Journal Articles

  1.  Park, JH., Kang,HJ., Kim, HS., Wells, GF., Park, HD. “Effects of alkali-treated sludge supplementation for enhanced biological phosphorus removal in a membrane bioreactor.Fuel (2019).
  2.  Gao, H., LaVergne, J.M., Carpenter, C. M. G., Desai, R., Zhang, X., Gray, K., Helbling, D. E., & Wells, G. F. “Exploring co-occurrence patterns between organic micropollutants and bacterial community structure in a mixed-use watershed.Environmental Science: Processes & Impacts (2019).
  3. Wu, L., Ning, D., Zhang, B., Li, Y., Zhang, P., Shan, X., Zhang, Q., Brown, M., Li, Z., Van Nostrand, J. D., Ling, F., Xiao, N., Vierheilig, J., Wells, G. F., Yang, Y., Deng, Y., Tu, Q., Wang, A., Global Water Microbiome Consortium, Zhang, T., He, Z., Keller, J., Nielsen, P., Alvarez, P. J. J., Criddle, C. S., Wagner, M., Tiedje, J. M., He, Q., Curtis, T. P., Stahl, D. A., Alvarez-Cohen, L., Rittmann, B. E., Wen, X., & Zhou, J. “Global Diversity and Biogeography of Bacterial Communities in Wastewater Treatment Plants.Nature Microbiology (2019).
  4. Roots, P., Wang, Y., Rosenthal, A., Griffin, J., Sabba, F., Petrovich, M., Yang, F., Kozak, J., Zhang, H., & Wells, G. F. “Comammox Nitrospira are the dominant ammonia oxidizers in a mainstream low dissolved oxygen nitrification reactor.Water Research (2019).
  5. Wells, G. F. & Frigon, D. “Microbial immigration in wastewater treatment systems: analytical considerations and process implications.Current Opinions in Biotechnology (In Press).
  6. Park, J.-H., Kim, D.-H., Kim, H.-S., Wells, G. F., & Park, H.-D “Granular activated carbon supplementation alters the metabolic flux of Clostridium butyricum for enhanced biohydrogen production.Bioresource Technology (2019).
  7. Gao, H., Mao, Y. Zhao, X., Liu, W.-T., Zhang, T., & Wells, G. F. “Genome-centric metagenomics resolves microbial diversity and prevalent truncated denitrification pathways in a denitrifying PAO-enriched bioprocess. Water Research (2019).
  8. Cai, M., Wang, Q., Wells, G. F., Lian, G., Song, Z., Jin, M., Hu, J., & Wei, Z. “Improving dewaterability and filterability of activated sludge by three-dimensional electrochemical fenton treatment.Chemical Engineering Journal (2019).
  9. Laureni, M., Weissbrodt, D. G., Villez, K., Robin, O., de Jonge, N., Rosenthal, A., Wells, G. F., Nielsen, J. L., Morgenroth, E., & Joss, A. “Biomass segregation between biofilm and flocs improves the control of nitrite oxidizing bacteria in mainstream partial nitritation and anammox.Water Research (2019).
  10. Liou, H.-C., Sabba, F., Packman, A., Wells, G. F., & Balogun, O. “Nondestructive characterization of soft materials and biofilms by measurement of guided elastic wave propagation using optical coherence elastography.Soft Matter (2019).
  11. Petrovich, M., Rosenthal, A., Griffin, J., & Wells, G. F. “Spatially resolved abundances of antibiotic resistance genes and intI1 in wastewater treatment biofilms.Biotechnology & Bioengineering. (2018).
  12. Sabba, F., Terada, A., Wells, G. F., Smets, B., & Nerenberg, R. “Nitrous oxide emissions from biofilm processes.” Applied Microbiology and Biotechnology (2018).
  13. Rosenthal, A., Griffin, J., Wagner, M., Packman, A., Balogun, O., and Wells, G. F. “Morphological analysis of pore size and connectivity in a thick mixed-culture biofilm.” Biotechnology & Bioengineering (2018).
  14. Griffin, J., Taw, E., Gosavi, A., Thornburg, N., Pramanda, I., Lee, H.-S., Gray, K., Notestein, J., & Wells, G. F. “A hybrid approach for selective sulfoxidation via bioelectrochemically derived hydrogen peroxide over a niobium(V)-silica catalyst.” ACS Sustainable Chemistry & Engineering (2018).
