A
A specialized chemical catalyst used to accelerate anaerobic digestion in biogas plants.
B
A high-pressure liquid fuel derived from urban solid waste for transport sectors.
C
Industrial wastewater treated to extract purified methane for city gas distribution.
D
A nutrient-rich byproduct of anaerobic digestion used as an organic soil conditioner.
Correct answer: (d) A nutrient-rich byproduct of anaerobic digestion used as an organic soil conditioner.
Explanation
Option D is correct as bio-slurry is defined as the nutrient-rich byproduct of anaerobic digestion which is utilized as an organic soil conditioner. Options A, C, and D are incorrect definitions that mischaracterize bio-slurry as a chemical catalyst, high-pressure liquid fuel, or treated industrial wastewater.
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