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Biological neutralization of alkalis is usually done during the ___________

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Biological neutralization of alkalis is usually done during the ___________

(a) Floatation and fat separation

(b) Mixing

(c) BOD degradation

(d) Pasteurization

I had been asked this question during an interview for a job.

My query is from Wastewater Treatment of Food Processing Industries topic in portion Wastewater Treatment of Food Processing Industries of Environmental Biotechnology

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Correct choice is (c) BOD degradation

Explanation: In the BOD degradation step, the Biological neutralization of alkalis can be done using carbon dioxide, Pasteurization is followed during the initial treatment of waste water from dairy industry for decreasing the microbial load in the milk by exposing the it to higher temperatures, Floatation and fat separation is the first step which is followed by Mixing where carbon dioxide is removed.

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