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Erwin Schwartz is president of DDI Heat Exchangers Inc., Montreal, a manufacturer of rectangular heat exchangers. For more information from DDI, call (514) 696-7961 or visit www.ddi-heatexchangers.com.
Recent energy cost increases and the introduction of anaerobic thermophilic processes as part of wasted industrial process and municipal-sludge digestion has prompted the use of heat recovery exchangers.
