Many buildings on campus are equipped to process recycled water with the use of "dual plumbing" using “purple pipe”; dual plumbed buildings include the Science and Engineering Quad, School of Medicine, and the Knight Management Center complex. The systems have remained intact and active even though the main source of recycled water was eliminated with the implementation of the Stanford Energy System Innovations (SESI) project. Since SESI came online in April 2015 the recycled water system has been fed by domestic water. Formerly, cooling tower blowdown from Stanford’s cogeneration facility was collected as industrial process waste water and treated for use in toilets and urinals. The SESI project, with its transition to a heat recovery system, has greatly reduced the need for evaporative cooling, and hence industrial process wastewater is not produced. As new sources of recycled water emerge, these buildings will be among the first to implement its use.
Codiga Resource Recovery Center
Stanford Water Resources and Civil Infrastructure group has partnered with the department of Civil and Environmental Engineering (CEE) in the construction and operation of the Codiga Resource Recovery Center, which will enable CEE to expand its research of wastewater treatment processes. The facility is slated to open in the fall of 2016. Stanford will utilize findings to inform a policy regarding recycled water future potential use on campus.