  15. Cai, M., Hu, J.-Q., Wells, G. F., Seo, Y., Spinney, R., Ho, S.-H., Dionysiou, D., Su, J. Xiao, R., & Wei, Z. “Understanding mechanisms of synergy between acidification and ultrasound treatments for activated sludge dewatering: from bench to pilot-scale investigation.” Environmental Science & Technology (2018).
  16. Petrovich, M., Chu, B., Wright, D., Griffin, J., Elfeki, M., Murphy, B., Poretsky, R., & Wells, G. F. “Antibiotic resistance genes show enhanced mobilization through suspended growth and biofilm-based wastewater treatment processes.FEMS Microbiology Ecology (2018).
  17. Chu, Binh TT, Morgan L. Petrovich, Adit Chaudhary, Dorothy Wright, Brian Murphy, George Wells, and Rachel Poretsky. “Metagenomic analysis reveals the impact of wastewater treatment plants on the dispersal of microorganisms and genes in aquatic sediments.” Applied and Environmental Microbiology (2017).
  18. Feng, Jie, Bing Li, Xiaotao Jiang, Ying Yang, George F. Wells, Tong Zhang, and Xiaoyan Li. “Antibiotic resistome in a large‐scale healthy human gut microbiota deciphered by metagenomic and network analyses.” Environmental Microbiology (2017).
  19. Griffin, James S., Nanxi Lu, Naseer Sangwan, Angang Li, Melissa Dsouza, Andrew J. Stumpf, Tiffany Sevilla et al. “Microbial diversity in an intensively managed landscape is structured by landscape connectivity.” FEMS Microbiology Ecology (2017).
  20. Fumasoli, Alexandra, Helmut Buergmann, David G. Weissbrodt, George F. Wells, Karin Beck, Joachim Mohn, Eberhard Morgenroth, and Kai M. Udert. “Growth of Nitrosococcus-related ammonia oxidizing bacteria coincides with extremely low pH values in high strength nitrogen wastewater.” Environmental Science & Technology (2017).
  21. Petrovich, Morgan, Chia-Yun Wu, Alex Rosenthal, Kuan-Fu Chen, Aaron I. Packman, and George F. Wells. “Nitrosomonas europaea biofilm formation is enhanced by Pseudomonas aeruginosa.” Fems Microbiology Ecology (2017).
  22. Wells, George F., Yongjiang Shi, Michele Laureni, A. Rosenthal, Ilona Szivák, D. G. Weissbrodt, Adriano Joss, H. Buergmann, D. R. Johnson, and Eberhard Morgenroth. “Comparing the resistance, resilience, and stability of replicate moving bed biofilm and suspended growth combined nitritation–anammox reactors.” Environmental Science & Technology (2017).
  23. Gao, Han, Miaomiao Liu, James S. Griffin, Longcheng Xu, Da Xiang, Yaniv D. Scherson, Wen-Tso Liu, and George F. Wells. “Complete Nutrient Removal Coupled to Nitrous Oxide Production as a Bioenergy Source by Denitrifying Polyphosphate-Accumulating Organisms.” Environmental Science & Technology (2017).
  24. Griffin, James S., and George F. Wells. “Regional synchrony in full-scale activated sludge bioreactors due to deterministic microbial community assembly.” The ISME journal (2017).
  25. Shi, Yijing, George Wells, and Eberhard Morgenroth. “Microbial activity balance in size fractionated suspended growth biomass from full-scale sidestream combined nitritation-anammox reactors.” Bioresource Technology (2016).
  26. Vannecke, Thomas PW, George Wells, Nathalie Hubaux, Eberhard Morgenroth, and Eveline IP Volcke. “Considering microbial and aggregate heterogeneity in biofilm reactor models: how far do we need to go?.” Water Science and Technology (2015).
  27. Hubaux, N., G. Wells, and E. Morgenroth. “Impact of coexistence of flocs and biofilm on performance of combined nitritation-anammox granular sludge reactors.” Water Research (2015).
