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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Wastewater Treatment by Periodic Biofilter Characterized by Aerobic Granular Biomass
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Wastewater Treatment by Periodic Biofilter Characterized by Aerobic Granular Biomass

机译：好氧颗粒生物质表征的周期性生物滤池处理废水

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摘要

The paper reports the results of an experimental investigation aimed at evaluating the role of hydrodynamic conditions on generation and main properties of granular biomass grown under aerobic conditions in a periodic packed bed reactor. During the start-up period, the trend of the hydrodynamic shear forces, calculated by a methodology previous developed by authors, provided a key for explaining the process of biomass granulation. The granular biomass was characterized by a high density (i.e., 70-120 gVSS/L_(biomass)) that permitted to achieve a biomass concentration such high as 20-38 gVSS/L_(bed). The biomass density increased with the increase of shear forces. The EPS (Extracellular Polymeric Substances) content of the biomass (5-7% of the total organic matter) was not affected by hydrodynamic shear forces as well as the biomass protein content. Periodic packed bed reactor applied to a municipal wastewater showed performances very satisfactory with high efficiencies removal (around 90%) for both COD and ammonia, up to an applied organic loading value of 5.7 kgCOD/m~3·d, and negligible sludge production.
机译：本文报道了旨在评估流体动力学条件对周期性填充床反应器中好氧条件下生长的颗粒状生物质的产生和主要特性的作用的实验研究结果。在启动阶段，通过作者先前开发的方法计算出的流体动力剪切力趋势为解释生物质制粒过程提供了关键。颗粒状生物质的特征在于高密度（即70-120gVSS / L_（生物质）），其允许达到例如20-38gVSS / L_（床）的生物质浓度。生物质密度随着剪切力的增加而增加。生物质的EPS（细胞外聚合物质）含量（占总有机物的5-7％）不受流体动力剪切力以及生物质蛋白质含量的影响。应用于城市污水的定期填充床反应器表现出非常令人满意的性能，对COD和氨的去除效率很高（约90％），施加的有机负荷值高达5.7 kgCOD / m〜3·d，污泥的产生可忽略不计。

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