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.