好氧颗粒脱氮-溶解氧和碳氮比的影响

Pub Date : 2023-01-16 DOI:10.15255/kui.2022.034

Mirjana Galant, Dijana Grgas, Tea Štefanac, M. Habuda-Stanić, T. Landeka Dragičević

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引用次数: 0

摘要

考察了除氮效率与溶解氧(DO)浓度(DO 1 ~ 7 mg l−1)、碳氮比(COD/N 1 ~ 14)、气流(0.4 ~ 2.9 l min−1)对粒径的影响。当COD/N≥11时，平均化学需氧量(COD)去除率≥90%，但当COD/N为14时，污水排放到地表水的N值基本满足要求。建议使用成熟颗粒有效去除N和COD的DO为2 mg l−1。颗粒的大小(直径)随着气流的增加而减小

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Nitrogen Removal with Aerobic Granules – Effect of Dissolved Oxygen and Carbon/Nitrogen Ratio

Nitrogen removal efficiency related to the dissolved oxygen (DO) concentration (DO 1–7 mg l −1 ), carbon/nitrogen ratio (COD/N 1–14), and the effect of airflow (0.4–2.9 l min −1 ) related to the granule size were investigated. The average chemical oxygen demand (COD) removal of ≥ 90 % was achieved at COD/N ≥ 11, but the satisfactory N values in effluent for discharge into the surface waters were almost achieved at COD/N 14. DO of 2 mg l −1 is recommended for efficient removal of N and COD with mature granules. The size (diameter) of the granules decreases with increased airflow

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