TLS Online TPP Program

#Question id: 27342


A culture of Rhizobium sp. is grown in a chemostat (200 m³ bioreactor). The feed contains 12 g/L sucrose, Ks for the organism is 0.2 g/L and Hmax = 0.3 h¹. The flow rate required to obtain steady state concentration of sucrose as 2 g/L in the bioreactor

#Section 5: Bioprocess Engineering and Process Biotechnology
  1. 44 m³ h¹

  2. 54 m³ h¹

  3. 26 m³ h¹

  4. 36 m³ h¹

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TLS Online TPP Program

#Question id: 14167

#Section 5: Bioprocess Engineering and Process Biotechnology

Corn-steep liquor contains 2.5 % invert sugars and 50% water; the rest can be considered solids. Beet molasses containing 50% sucrose, 1% invert sugars, 18% water and the remainder solids, is mixed with corn-steep liquor in a mixing tank. Water is added to produce a diluted sugar mixture containing 2% (w/w) invert sugars. 125 kg corn-steep liquor and 45 kg molasses are fed into the tank.

 How much water is required?


TLS Online TPP Program

#Question id: 14168

#Section 4: Fundamentals of Biological Engineering

Corn-steep liquor contains 2.5 % invert sugars and 50% water; the rest can be considered solids. Beet molasses containing 50% sucrose, 1% invert sugars, 18% water and the remainder solids, is mixed with corn-steep liquor in a mixing tank. Water is added to produce a diluted sugar mixture containing 2% (w/w) invert sugars. 125 kg corn-steep liquor and 45 kg molasses are fed into the tank.

What is the concentration of solids in the final mixture?

TLS Online TPP Program

#Question id: 14168

#Section 5: Bioprocess Engineering and Process Biotechnology

Corn-steep liquor contains 2.5 % invert sugars and 50% water; the rest can be considered solids. Beet molasses containing 50% sucrose, 1% invert sugars, 18% water and the remainder solids, is mixed with corn-steep liquor in a mixing tank. Water is added to produce a diluted sugar mixture containing 2% (w/w) invert sugars. 125 kg corn-steep liquor and 45 kg molasses are fed into the tank.

What is the concentration of solids in the final mixture?

TLS Online TPP Program

#Question id: 14169

#Section 4: Fundamentals of Biological Engineering

Unsweetened condensed milk is a shelf-stable canned milk product. If 100kg of fresh milk, containing 87% water and the rest milk solids, is condensed using an evaporator to remove 60% of the water from the fresh milk, calculate:

 The mass of water evaporated


TLS Online TPP Program

#Question id: 14169

#Section 5: Bioprocess Engineering and Process Biotechnology

Unsweetened condensed milk is a shelf-stable canned milk product. If 100kg of fresh milk, containing 87% water and the rest milk solids, is condensed using an evaporator to remove 60% of the water from the fresh milk, calculate:

 The mass of water evaporated


TLS Online TPP Program

#Question id: 14170

#Section 4: Fundamentals of Biological Engineering

Unsweetened condensed milk is a shelf-stable canned milk product. If 100kg of fresh milk, containing 87% water and the rest milk solids, is condensed using an evaporator to remove 60% of the water from the fresh milk, calculate:

The final mass and composition of condensed milk produced