Question

12. Throughout any given day, a bakery generates 12 m'/h of a waste containing 0.7 g/L of total suspended solids (TSS). The waste flows continuously through a 6000 gallon holding tank and then without treatment into the city sewer system. The plant manager intends to add a new pan washing process which will operate between midnight and 3:00 a.m. each day. When operating, the pan washer alone generates an additional 3 m/h of a waste containing 4.6 g/L TSS. Based on the inclusion of this new pan washing process, i. What is the total volume of waste generated each day? What is the total mass of solids generated each day? in the waste? midnight and 3:00 a.m. ii. ii. Based on the calculations in parts i. and ii., what is the average daily TSS concentration iv. Write a differential equation describing the TSS concentration in the effluent between v. At what time does the maximum TSS concentration in the effluent occur and what is that TSS concentration? vi. What is the TSS concentration in the effluent at 8:00 a.m.? vii. If the pan washer were to operate 24 h each day (i.e, with the same hourly flowrate and TSS concentration), what would be the steady-state TSS concentration in the effluent? vii. Based on the calculations for the pan washer operating between midnight and 3:00 a.m., sketch the TSS concentration in the effluent between midnight and noon.

Answer 1

To delermine Various pav ts CslculationTo tal volume oh uonsk generotd coch los ooste generated by bakery wask generokd by uoos her 3m/h toal uwoste generoted ina da (a+3) xa 360 m 360000 Jiturs Ans 6

) Total mass ob solids gencrarled each de Solids in waste generated bu bakery, 0.7 g/L Bakery generat駕伫(AmsXay 388 m ld od 2.88000 ers d s, Solids (uc to bakr (88o00 X 0-) g8ooo o1600 - ao16 k a Rer in one dou Siilory Solids (due to eosher)x)md X 6/ 331200 d - 331-a ald so, total solid uosit in6 31-2)k ' one das Ans [11 Average daiy Ts cowentration in the toaste (berd calculation done in 6) and (i)). t Average daily Tss contentration Total solid wask) Totel volome asky

Average doilyS532 8 X lo 36 0000 1.48 g/1. Avns Co) s (11