THIS MONTH'S PUZZLER

摘要

I run a mill(figure online at https://bit.Iy/3mp1x2w)that processes different types of oil seeds,e.g.,soybeans,into oils that our clients then sell.After five years of operation,we want to expand capacity and improve quality.This also will provide an opportunity to deal with some lingering problems in the process;the grinding part of the plant and the cleaning system is designed well but the owners seemingly ran out of money when it came to the solvent extraction set-up.The word has gotten out that we are looking for improvements to consider-and everyone has an idea.I need help sorting through these suggestions.One of the owners says we should consider an enzyme addition to the hexane we use;during construction,he had pushed for going with an exotic solvent instead of tried-and-true hexane;at his behest,the salesperson continues to badger me.