backslash$hline $10$ & $0\mathrm{.}187$ & $238$ & $253$ & $10$ & $0\mathrm{.}164$ & $250$ & $203\backslash \backslash$

$\backslash$hline $11$ & $0\mathrm{.}195$ & $256$ & $273$ & $11$ & $0\mathrm{.}155$ & $199$ & $189\backslash \backslash$

$\backslash$hline