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首页> 外文期刊>Bioprocess and Biosystems Engineering >Effects of intermittent aeration periods on a structured-bed reactor continuously fed on the post-treatment of sewage anaerobic effluent
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Effects of intermittent aeration periods on a structured-bed reactor continuously fed on the post-treatment of sewage anaerobic effluent

机译：间歇曝气时间对结构化床反应器连续进水对污水厌氧废水后处理的影响

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This study assessed the simultaneous nitrification and denitrification processes and remaining organic matter removal from anaerobic reactor effluent treating wastewater in a single reactor. A structured-bed reactor, with polyurethane foam as support media, was subjected to intermittent aeration and effluent recirculation. Aeratedon-aerated periods varied in the range of 2/1-1/3 h. The chemical oxygen demand (COD) in the effluent remained between 26 and 42 mg L-1 throughout all the aeration conditions. Aeration periods of 1/2 h removed 80 and 26% of Total Kjeldahl Nitrogen and Total Nitrogen, respectively. A low solid production was observed during the 300 days of operation, resulting in a solid retention time of 139 days. The results indicate that the non-aerated periods generated alkalinity that favored nitrification, maintaining low COD concentrations in the effluent. The structured bed reactor presented a low solid production and effluent loss below 20 mgSSV L-1, similar to concentrations obtained in secondary decanters.
机译：这项研究评估了同时进行的硝化和反硝化过程以及在单个反应器中处理厌氧反应器废水中剩余有机物的去除量。对以聚氨酯泡沫为载体的结构化床反应器进行间歇通气和废水再循环。充气/非充气时间范围为2 / 1-1 / 3 h。在所有曝气条件下，废水中的化学需氧量（COD）保持在26至42 mg L-1之间。 1/2 h的曝气时间分别去除了凯氏定氮和总氮的80％和26％。在运行的300天中观察到较低的固体生成量，导致固体保留时间为139天。结果表明，非曝气期产生的碱度有利于硝化作用，使废水中的COD浓度保持较低。结构化床反应器的固体产量低，流出物损失低于20 mgSSV L-1，与二级倾析器中的浓度相似。

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