  28. Wells, George F., Cindy H. Wu, Yvette M. Piceno, Brad Eggleston, Eoin L. Brodie, Todd Z. DeSantis, Gary L. Andersen, Terry C. Hazen, Christopher A. Francis, and Craig S. Criddle.”Microbial biogeography across a full-scale wastewater treatment plant transect: evidence for immigration between coupled processes.” Applied Microbiology and Biotechnology. (2014)
  29. Han Gao, Yaniv D. Scherson, and George F. Wells.”Towards energy neutral wastewater treatment: methodology and state of the art.” Environmental Science: Processes & Impacts. (2014)
  30. Kim, Taek-Seung, Ju-Yong Jeong, George F. Wells, and Hee-Deung Park. “General and rare bacterial taxa demonstrating different temporal dynamic patterns in an activated sludge bioreactor.” Applied Microbiology and Biotechnology. (2013)
  31. Scherson, Yaniv D., George F. Wells, Sung-Geun Woo, Jangho Lee, Joonhong Park, Brian J. Cantwell, and Craig S. Criddle. “Nitrogen removal with energy recovery through N 2 O decomposition.” Energy & Environmental Science. (2013)
  32. Schreiber, Frank, Pascal Wunderlin, Kai M. Udert, and George F. Wells. “Nitric oxide and nitrous oxide turnover in natural and engineered microbial communities: biological pathways, chemical reactions, and novel technologies.” Frontiers in Microbiology. (2012)
  33. Biller, Steven J., Annika C. Mosier, George F. Wells, and Christopher A. Francis. Global biodiversity of aquatic ammonia-oxidizing archaea is partitioned by habitat. Frontiers in Microbiology. (2012)
  34. Wells, George F., Hee-Deung Park, Brad Eggleston, Christopher A. Francis, and Craig S. Criddle. “ Fine-scale bacterial community dynamics and the taxa–time relationship within a full-scale activated sludge bioreactor.” Water Research. (2011)
  35. Ofiţeru, Irina Dana, Mary Lunn, Thomas P. Curtis, George F. Wells, Craig S. Criddle, Christopher A. Francis, and William T. Sloan. “Combined niche and neutral effects in a microbial wastewater treatment community.” Proceedings of the National Academy of Sciences. (2010)
  36. Wang, Xiaohui, Xianghua Wen, Craig Criddle, George Wells, Jie Zhang, and Yin Zhao. “Community analysis of ammonia-oxidizing bacteria in activated sludge of eight wastewater treatment systems.” Journal of Environmental Sciences. (2010)
  37. Xie, Xing, Liangbing Hu, Mauro Pasta, George F. Wells, Desheng Kong, Craig S. Criddle, and Yi Cui. “Three-dimensional carbon nanotube− textile anode for high-performance microbial fuel cells.” Nano Letters. (2010)
  38. Zhang, T., T. Jin, Q. Yan, M. Shao, G. Wells, C. Criddle, and H. H. P Fang. “Occurrence of ammonia‐oxidizing Archaea in activated sludges of a laboratory scale reactor and two wastewater treatment plants.” Journal of Applied Microbiology. (2009)
  39. Wells, George F., Hee‐Deung Park, Chok‐Hang Yeung, Brad Eggleston, Christopher A. Francis, and Craig S. Criddle. “Ammonia‐oxidizing communities in a highly aerated full‐scale activated sludge bioreactor: betaproteobacterial dynamics and low relative abundance of Crenarchaea.” Environmental Microbiology. (2009)
  40. Park, Hee-Deung, George F. Wells, Hyokwan Bae, Craig S. Criddle, Christopher A. Francis. “Occurrence of ammonia-oxidizing archaea in wastewater treatment plant bioreactors.” Applied and Environmental Microbiology. (2006)



  1. Cantwell, Brian J., Craig S. Criddle, Kevin Lohner, Yaniv D. Scherson, and George F. Wells. “Microbial production of nitrous oxide coupled with chemical reaction of gaseous nitrous oxide.” U.S. Patent 8,932,847, issued January 13, 2015.

Book Chapters

  1. Scherson, Yaniv D., Zeynep Erdal, and George Wells. “Future Issues and Considerations of Nutrient Management in Wastewater Treatment.” In Shortcut Nitrogen Removal-Nitrite Shunt and Deammonification. Water Environment Federation, 2015.