With very infrequent membrane substitution, very low energy utilization, and moderate chemical use, the operational expenses of membrane methods are lower, and the overall expense of ownership and minimal upkeep profile is rather favorable in comparison to other techniques. M.I.T. theses are shielded by copyright. They may be viewed from http://shanefatr632.theglensecret.com/11-ways-to-completely-ruin-your-silicon-carbide-diode