Verified Certificate

Supported by the following organizations

This is to certify that Daniel Andres Negrin Sanchez successfully completed and received a passing grade in 40050455x: Water and Wastewater Treatment Engineering: Physicochemical Technology | 水处理工程：物理化学方法 a course of study offered by TsinghuaX, an online learning initiative of Tsinghua University.

Noted by

Xia Huang

Xia Huang

Professor, School of Environment Tsinghua University

About edX

edX offers interactive online classes and MOOCs from the world’s best universities, including MIT, Harvard, Berkeley, University of Texas, and many others. edX is a mission driven initiative created by founding partners Harvard and MIT.

About edX Verified Certificates

An edX Verified Certificate signifies that the learner has agreed to abide by the edX honor code and completed all of the required tasks of this course under its guidelines, as well as having their photo ID checked to verify their identity.