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    • Song, Y.; Yao, Y.; Ma, Z.; Na, W. (Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu), 2006)
      A heat pump using disposed sewage as a heat source to heat raw sewage is presented to solve the problem that sewage temperature is low in sewage biologic treatment in cold region. According to the status of one medicine ...