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 treatment basin is 50,000 l. What is the value of the solids residence time?

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#Question id: 437

#SCPH05 I Biotechnology

Which thermodynamic quantity is used to determine if a reaction in a cell is spontaneous?

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#Question id: 4137

#SCPH05 I Biotechnology

Formation of the ribosomal initiation complex for bacterial protein synthesis does not require:

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#Question id: 19356

#SCPH01 Biochemistry

Genes were transferred from eukaryotes, more particularly from human beings, into prokaryotes like E. coli this phase is considered as

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#Question id: 19758

#SCPH05 I Biotechnology

Which of the following pair of species is isoelectronic and same structure ?

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#Question id: 19849

#SCPH05 I Biotechnology

Warming ammonium chloride with sodium hydroxide in a test tube is an example of :