The BOD5 value of a waste-water feed stream to an activated-sludge unit is S0 = 300 mg/l, and the effluent is desired to be S = 30 mg/l. The feed flow rate is F = 2× 10^7 l/day. For the recycle ratio of α = 0.5 and a steady-state biomass concentration of X = 5 g/l, Use the following kinetic parameters:

 

calculate Biomass concentration in recycle (Xr).

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#Question id: 1587

#SCPH28 | Zoology

In the human disease known as lupus, there is an immune reaction against a patientʹs own DNA from broken or dying cells. This kind of response typifies which kind of irregularity?

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#Question id: 5546

#SCPH06 I Botany

By the end of _______________ , distribution of cells into the three primary tissue types has been completed

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#Question id: 14208

#SCPH05 I Biotechnology

Unit of specific oxygen uptake rate? 

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#Question id: 3054

#SCPH06 I Botany

A pure culture in exponential growth phase has a bacterial concentration of 6.4 x 10^8 cells/ml. If the bacterium has a generation time of 1 h, how long ago was the cell concentration 8.0 x 10^7 cells/ml?

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#Question id: 10386

#I Life Science/ Life Sciences Group – I-V

 During light-regulated plant development many seeds require light to germinate, a process called