<br>预沉淀过程中沉淀污泥水中颗粒物和溶解性有机物的去除：性能和机理,Journal of Environmental Sciences

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预沉淀过程中沉淀污泥水中颗粒物和溶解性有机物的去除：性能和机理
Journal of Environmental Sciences ( IF 5.9 ) Pub Date : 2023-12-06 , DOI: 10.1016/j.jes.2023.11.026
Shule Duan ₁ , Huiyu Dong ₁ , Caifang Jiang ₂ , Hong Liang ₂ , Ling Jiang ₂ , Qian Xu ₂ , Xiaoyu Cheng ₁ , Zhimin Qiang ₁

Affiliation

沉淀污泥水（SSW）是饮用水处理厂废水的主要成分，在其处理和利用方面受到的关注有限，这可能是由于管理 SSW 污泥存在困难。本研究通过将 SSW 与有据可查的废水（过滤器反冲洗水 (FBW)）进行比较，全面评估了 SSW 的水质。此外，还研究了预沉降过程中SSW中污染物的变化，探讨了潜在的反应机理，并探讨了采用中试混凝沉淀工艺处理SSW的可行性。 SSW 和 FBW 之间大多数水质参数的水平大致相当。在 SSW 预沉淀过程中，观察到浑浊度、细菌计数和溶解有机物 (DOM) 显着去除。 DOM 成分、分子量分布和光学性质的表征表明，大分子蛋白质生物聚合物和腐殖酸被优先去除。颗粒特征表明，SSW 铝残留物具有高表面能、zeta 电位和桥联/吸附/沉降/混凝能力，强调了其作为混凝剂的潜力，促进无机-有机复合物的生成和沉降。混凝沉淀工艺可以有效去除低浊度SSW（[浊度]<15 NTU）中的污染物。这些发现为预沉淀过程中SSW的水质动态提供了宝贵的见解，有助于SSW质量管理的发展并提高其回用率。

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Removal of particulate matter and dissolved organic matter from sedimentation sludge water during pre-sedimentation process: Performances and mechanisms

Sedimentation sludge water (SSW), a prominent constituent of wastewater from drinking water treatment plants, has received limited attention in terms of its treatment and utilization likely due to the perceived difficulties associated with managing SSW sludge. This study comprehensively evaluated the water quality of SSW by comparing it to a well-documented wastewater (filter backwash water (FBW)). Furthermore, it investigated the pollutant variations in the SSW during pre-sedimentation process, probed the underlying reaction mechanism, and explored the feasibility of employing a pilot-scale coagulation-sedimentation process for SSW treatment. The levels of most water quality parameters were generally comparable between SSW and FBW. During the pre-sedimentation of SSW, significant removal of turbidity, bacterial counts, and dissolved organic matter (DOM) was observed. The characterization of DOM components, molecular weight distributions, and optical properties revealed that the macromolecular proteinaceous biopolymers and humic acids were preferentially removed. The characterization of particulates indicated that high surface energy, zeta potential, and bridging/adsorption/sedimentation/coagulation capacities in aluminum residuals of SSW, underscoring its potential as a coagulant and promoting the generation and sedimentation of inorganic-organic complexes. The coagulation-sedimentation process could effectively remove pollutants from low-turbidity SSW ([turbidity] < 15 NTU). These findings provide valuable insights into the water quality dynamics of SSW during the pre-sedimentation process, facilitating the development of SSW quality management and enhancing its reuse rate.

更新日期：2023-12-06

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