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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Effects of operational models (batch, continuous and CFID modes) on the performance of a single A(2)O airlift bioreactor for treatment of milk processing wastewater
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Effects of operational models (batch, continuous and CFID modes) on the performance of a single A(2)O airlift bioreactor for treatment of milk processing wastewater

机译：操作模型（批量，连续和CFID模式）对单一A（2）次Airlift生物反应器进行性能的影响，用于治疗牛奶加工废水

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This study surveys the effect of different operational models, batch, continuous, and continuous feeding with intermittent discharge (CFID), on the performance of an air lift reactor (ALR) and a stirred tank reactor (STR) in terms of simultaneous removal of CNP from milk processing wastewater. The experimental data were recorded under similar operating conditions with HRT of 10 h, air flow rate of 21/min, and biomass concentration of 5-6 g/l. The obtained results indicated that the CFID mode was a promising regime which ensured the occurrence of anaerobic, anoxic, and aerobic conditions in the air lift bioreactor. This gave favorable conditions for simultaneous COD and nutrient removal processes in one compartment. At the optimum condition obtained, 170 mg/l (79%) of total nitrogen (TN) and 25 mg/l (63%) phosphorus (TP) were removed in the CFID-ALR, while, batch and continuous operational conditions did not create anaerobic and efficient anoxic zones in the air lift bioreactor. The ALR was more effective to remove nutrients when compared to the STR at all different operational modes studied. The microbial community at different experimental conditions was also investigated to detect Candidatus Accumulibactor as a common species of phosphate accumulating organism (PAOs) through PCR method. From the PCR results, Candidate Accumulibactor was detected in the CFID-ALR, underpinning the observed TP removal. (C) 2017 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
机译：本研究调查不同操作模型，批次，连续和连续进料与间歇放电（CFID）的效果，以便在同时去除CNP方面的空气提升反应器（ALR）和搅拌釜反应器（STR）的性能来自牛奶加工废水。在类似的操作条件下记录实验数据，HRT为10小时，空气流速为21 / min，生物质浓度为5-6克/升。所获得的结果表明，CFID模式是有希望的制度，可确保在空气升力生物反应器中发生厌氧，缺氧和有氧病症。这对一个隔室中的同时鳕鱼和营养去除过程具有有利条件。在CFID-ALR中除去，在得到的最佳条件下，170mg / L（79％）总氮（TN）和25mg / L（63％）磷（TP），而批次和连续操作条件没有在空气提升生物反应器中创建Anaerobic和高效的缺氧区域。与所研究的所有不同操作模式相比，ALR更有效地去除营养素。还研究了不同实验条件的微生物群落，以检测Candidatus累加器作为通过PCR方法作为磷酸盐积聚生物（PAOS）的常见物种。从PCR结果中，在CFID-AL中检测到候选累加器，支撑观察到的TP去除。 （c）2017年化学工程师机构。 elsevier b.v出版。保留所有权利。

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