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Comparative assessment of modeling and experimental data of ammonia removal from pre-digested chicken manure

机译:氨化鸡粪氨的模拟和实验数据的比较评估

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The aim of this study was to interpret the development of Anammox activity by a mathematical model in an UASB reactor -originally inoculated with methanogenic granules- at which Anammox progress has been also experimentally observed while treating chicken manure digestate. Since ammonium is derived from anaerobic degradation of nitrogenous compounds in chicken manure similar to any other nitrogen-rich organic wastes; the reactor was operated intentionally at favorable conditions [i.e.; with external nitrite source for NH4+:NO2- approximately equal to 1.0] in order to make Anammox process to prevail as operation continued. Results indicated significant ammonia removals (60% on average) although influent concentration was gradually increased up to 200 mg L-(1). A modeling exercise has been undertaken to investigate the performance of the laboratory scale UASB reactor. In this scope, the experimental results were modeled by using Mantis2 model within GPS-X 6.5 simulation software that included several built in libraries. Accordingly, effluent chemical oxygen demand (COD) and total ammonia nitrogen (TAN) concentrations could be predicted with reasonably good accuracy demonstrating successful calibration. The regression coefficient (R-2) and mean relative absolute error (MRAE) parameters were found as 0.66 and 16% and 0.70 and 19%, respectively.
机译:本研究的目的是通过UASB反应器中的数学模型解释厌氧活性的发展 - 以甲状腺颗粒接种 - 在治疗鸡粪消化的同时还在实验观察到厌氧毒素的进展。由于铵衍生自鸡粪中氮化合物的厌氧降解,类似于其他富含氮的有机废物;反应器在有利的条件下有意操作[即;对于NH4 +:NO 2的外部亚硝酸盐源,大约等于1.0],以使ANAMMOX过程持续作为操作继续。结果表明,虽然流入浓度逐渐增加至200mg(1),但虽然流入浓度逐渐增加,但其显着的氨(60%)逐渐增加。已经开展了建模锻炼,以研究实验室规模UASB反应堆的性能。在此范围内,通过在GPS-X 6.5模拟软件中使用Mantis2模型来建模实验结果,该模拟软件包括包括几个内置库的仿真软件。因此,可以采用合理良好的准确度来预测流出的化学需氧量(COD)和总氨氮(TAN)浓度,证明成功校准。消退系数(R-2)和平均相对绝对误差(MRAE)参数分别为0.66和16%和0.70和19%。

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