Abstract
The water quality range for wastewater treatment projects in the food processing industry changes constantly. To fully understand the threshold for pollutant removal with the lowest possible energy consumption, the relationship between pollutant removal and wastewater treatment conditions was established using response surface methodology (RSM). The optimum conditions for total COD, TN, and NH3-N removal from saline mustard tuber wastewater (MTWW) with a packed cage rotating biological contactor (RBC) system were investigated by experiments based on a Box-Behnken design (BBD). The independent variables were organic load (ORL), rotational disk velocity (RDV), and immersion rate (IR). Parameters of COD, TN, and NH3-N removal efficiency were selected as responses. The optimal conditions for the best COD, TN, and NH3-N removal efficiency with the lowest energy consumption were found to be at an ORL of 26.71 kg/day, a RDV of 1.62 rpm (7.62 m/s), and an IR of 46%. After the optimization, the energy cost was evaluated by coupling energy performance indicators with organic pollution efficiencies to be the highest class of performance. This research demonstrates that the suggested models have a good predicting and fitting ability in interrelations between the pollutant removal and process parameters of the packed cage RBC system treating saline MTWW.
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Material preparation, data collection, data analysis, and first draft of the manuscript were performed by YD. The financial support for the project and review was performed by YC. The formulation of conception, critical review, commentary, and revision were performed by JG. JW and YP worked on designing the research methodology. WY did experiment and worked on data analysis. All authors read and approved the final manuscript.
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Dong, Y., Chen, Y., Guo, J. et al. Treatment of mustard tuber wastewater (MTWW) using a pilot-scale packed cage rotating biological contactor system: process modeling and optimization. Environ Sci Pollut Res 28, 32057–32065 (2021). https://doi.org/10.1007/s11356-021-14307-5
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DOI: https://doi.org/10.1007/s11356-021-14307-5