Discussion
Effluent from a fruit and vegetable processing plant is characterised chiefly by
Answer: C
Correct answer: A high biochemical oxygen demand
Fruit and vegetable effluent carries sugars, starches, pulp and washings - all readily biodegradable - so its BOD is high, often several thousand mg/l. That makes biological treatment the natural choice, and it also makes the effluent a candidate for anaerobic digestion, since the organic load is an energy source.
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