4000m/d. According to the information on the official website of the Yunnan Water Conservancy Department, we learned that the per capita water consumption of Yunnan Vocational and Technical College of Industry and Trade is 0.2m3, and the domestic sewage discharge coefficient is 0.8. Therefore, the total domestic sewage discharged by the campus every day is 25000×0.8×0.2=4000m/d.