Performance Analysis of Anaerobic Digestion Coupled with Simultaneous Nitrification and Denitrification Process for Treating Alcohol Precipitation Wastewater of Chinese Patent Medicine
The alcohol precipitation wastewater discharged from the production of Chinese patent medicine (CPM) has an extremely high chemical oxygen demand (COD) and poor biodegradability. In this study, the biological treatment method of anaerobic digestion coupled with simultaneous nitrification and denitri...
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MDPI AG
2023-05-01
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| Online Access: | https://www.mdpi.com/2073-4441/15/10/1939 |
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| author | Xiaofeng Jia Hanxin Fan Jiawei Liang Jihua Dai Yu Sun Wenning Mai |
| author_facet | Xiaofeng Jia Hanxin Fan Jiawei Liang Jihua Dai Yu Sun Wenning Mai |
| author_sort | Xiaofeng Jia |
| collection | DOAJ |
| description | The alcohol precipitation wastewater discharged from the production of Chinese patent medicine (CPM) has an extremely high chemical oxygen demand (COD) and poor biodegradability. In this study, the biological treatment method of anaerobic digestion coupled with simultaneous nitrification and denitrification (SND) was adopted to investigate its efficiency and to explore the mechanism of pollutant degradation in this process. The results showed that after 220 days of debugging, the coupled process operated stably. The influent COD, total nitrogen (TN), ammonium (NH<sub>4</sub><sup>+</sup>-N), and lignin concentrations were 21,000 mg/L, 400 mg/L, 200 mg/L, and 1800 mg/L, respectively. The removal efficiencies of COD, TN, NH<sub>4</sub><sup>+</sup>-N, and lignin were 97%, 85%, 96%, and 75%, respectively. Spectral detection technology analysis revealed that the wastewater contained alkanes, olefins, phenols, alcohols, unsaturated organics, aromatic compounds, and humic acids. After the treatment by each unit of the process, the three-dimensional fluorescence intensity decreased by 86%; the standard volume of fluorescence area integration declined by 78%; the stretching vibration band of aromatic compounds showed peak splitting; and the molecular weight parameter value in the ultraviolet region increased. These findings demonstrated that the humic acid substances in the wastewater were degraded, and the effect of removal of the macromolecular organic matter was remarkable. |
| first_indexed | 2024-03-11T03:13:37Z |
| format | Article |
| id | doaj.art-9391287755c14991906ace9bde1a06c0 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T03:13:37Z |
| publishDate | 2023-05-01 |
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| series | Water |
| spelling | doaj.art-9391287755c14991906ace9bde1a06c02023-11-18T03:42:36ZengMDPI AGWater2073-44412023-05-011510193910.3390/w15101939Performance Analysis of Anaerobic Digestion Coupled with Simultaneous Nitrification and Denitrification Process for Treating Alcohol Precipitation Wastewater of Chinese Patent MedicineXiaofeng Jia0Hanxin Fan1Jiawei Liang2Jihua Dai3Yu Sun4Wenning Mai5School of Civil Engineering and Architecture, Zhengzhou University of Aeronautics, Zhengzhou 450015, ChinaSchool of Ecology and Environment, Zhengzhou University, Zhengzhou 450000, ChinaCollege of Public Health, Zhengzhou University, Zhengzhou 450001, ChinaResearch Center for Eco-Friendly Wastewater Purifying Engineering Technology of Henan Province, Henan Junhe Environmental Protection Technology Co., Ltd., Zhengzhou 450001, ChinaSchool of Civil Engineering and Architecture, Zhengzhou University of Aeronautics, Zhengzhou 450015, ChinaSchool of Ecology and Environment, Zhengzhou University, Zhengzhou 450000, ChinaThe alcohol precipitation wastewater discharged from the production of Chinese patent medicine (CPM) has an extremely high chemical oxygen demand (COD) and poor biodegradability. In this study, the biological treatment method of anaerobic digestion coupled with simultaneous nitrification and denitrification (SND) was adopted to investigate its efficiency and to explore the mechanism of pollutant degradation in this process. The results showed that after 220 days of debugging, the coupled process operated stably. The influent COD, total nitrogen (TN), ammonium (NH<sub>4</sub><sup>+</sup>-N), and lignin concentrations were 21,000 mg/L, 400 mg/L, 200 mg/L, and 1800 mg/L, respectively. The removal efficiencies of COD, TN, NH<sub>4</sub><sup>+</sup>-N, and lignin were 97%, 85%, 96%, and 75%, respectively. Spectral detection technology analysis revealed that the wastewater contained alkanes, olefins, phenols, alcohols, unsaturated organics, aromatic compounds, and humic acids. After the treatment by each unit of the process, the three-dimensional fluorescence intensity decreased by 86%; the standard volume of fluorescence area integration declined by 78%; the stretching vibration band of aromatic compounds showed peak splitting; and the molecular weight parameter value in the ultraviolet region increased. These findings demonstrated that the humic acid substances in the wastewater were degraded, and the effect of removal of the macromolecular organic matter was remarkable.https://www.mdpi.com/2073-4441/15/10/1939CPM wastewateralcohol precipitationanaerobic digestionSNDoperational performance |
| spellingShingle | Xiaofeng Jia Hanxin Fan Jiawei Liang Jihua Dai Yu Sun Wenning Mai Performance Analysis of Anaerobic Digestion Coupled with Simultaneous Nitrification and Denitrification Process for Treating Alcohol Precipitation Wastewater of Chinese Patent Medicine Water CPM wastewater alcohol precipitation anaerobic digestion SND operational performance |
| title | Performance Analysis of Anaerobic Digestion Coupled with Simultaneous Nitrification and Denitrification Process for Treating Alcohol Precipitation Wastewater of Chinese Patent Medicine |
| title_full | Performance Analysis of Anaerobic Digestion Coupled with Simultaneous Nitrification and Denitrification Process for Treating Alcohol Precipitation Wastewater of Chinese Patent Medicine |
| title_fullStr | Performance Analysis of Anaerobic Digestion Coupled with Simultaneous Nitrification and Denitrification Process for Treating Alcohol Precipitation Wastewater of Chinese Patent Medicine |
| title_full_unstemmed | Performance Analysis of Anaerobic Digestion Coupled with Simultaneous Nitrification and Denitrification Process for Treating Alcohol Precipitation Wastewater of Chinese Patent Medicine |
| title_short | Performance Analysis of Anaerobic Digestion Coupled with Simultaneous Nitrification and Denitrification Process for Treating Alcohol Precipitation Wastewater of Chinese Patent Medicine |
| title_sort | performance analysis of anaerobic digestion coupled with simultaneous nitrification and denitrification process for treating alcohol precipitation wastewater of chinese patent medicine |
| topic | CPM wastewater alcohol precipitation anaerobic digestion SND operational performance |
| url | https://www.mdpi.com/2073-4441/15/10/1939 |
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