In this study, a composite biologically active filter (BAF) packed with suspended biological carrier (SBC), zeolite, and granular activated carbon (GAC) in order, was set to pretreat the algae-laden synthetic raw water. Over the long-term operation, stable and effective treatment was achieved under the algae concentration as high as 16.64 × 10⁸ cell/L, with average removal efficiencies of NH₄⁺-N, Total Organic Carbon (TOC), and algae cells of 97.7%, 64.0%, and 78.6%, respectively. The pollutant removal of each filter were quantitatively assessed. The results revealed zeolite mainly contributed to the adsorption of NH₄⁺-N (50.1%), GAC enriched the most functional microorganisms and contributed to nitrification (57.1%) and organics biodegradation (TOC: 63.9%, microcystin-LR (MC-LR): 96.8%). The addition of SBC filter enhanced the chemical and microbial removal ability of the BAF system. The structure and distribution of biofilm on each filter were different, GAC biofilm accumulated the most MCs degrading microbes, and the highest microbial community richness and diversity was observed in SBC biofilm. Overall, the composite BAF with zeolite-GAC-SBC is developed for algae-laden raw water pretreatment, enabling the application of BAF in drinking water pretreatment plants.

在这项研究中，设置了一个复合生物活性过滤器（BAF），依次装有悬浮生物载体（SBC）、沸石和颗粒活性炭（GAC），用于预处理含有藻类的合成原水。经过长期运行，在高达16.64×10 ⁸ cell/L的藻类浓度下实现了稳定有效的处理，NH ₄ ⁺ -N、总有机碳（TOC）和藻类细胞的平均去除效率为分别为 97.7%、64.0% 和 78.6%。对每个过滤器的污染物去除进行了定量评估。结果表明沸石主要有助于NH ₄ ⁺的吸附-N (50.1%)，GAC 富集了功能最多的微生物，并有助于硝化作用 (57.1%) 和有机物生物降解（TOC：63.9%，微囊藻毒素-LR (MC-LR)：96.8%）。SBC 过滤器的加入增强了 BAF 系统的化学和微生物去除能力。每个过滤器上生物膜的结构和分布不同，GAC生物膜积累了最多的MCs降解微生物，SBC生物膜中观察到的微生物群落丰富度和多样性最高。总的来说，沸石-GAC-SBC 复合 BAF 是为藻类原水预处理而开发的，使 BAF 在饮用水预处理厂中得到应用。