Removal of COD and nitrogen from animal food plant wastewater in an intermittently-aerated structured-bed reactor.
Removal of COD and nitrogen from animal food plant wastewater in an intermittently-aerated structured-bed reactor.
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DOI：
10.1016/j.jenvman.2015.02.026
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发表时间：
2015-05
影响因子：
8.7
通讯作者：
Priscila Arcoverde Wosiack;D. D. Lopes-D.;Márcia Helena Rissato Zamariolli Damianovic;E. Foresti;D. Granato;A. C. Barana
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文献类型：
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作者：
Priscila Arcoverde Wosiack;D. D. Lopes-D.;Márcia Helena Rissato Zamariolli Damianovic;E. Foresti;D. Granato;A. C. Barana
本研究评价了连续流结构床反应器在同时去除动物食品厂废水中总氮（TN）和化学需氧量（COD）的性能。该反应器具有间歇曝气系统;水力停留时间（HRT）为一天;温度为30 °C;再循环比为流量的五倍。试验中心复合旋转描绘（CCRD）型设计被用来定义的曝气条件和氮负荷（因素）进行研究。采用响应面法分析了各因素对TN和COD去除率的影响。据观察，曝气因素显示出最大的结果的显着性和丰富的TKN浓度没有显着的影响，在95%的置信水平，对COD的去除。在整个实验过程中，COD/N比保持在3.2和3.8之间。当曝气时间为158 min，循环时间为180 min，基质中凯氏氮总量（TKN）为255 mg L− 1时，COD和TN的去除率最高，分别为80%和88%。
This study evaluated the performance of a continuous flow structured-bed reactor in the simultaneous removal of total nitrogen (TN) and chemical oxygen demand (COD) in the effluent from an animal food plant. The reactor had an intermittent aeration system; hydraulic retention time (HRT) of one day; temperature of 30 °C; and recirculation ratio of five times the flow. An experimental central composite rotational delineation (CCRD) type design was used to define the aeration conditions and nitrogen load (factors) to be studied. Response surface methodology was used to analyse the influence of the factors above the results, the removal of TN and COD. It was observed that the aeration factor showed the greatest significance for the results and that the affluent TKN concentration did not have a significant effect, at a 95% level of confidence, on COD removal. Throughout the experiment, the COD/N ratio remained between 3.2 and 3.8. The best results for COD and TN removal, 80% and 88%, respectively, were obtained with 158 min of aeration on a cycle of 180 min and 255 mg L−1of Total Kjeldahl Nitrogen (TKN) in the substrate.