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Dr. Ali Zarei-Baygi



Mashhad, Iran



Ph.D. Environmental Engineering, University of Southern California 

M.S. Environmental Engineering, Sharif University of Technology

B.S. Civil Engineering-Water and Wastewater, Power and Water University of Technology


Current Research

Evaluating antiobitic resistance in agricultral reuse water generated by anaerobic processes.


Journal Publications

Zarei-Baygi A, Smith AL. 2021. Intracellular versus extracellular antibiotic resistance genes in the environment: Prevalence, horizontal transfer, and mitigation strategies. Bioresource technology. 


Baygi, A. Z., Wang, P., Harb, M., Stadler, L. B., & Smith, A. L. 2020. Membrane fouling inversely impacts intracellular and extracellular antibiotic resistance gene abundances in the effluent of an anaerobic membrane bioreactor. Environmental science & technology.


AZ Baygi, M Harb, P Wang, L Stadler, AL Smith, 2020. Microbial community and antibiotic resistance profiles of biomass and effluent are distinctly affected by antibiotics addition to an anaerobic membrane bioreactor.  Environmental Science: Water Research & Technology. 


Harb, M., P. Wang, A. Zarei-Baygi, M. Plumlee, and A.L. Smith, 2019. Background antibiotic resistance and microbial communities in an urban aquifer influence advanced purified water after groundwater recharge. Environmental Science & Technology Letters.

Zarei-Baygi, A., M. Harb, P. Wang, L.B. Stadler, and A.L. Smith, 2019. Evaluating antibiotic resistance gene correlations with antibiotic exposure conditions in anaerobic membrane bioreactors. Environmental Science & Technology 53(7), 3599-3609.

P Wang, M Harb, A Zarei-Baygi, LB Stadler, AL Smith. 2019. Comparative analysis of intracellular and extracellular antibiotic resistance gene abundance in anaerobic membrane bioreactor effluent. BioRxiv, 702076

 Zarei-Baygi, Ali, Mohammadreza Moslemi, and Seyyed Hossein Mirzaei. "The combination of KMnO 4 oxidation and polymeric flocculation for the mitigation of membrane fouling in a membrane bioreactor." Separation and Purification Technology 159 (2016): 124-134.

Conference Presentations

1. Zarei Baygi, A., L.B. Stadler, and A.L. Smith, 2017. Comparative evaluation of antibiotic resistance in full-scale activated sludge systems and bench-scale anaerobic membrane bioreactor. AEESP Conference, June 20-22, Ann Arbor, Michigan.

Fun Facts 

Enjoys playing soccer and volleyball and watching movies and TV series.

920 Downey Way. BHE 221

Astani Department of Civil and Environmental Engineering

University of Southern California