An activated-sludge waste treatment system is required to reduce the amount of BOD₅ from 1000 mg/l to 20 mg/l at the exit. The sedimentation unit concentrates biomass by a factor of 3. Kinetic parameters are µ_m = 0.2 h-1 , K_s = 80 mg/l, k_d = 0.01 h-1 , and Y ^M _X/S = 0.5 g MLVSS/g BOD₅. The flow of waste water is 10000 l/h and the size of the treatme nt basin is 50,000 l. What value of the recycle ratio must be used?

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TLS Online TPP Program

#Question id: 223

#Section 2: General Biology

Which coenzyme links to a lysine residue in a proteinʹs active site?

A) biotin

B) lipoic acid (lipoamide)

C) pyridoxal phosphate

D) biotin and pyridoxal phosphate only

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#Question id: 224

#Section 2: General Biology

Which type of atom is involved in the reactive center of lipoamide?

TLS Online TPP Program

#Question id: 225

#Section 2: General Biology

What kind of reaction is most important for the reactive center of lipoamide?

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#Question id: 226

#Section 2: General Biology

Which in not a lipid-soluble vitamin?

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#Question id: 230

#Section 2: General Biology

Vitamin D helps control the utilization of which ion?

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#Question id: 231

#Section 2: General Biology

Another name for α-tocopherol is vitamin ________.