The fluidized pellet bed (FPB) reactor is an innovative approach to wastewater treatment that efficiently removes organic substances and phosphorus. However, stability issues often hinder its application. To address this issue, we proposed a novel operational method incorporating the periodic addition of polyacrylamide (PAM). The study demonstrates that the intermittent use of PAM significantly improved the stability and operational effectiveness of the FPB system over 60 days. The removal rate for chemical oxygen demand increased from 53-60% to 63–75%, while the total phosphorus removal rate exceeded 90%. Additionally, introducing PAM contributed to the regeneration of pellets, improving their microstructure and resistance to shear forces. Fourier Transform Infrared Spectroscopy analysis indicated a strengthening of functional group signals after adding PAM, which correlated with enhanced carbon absorption. Scanning Electron Microscope examinations revealed a denser and more consistent floc structure after dosing PAM. The intermittent dosing of PAM not only enhanced the performance of the FPB reactor but also reinforced its structural integrity, representing a significant technological advancement.

中文翻译：

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聚丙烯酰胺的间歇投加提高了流化颗粒床反应器的处理效率和絮凝结构


流化颗粒床 （FPB） 反应器是一种创新的废水处理方法，可有效去除有机物质和磷。然而，稳定性问题往往会阻碍其应用。为了解决这个问题，我们提出了一种新的操作方法，包括定期添加聚丙烯酰胺 （PAM）。研究表明，间歇性使用 PAM 在 60 天内显著提高了 FPB 系统的稳定性和运行效率。化学需氧量的去除率从 53-60% 增加到 63-75%，而总磷去除率超过 90%。此外，引入 PAM 有助于颗粒的再生，改善其微观结构和抗剪切力。傅里叶变换红外光谱分析表明，添加 PAM 后官能团信号增强，这与碳吸收增强相关。扫描电子显微镜检查显示，给药 PAM 后絮凝体结构更致密、更一致。PAM 的间歇加药不仅提高了 FPB 反应器的性能，还增强了其结构完整性，这是一项重大的技术进步。