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 Required reactor volume (V). 

_______________10^6

#Question id: 10506

#Section 6: Plant, Animal and Microbial Biotechnology

Plant growth promoting rhizobacteria (PGPRs) such as Pseudomonas aeruginosa, that alleviate plant abiotic or biotic stress in soil by releasing of

#Question id: 10507

#Section 6: Plant, Animal and Microbial Biotechnology

Rhizobacteria function as

 a) Nitrogen fixation

 b) depositing pathogens directly into the vascular system,

 c) producing antibiotics and antifungal agents for inhibiting soil pathogens

 d) herbivore sensors by sending electrical or chemical signals to surrounding cells

 Which one of the following combination is correct?

#Question id: 10508

#Section 6: Plant, Animal and Microbial Biotechnology

Glandular trichomes store species-specific secondary metabolites in a pocket formed between the cell wall and the cuticle. These secondary metabolites are-

#Question id: 10509

#Section 6: Plant, Animal and Microbial Biotechnology

A different type of mechanical obstacle to herbivory is provided by mineral crystals that are present in many plant species, such as silica crystals known as

#Question id: 10510

#Section 6: Plant, Animal and Microbial Biotechnology

Constitutive chemical defenses are effective against many different herbivores, including insects and mammals. Hemlock (Cicuta sp.) produces which toxins that a polyacetylene prolongs the repolarization of neuronal action potentials.

#Question id: 10511

#Section 6: Plant, Animal and Microbial Biotechnology

Which type of pumps inhibits digitoxin in the membranes of heart cells, leading to increased myocardial contraction?