1. Stability and nutrients removal performance of a Phanerochaete chrysosporium-based aerobic granular sludge process by step-feeding and multi A/O conditions
- Author
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Junfeng Wan, Xiaoying Guo, Christophe Dagot, Pengfei Kang, Haisong Li, Yan Wang, Hao Shen, and Lihui Cui
- Subjects
Environmental Engineering ,Sewage ,biology ,Nitrogen ,Renewable Energy, Sustainability and the Environment ,Chemistry ,Pellets ,Phosphorus ,Bioengineering ,Sequencing batch reactor ,Nutrients ,General Medicine ,Phanerochaete ,biology.organism_classification ,Pulp and paper industry ,Waste Disposal, Fluid ,Aerobiosis ,Bioreactors ,Nutrient ,Scientific method ,Aeration ,Waste Management and Disposal ,Mycelium ,Chrysosporium - Abstract
A Phanerochaete chrysosporium-based aerobic granular sludge (PC-AGS) was developed by inoculating fungal mycelial pellets into a lab-scale aerobic granular sequencing batch reactor (AGSBR). A strategy using step-anaerobic feeding coupled with multi A/O conditions was adopted. The results showed that the removal efficiencies for total phosphorus (TP) and total inorganic nitrogen (TIN) were 94.56 ± 2.92% and 75.20 ± 7.74%, respectively, under relatively low aeration time. Compared with original AGS, the content of extracellular proteins for PC-AGS obviously increased from 18.61 to 41.44 mg/g MLSS by the end of phase I. Moreover, the mature granules had a larger size and better stability during the 100 days operation. Furthermore, the analysis of microbial diversity detected many key functional groups in PC-AGS granules that were beneficial to nutrients removal. This work demonstrated that the addition of fungal pellets not only enhanced the removal performance, but also improved the stability of the AGS system.
- Published
- 2021