www.che.com June 2014 Volume 121, no. 6 Cover Story 30 Cover Story Industrial Control Systems Security: The Owner-Operator's Challenge Addressing the cybersecurity of industrial control systems requires a collaborative response, beginning with a realistic assessment NewS 9 30 Chementator Recover waste heat with organic Rankine cycle (ORC) technology; A process that recovers rare-earth elements from " urban mining " ; Using algae to clean wastewater . . . and to make beta-1,3-glucan; This PEM fuel cell has hydrogen storage built in; Imitating nature leads to a better catalyst; and more 13 Newsfront Grappling With Graphene: The Race to Commercialization Touted as a wonder material, graphene is a key focus of scientists and engineers around the world 18 Newsfront Size-Reduction Re-Do Improvements to grinding, milling and screening equipment help processors increase efficiency and reduce costs eNgiNeeriNg 28 Facts at Your Fingertips Construction Cost Indices This one-page reference provides information on construction cost indices that are designed for CPI facilities, and shows the historical trends of the Chemical Engineering Plant Cost Index 29 Technology Profile Bio-Based Adipic Acid This one-page profile describes a fermentation process for converting sucrose to the dicarboxylic acid compound adipic acid 36 Feature Report Combining Rupture Discs with Pressure-Relief Valves Using the two devices together offers significant benefits in chemical processes. Here's how to take advantage of them 42 Engineering Practice Fine Tune the Design of Sour-Water Strippers Using Rate-Based Simulation A look at the benefits of using simulations in the design of SWS units, and some practical tips on SWS operation 13 36 18 ChemiCal engineering www.Che.Com June 2014 1http://www.che.com http://www.Che.Com