www.che.com NOVEMBER 2013 VOLUME 120, NO. 11 COVER STORY 28 Cover Story Troubleshooting and Solving a Sour-Water Stripper Problem A careful, systematic approach helps identify problems that prevented a stripper column from achieving its design goal NEWS 9 28 Chementator KIT makes " gasoline " from biomass for the first time; Plasma-modified CNTs show promise for water purification; Capture realtime images of gas leaks with this technology; First commercial-scale, high-solids anaerobic digester in North America; Photobioreactor demonstration planned; and more 15 20 Newsfront 42nd Kirkpatrick Award Announced Six companies are honored for innovation in chemical engineering Newsfront The New Face of Heat Exchangers Evolving heat-exchanger technology allows different types and designs to find use in the CPI ENGINEERING 25 Facts at Your Fingertips Calculating Volumes of Bulk Solids This one-page reference offers equations for calculating volumes for piles of bulk solids when poured into silos in several situations 26 Technology Profile Ethanol from Cellulose This one-page profile describes the technology and economic considerations for the production of ethanol from woody biomass 36 Feature Report Piping Design for Potentially Lethal Chemicals Integrity and reliability are critical for piping and equipment that handle chemicals with extreme health hazards In this Issue! Starts on Page 55 20 CHEMICAL ENGINEERING WWW.CHE.COM NOVEMBER 2013 1 15http://www.che.com http://WWW.CHE.COM