臭氧投量对SBR系统污泥沉降性能及脱氮除磷的影响 |
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引用本文: | 吕永涛,朱传首,张旭阳,徐超,潘永宝,刘爽,崔双科,王磊. 臭氧投量对SBR系统污泥沉降性能及脱氮除磷的影响[J]. 环境科学, 2021, 42(7): 3400-3404 |
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作者姓名: | 吕永涛 朱传首 张旭阳 徐超 潘永宝 刘爽 崔双科 王磊 |
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作者单位: | 西安建筑科技大学环境与市政工程学院,西安 710055;陕西省环境工程重点实验室,西安 710055;陕西省膜分离技术研究院,陕西省膜分离重点实验室,西安 710055;陕西省现代建筑设计研究院,西安 710024 |
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基金项目: | 陕西省重点研发计划项目(2020SF-415);陕西省重点科技创新团队计划项目(2017KCT-19-01);陕西省技术创新引导专项(2018HJCG-18) |
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摘 要: | 以污水厂冬季膨胀期污泥(SVI =280 mL·g-1)为对象,研究了臭氧投量对SBR系统污泥沉降性能及脱氮除磷效果的影响.结果表明,低浓度投加臭氧(0.085g·g-1,以O3/MLSS计)20 d后,菌丝体被打断,SVI降至125 mL·g-1,消除了污泥膨胀,且硝化、除磷效果不受影响.高浓度投加臭氧,污泥的沉降性...
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关 键 词: | 膨胀期污泥 臭氧投量 污泥沉降性能 脱氮除磷 胞外聚合物 |
收稿时间: | 2020-12-07 |
修稿时间: | 2021-01-04 |
Effect of Ozone Dosage on Sludge Settleability and Biological Nutrient Removal in SBR System |
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Affiliation: | School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China;Shaanxi Key Laboratory of Environmental Engineering, Xi''an 710055, China;Key Laboratory of Membrane Seperation of Shaanxi Province, Research Institute of Membrane Seperation Technology of Shaanxi Province, Xi''an 710055, China;Shaanxi Modern Architecture Design & Research Institute, Xi''an 710024, China |
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Abstract: | The effect of ozone dosage on sludge settleability and biological nutrient removal performance in a sequencing batch reactor was investigated by inoculating the bulking sludge with the SVI of 280 mL·g-1 from a wastewater treatment plant in winter. The filamentous mycelium was interrupted, and the SVI was decreased to 125 mL·g-1 after ozone dosage with a low concentration of 0.085 g·g-1(O3/MLSS) for 20 days, which indicated the disappearance of the sludge bulking. The performance of nitrification and phosphorus removal efficiency was not affected obviously. However, the sludge settleability deteriorated with a high dosage of ozone, and the phosphorus removal efficiency was decreased to around 60%. Further study showed that PS/PN had a positive correlation with SVI with the correlation coefficient of 0.9381, which can be used to characterize sludge settleability. A low ozone dosage not only interrupted the filamentous mycelium, but it also affected the content and composition of the EPS, which led to improved settleability. |
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Keywords: | bulking sludge ozone dosage sludge settleability biological nitrogen and phosphorus removal extracellular polymeric substances |
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