Verified Certificate

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This is to certify that Ellis winston oppong successfully completed and received a passing grade in 40050455.2x: Water and Wastewater Treatment Engineering: Biochemical Technology | 水处理工程：生物化学方法 a course of study offered by TsinghuaX, an online learning initiative of Tsinghua University.

Noted by

Jian'e Zuo

Jian'e Zuo

Professor, School of Environment Tsinghua University

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