新型摆动式超细格栅的运行效果及污染机理

程远韬; 张宗胜; 张杰; 吴志超; 藏莉莉

doi:10.13205/j.hjgc.202606020

新型摆动式超细格栅的运行效果及污染机理

doi: 10.13205/j.hjgc.202606020

1. 同济大学环境科学与工程学院, 上海 200092;
2. 上海子征环保科技有限公司, 上海 200086

详细信息

作者简介:
程远韬(2000-),男,硕士研究生,主要研究方向为预处理技术及MBR工艺优化。EnvECheng@163.com

通讯作者:
张杰(1972-),男,博士,主要研究方向为排水系统及水污染治理。91102@tongji.edu.cn

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出版历程
- 收稿日期: 2025-09-10
- 录用日期: 2025-11-26
- 修回日期: 2025-11-19
- 网络出版日期: 2026-07-06

Operational efficiency and fouling mechanism of a novel swinging ultra-fine screen

1. College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;
2. Shanghai Zizheng Environmental Protection Technology Co., Ltd., Shanghai 200086, China

摘要

摘要: 针对我国城镇污水处理厂普遍存在的进水泥砂量超设计值、碳源不足问题，以及传统预处理工艺（格栅+沉砂池+初沉池）对细微泥砂去除效率低、碳源保留率低等缺陷，开发了一种新型摆动式超细格栅预处理设备。该设备筛分精度达到0.1 mm。在1000 m³/d中试规模下，系统测试了0.05~0.4 mm等不同孔径筛网摆动式超细格栅的污染物去除效能，并通过粒度分析、COD组分划分及污染层表征探究其作用机理。结果表明：0.1 mm摆动式超细格栅对SS去除率达89.3%（传统预处理工艺为57.4%），COD去除率仅为9.5%（传统预处理工艺为28.6%），碳源保留率达93%，可近乎完全截留粒径>0.1 mm的颗粒，对0.075~0.1 mm颗粒的去除率>98%，在COD、SS波动下性能稳定，并提出了微网污染的三阶段理论。0.1 mm摆动式超细格栅首次将筛分精度提高至0.1 mm，显著提升了细微泥砂的截留效率以及有效碳源的保留率，抗水质波动能力强。
- 摆动式超细格栅 /
- 预处理 /
- 细微泥砂截留 /
- 碳源保留 /
- 筛网污染
Abstract: In response to the widespread challenges faced by municipal wastewater treatment plants in China， such as influent grit loads exceeding design standards and insufficient carbon sources， as well as the limitations of conventional pretreatment processes （including screening， grit chambers， and primary sedimentation tanks）—namely， low removal efficiency of fine grit and poor retention of carbon sources—this study developed a novel pretreatment device known as the swinging ultra-fine screen. With a screening precision of 0.1 mm， the system was tested at a pilot scale of 1000 m³/d to systematically evaluate the pollutant removal efficiency of swinging ultra-fine screens with various aperture sizes ranging from 0.05 mm to 0.4 mm. The mechanisms were further investigated through particle size distribution analysis， COD fractionation， and characterization of the fouling layer. The results demonstrated that the swinging ultra-fine screen with a 0.1 mm aperture achieved an SS removal efficiency of 89.3%， significantly higher than the 57.4% obtained with conventional pretreatment processes. Meanwhile， the COD removal efficiency was only 9.5%， much lower than the 28.6% observed in traditional systems， indicating a carbon source retention efficiency as high as 93%. The device almost completely retained particles larger than 0.1 mm and achieved a removal efficiency exceeding 98% for particles in the 0.075 to 0.1 mm range. It also exhibited stable performance under fluctuating COD and SS conditions. Based on the experimental observations， a three-stage fouling theory for micro-screens was proposed. The 0.1 mm swinging ultra-fine screen represents a breakthrough by increasing the screening precision to 0.1 mm for the first time. It significantly enhances the removal efficiency of fine grit and effectively preserves bioavailable carbon sources， while demonstrating strong resilience to variations in water quality.
- swinging ultra-fine screen /
- pretreatment /
- fine grit retention /
- carbon source retention /
- screen fouling

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