Composite biologically active filter (BAF) with zeolite, granular activated carbon, and suspended biological carrier for treating algae-laden raw water
Composite biologically active filter (BAF) with zeolite, granular activated carbon, and suspended biological carrier for treating algae-laden raw water
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DOI：
10.1016/j.jwpe.2021.102188
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发表时间：
2021-08
影响因子：
7
通讯作者：
Shuo Xiang;Yutong Han;Chao Jiang;Mengyan Li;Lecheng Wei;Jiashen Fu;Liang Zhu
中科院分区：
文献类型：
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作者：
Shuo Xiang;Yutong Han;Chao Jiang;Mengyan Li;Lecheng Wei;Jiashen Fu;Liang Zhu
采用悬浮生物载体（SBC）、沸石和颗粒活性炭（GAC）依次填充的复合生物活性滤池（BAF）对含藻人工合成原水进行预处理。长期运行表明，在藻类浓度高达16.64 × 108 cell/L的情况下，系统能稳定有效地处理，氨氮、总有机碳和藻类细胞的平均去除率分别为97.7%、64.0%和78.6%。定量评价了各过滤器对污染物的去除效果。结果表明，沸石主要对NH 4 +-N的吸附起作用（50.1%），活性炭富集了大部分功能微生物，并对硝化作用（57.1%）和有机物降解作用（TOC：63.9%），微囊藻毒素-LR（MC-LR）：96.8%）起作用。SBC滤池的投加提高了BAF系统对化学物质和微生物的去除能力。各滤料上生物膜的结构和分布不同，GAC生物膜中积累了最多的MCs降解微生物，SBC生物膜中微生物群落的丰富度和多样性最高。综上所述，研制出沸石-活性炭-SBC复合曝气生物滤池预处理含藻原水，为曝气生物滤池在饮用水预处理厂的应用奠定了基础。
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 × 108cell/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.