Answer:
(i) 5-day BOD of the waste is 120 mg/l.
(ii) The ultimate carbonaceous BOD (Lo) is 20 mg/l.
Explanation:
The dilution factor D is 0.05.
The initial DO is 8.0 mg/L and the DO after 5 days is 2.0 mg/L.
The BOD of the waste for an unseeded mixture is
![BOD_5=(DO_5-DO_0)/D=(8-2)/0.05=6/0.05=120mg/l](https://tex.z-dn.net/?f=BOD_5%3D%28DO_5-DO_0%29%2FD%3D%288-2%29%2F0.05%3D6%2F0.05%3D120mg%2Fl)
The ultimate carbonaceous BOD (Lo) can be calculated as
![L = L_o*10 ^{- k_1t} \\L_o=L/10^{- k_1t}=2/10^{- 0.2*5}=2/10^{- 1}=2*10=20mg/l](https://tex.z-dn.net/?f=L%20%3D%20L_o%2A10%20%5E%7B-%20k_1t%7D%20%5C%5CL_o%3DL%2F10%5E%7B-%20k_1t%7D%3D2%2F10%5E%7B-%200.2%2A5%7D%3D2%2F10%5E%7B-%201%7D%3D2%2A10%3D20mg%2Fl)
I think it is the gas and the heat in it
Answer:
true
Explanation:
Hotter things have more heat energy than colder things. That's because the atoms or molecules move around faster in hot things (red, right) than they do in cold things (blue, left). ... The more heat you supply, the faster the molecules move and the further apart they get.
Radioactive zone.
Hope this helps! Have a nice day :)
Scientist and Chemical Engineers