Publications

Zhai, M.; Zeng, Q.; Qiu, R.; Li, J.; Zhu, Q.; Waite, T. D.; Ni, B.-J.; Duan, H.* (2026) WaterRAG: A Multiagent Retrieval-Augmented Generation Framework to Support Water Industry Transitions to Net-Zero. Environmental Science & Technology. DOI: 10.1021/acs.est.5c15806.

Duan, H., Li, J. and Yuan, Z. (2024) Making waves: Knowledge and data fusion in urban water modelling. Water Research X, 100234.

Duan, H.; Watt, S.; Erler, D.; Li, H.; Wang, Z.; Zheng, M.; Hu, S.; Ye, L.; Yuan, Z. (2024) Coarse bubble mixing in anoxic zone greatly stimulates nitrous oxide emissions from biological nitrogen removal process. Water Research X, 25, 100263. DOI: https://doi.org/10.1016/j.wroa.2024.100263.

Zhao, Y.; Duan, H.*; Erler, D.; Yuan, Z.; Ye, L. (2023) Decoupling the simultaneous effects of NO2−, pH and free nitrous acid on N2O and NO production from enriched nitrifying activated sludge. Water Research, 245, 120609. DOI: https://doi.org/10.1016/j.watres.2023.120609.

Li, K., Duan, H.*, Liu, L., Qiu, R., van den Akker, B., Ni, B.-J., Chen, T., Yin, H., Yuan, Z., & Ye, L. (2022). An Integrated First Principal and Deep Learning Approach for Modeling Nitrous Oxide Emissions from Wastewater Treatment Plants. Environmental Science & Technology, 56(4), 2816-2826.

Zhao, Y.; Ab Hamid, N. H.; Reddy, N.; Zheng, M.; Yuan, Z.; Duan, H.*; Ye, L. (2022) Wastewater Primary Treatment Using Forward Osmosis Introduces Inhibition to Achieve Stable Mainstream Partial Nitrification. Environmental Science & Technology, 56 (12), 8663-8672. DOI: 10.1021/acs.est.1c05672.

Duan, H., Watts, S., Zheng, M., Wang, Z., Zhao, J., Li, H., Liu, P., Dwyer, J., McPhee, P., Rattier, M., Larsen, E., Yuan, Z., & Hu, S. (2022). Achieving robust mainstream nitrite shunt at pilot-scale with integrated sidestream sludge treatment and step-feed. Water Research, 223, 119034.

Calderon, A. G., Duan, H.*, Chen, X., Wu, Z., Yu, W., Silva, C. E., Li, Y., Shrestha, S., Wang, Z., Keller, J., Chen, Z., Yuan, Z., & Hu, S. (2021). Enhancing anaerobic digestion using free nitrous acid: Identifying the optimal pre-treatment condition in continuous operation. Water Research, 205, 117694.

Duan, H., Zhao, Y., Koch, K., Wells, G. F., Zheng, M., Yuan, Z., & Ye, L. (2021). Insights into Nitrous Oxide Mitigation Strategies in Wastewater Treatment and Challenges for Wider Implementation. Environmental Science & Technology, 55(11), 7208-7224.

Duan, H., van den Akker, B., Thwaites, B. J., Peng, L., Herman, C., Pan, Y., Ni, B.-J., Watt, S., Yuan, Z., & Ye, L. (2020). Mitigating nitrous oxide emissions at a full-scale wastewater treatment plant. Water Research, 185, 116196.

Duan, H., Gao, S., Li, X., Ab Hamid, N. H., Jiang, G., Zheng, M., Bai, X., Bond, P. L., Lu, X., Chislett, M. M., Hu, S., Ye, L., & Yuan, Z. (2020). Improving wastewater management using free nitrous acid (FNA). Water Research, 171, 115382.

Duan, H., Ye, L., Wang, Q., Zheng, M., Lu, X., Wang, Z., & Yuan, Z. (2019). Nitrite oxidizing bacteria (NOB) contained in influent deteriorate mainstream NOB suppression by sidestream inactivation. Water Research, 162, 331-338.

Duan, H., Ye, L., Lu, X., & Yuan, Z. (2019). Overcoming Nitrite Oxidizing Bacteria Adaptation through Alternating Sludge Treatment with Free Nitrous Acid and Free Ammonia. Environmental Science & Technology, 53(4), 1937-1946.

Duan, H., Ye, L., Lu, X., Batstone, D. J., & Yuan, Z. (2019). Self-Sustained Nitrite Accumulation at Low pH Greatly Enhances Volatile Solids Destruction and Nitrogen Removal in Aerobic Sludge Digestion. Environmental Science & Technology, 53(3), 25-34.

Wang, Q.1*; Duan, H.1,*; Wei, W.; Ni, B.-J.; Laloo, A.; Yuan, Z. (2017) Achieving Stable Mainstream Nitrogen Removal via the Nitrite Pathway by Sludge Treatment Using Free Ammonia. Environmental Science & Technology 51 (17), 9800-9807. DOI: 10.1021/acs.est.7b02776.

Duan, H.; Ye, L.; Erler, D.; Ni, B.-J.; Yuan, Z. (2017) Quantifying nitrous oxide production pathways in wastewater treatment systems using isotope technology – A critical review. Water Research, 122, 96-113. DOI: https://doi.org/10.1016/j.watres.2017.05.054.