强化混凝-滤布滤池提升城市河道水感官品质效果分析

为提高城市河道水感官品质，研究了强化混凝沉淀与滤布滤池组合工艺对河道水的处理效果。以PAC为混凝剂，纳米四氧化三铁为助凝剂，在实验室优化条件实验的基础上，设计加工强化混凝-滤布滤池一体机，在苏州姑苏区外城河进行处理规模为2 t·h⁻¹的现场实验，并采用多种分析仪器对进水、沉淀和混凝出水水样进行分析。结果表明，强化混凝滤布滤池一体化装置可以有效去除各项污染指标，显著改善河道水感官品质，装置对色度的平均去除率为67.7%，出水色度为10度；出水平均透明度提升10倍以上，最终出水3.1 m。通过对各个水质指标进行逐一分析并做相关性分析之后发现，影响色度和透明度的主要因素有悬浮固体、CDOM、藻类及叶绿素a，该装置对这些物质均有一定处理效果，因此，能够显著提升感官品质。本研究结果可为沿海城市提高河道水感官品质提供参考。

Effect analysis of enhanced coagulation-cloth-media filter filter to improve the sensory quality of urban river water

In order to improve the sensory quality of urban river water, the treatment effect of the combination process of coagulation sedimentation and filter cloth on river water was studied. PAC and nano-Fe3O4 were used as coagulant and coagulant aid, respectively. An integrated equipment of enhanced coagulation-cloth-media filter was designed and processed based on the experiments of conditions optimization in laboratory. Then a field test with a treatment scale of 2 t·h−1 was performed in Waichenghe, Gusu District, Suzhou and a variety of analytical instruments were used to analyze the water samples of inflow, sedimentation and coagulation effluent. The results showed that the integrated equipment of enhanced coagulation-cloth-media filter could effectively remove various indices of pollutants and significantly improve the sensory quality of river water. The average removal efficiency of the chromaticity was 67.7% by this integrated equipment, and the effluent chromaticity was 10 degrees. The average transparency of the effluent increased by more than 10 times, and was 3.1 meters for the final effluent. Through the analysis of each water quality index one by one and their correlation analysis, it was found that the main factors affecting the chroma and transparency were suspended solids, CDOM, algae and chlorophyll a. The device had a certain treatment effect of these substances, so it could significantly improve the sensory quality. This study can provide a reference for the improvement of the sensory quality of river water in coastal cities.