The Effect of Initial Conditions with Aerobic Biological Treatment on Aniline Dyeing Wastewater
| Autor: | Xue Yang, Runkai Wang, Houjie Gong, Hongmei Liu, Wenning Mai, Huancheng Dong, Lili Yan, Heng Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine microbial 030106 microbiology Biomass Bioengineering TP1-1185 acclimation 010603 evolutionary biology 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Aniline Chemical Engineering (miscellaneous) activated sludge Organic matter QD1-999 aerobic biological treatment chemistry.chemical_classification biology Process Chemistry and Technology Chemical technology Chemical oxygen demand Biodegradation biology.organism_classification Salinity Sphingopyxis Chemistry Activated sludge chemistry Environmental chemistry aniline dyeing wastewater community structure |
| Zdroj: | Processes Volume 9 Issue 8 Processes, Vol 9, Iss 1329, p 1329 (2021) |
| ISSN: | 2227-9717 |
| DOI: | 10.3390/pr9081329 |
| Popis: | According to the characteristics of aniline dyeing wastewater, aerobic biological treatment was adopted herein, and high-throughput sequencing technology was used to analyze the changes to the microbial community structure and diversity in the aerobic sludge acclimation stage. As a result, according to the experimental study on the effects of different biomass, the initial pH value and the salinity with the aerobic biological treatment, the chemical oxygen demand (COD) degradation rate can increase linearly with the increase in biomass under different biomass conditions. The organic matter degradation rate is 6.24 mg/L COD·h−1·(mg/L·MLSS)−1, with a correlation coefficient (R2) of 0.98704. When the initial pH value is less than 7.0 ± 0.2, the COD degradation rate increases with the increase in the initial pH value and then decreases gradually. The optimal sludge concentration is 4 g/L the optimal initial pH value is in the range of 7.0–8.0 the optimal salinity is 1.7%. When the initial concentration of COD is 3000 mg/L, the COD value gradually stabilizes and decreases to 1500 mg/L after 32 h, the degradation rate reaches 50%, and the pH decreases from 7.5 to 4.5. Sphingopyxis has been detected in sludge samples from the third cycle of acclimation, which can biodegrade aromatic compounds, anthraquinone dyes, and their intermediates, and the relative abundance of Sphingopyxis increased from 0.18% to 5.08%, indicating a potential biodegradation ability of aniline dyeing wastewater. |
| Databáze: | OpenAIRE |
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