旋流器进料流速调控强化污泥致密效果研究

陈亚松; 柳蒙蒙; 孙宛; 陶翔; 邵彦鋆; 王燕; 王硕; 李激

doi:10.13205/j.hjgc.202509013

旋流器进料流速调控强化污泥致密效果研究

doi: 10.13205/j.hjgc.202509013

陈亚松¹,
柳蒙蒙¹,
孙宛¹,
陶翔²,
邵彦鋆²,
王燕²,
王硕^2,3,
李激^2,3, ,

1. 中国长江三峡集团有限公司长江经济带生态环境国家工程研究中心, 武汉 430014;
2. 江南大学环境与生态学院江苏省厌氧生物技术重点实验室, 江苏无锡 214122;
3. 江苏省高校水处理技术与材料协同创新中心, 江苏苏州 215009

基金项目:

中国长江三峡集团公司科研项目（NBWL202300013）；中华人民共和国住房和城乡建设部科技项目（2024HJ01）

详细信息

作者简介:
陈亚松（1982—），男，博士，正高级工程师，主要研究方向为水环境系统治理。chen_yasong@ctg.com.cn

通讯作者:
李激（1970—），女，博士，教授，主要研究方向为污水处理工艺及技术研究和污泥处理处置与资源化研究。liji@jiangnan.edu.cn

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出版历程
- 收稿日期: 2025-05-14
- 网络出版日期: 2025-11-05
- 刊出日期: 2025-09-01

Enhancement of sludge densification by regulating hydrocyclone inlet flow velocity

1. National Engineering Research Center of Eco-Environment in the Yangtze River Economic Belt, China Three Gorges Corporation, Wuhan 430014, China;
2. Jiangsu Provincial Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, China;
3. Jiangsu Province University Water Treatment Technology and Materials Collaborative Innovation Center, Suzhou 215009, China

摘要

摘要: 通过基于水力旋流器的污泥致密化技术，有望解决污水处理厂因处理负荷增加所面临的运行瓶颈。然而，目前仍缺乏水力旋流器的运行优化调控研究，以实现污泥沉降性能的精准提高。为进一步提升该技术的致密效率，系统比较了低（1 m/s）与高（3 m/s）进料流速下湿污泥尺寸分布和沉降性能差异。结果显示，相较于低流速，高流速增强了底流与溢流污泥的分离效率，使底流内中、大型生物聚集体（≥150 μm）的占比较溢流高出10.6%。经致密技术强化后，底流污泥的SVI₃₀由101.3 mL/g降至89.1 mL/g，沉降性能显著改善（P- < 0.05），而被淘汰的溢流污泥SVI₃₀高达124.9 mL/g。在功能菌群性能方面，致密污泥的硝化、反硝化与释磷速率分别提高3.3%、7.2%和12.2%。优势菌群分析进一步揭示，兼具高EPS分泌能力与同步硝化反硝化功能的Delftia在致密组中相对丰度增加3.02%，保证了污泥的聚集以及氮去除能力的提升。相反，具有反硝化除磷潜力的Acinetobacter和Dechloromonas丰度略有下降，但仍可能在脱氮除磷功能提升中发挥关键作用。该研究明确了旋流器流速调控对污泥致密化效果的显著影响，未来有必要结合分子生物学手段与动力学建模，推动旋流器参数优化与智能控制策略的发展。
- 污泥致密技术 /
- 水力旋流器 /
- 进料流速 /
- 沉降性能 /
- 微生物种群
Abstract: The sludge densification technology based on hydrocyclone was expected to address the operational bottlenecks faced by sewage treatment plants due to the increase in treatment load. However， there was still a lack of research on operational optimization and control of hydrocyclone to achieve precise optimization on sludge settling performance. To improve the densification efficiency of this technology， this study systematically compared the differences in particle size distribution and sedimentation performance of wet sludge under low （1 m/s） and high （3 m/s） flow velocity condition. The results showed that， compared with the low flow velocity， the high flow velocity significantly enhanced the separation efficiency of the underflow and overflow sludge， making the proportion of large biological aggregates （≥150 μm） in the underflow 10.6% higher than that in the overflow sludge. After densification enhancement， the SVI₃₀ of the underflow sludge decreased from 101.3 to 89.1 mL/g， and the sedimentation performance was significantly improved （P < 0.05）， while the SVI₃₀ of the rejected overflow sludge was as high as 124.9 mL/g. In terms of functional performance， the nitrification， denitrification and phosphorus release rates of the densified sludge increased by 3.3%， 7.2% and 12.2%， respectively. The analysis of the dominant flora further revealed that the relative abundance of Delftia， which has both a high EPS secretion capacity and simultaneous nitrification and denitrification performance， increased by 3.02% in the densified group， ensuring the aggregation of sludge and improvement of nitrogen removal capacity. In addition， the abundances of Acinetobacter and Dechloromonas with potential for denitrifying phosphorus removal slightly decreased after densification， but they may still play a key role in improving the nitrogen and phosphorus removal function. This study clarified the significant impact of flow rate regulation of the hydrocyclone on sludge densification effect. In the future， it is necessary to combine molecular biological methods and kinetic modelling to promote the development of parameter optimization and intelligent control strategies for hydrocyclone.
- sludge densification system technology /
- hydrocyclone /
- flow velocity /
- settling performance /
- microbial population

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参考文献(30)

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