Experiments have been carried out in an inverse fluidized bed biofilm reactor (IFBBR) to study the effects of carbon to nitrogen (C/N) ratio, temperature (T), and pH on the removal of ammonia-nitrogen (NH, N) from wastewater using muxed microbial-culture IFBBR is operated at settled bed volume to reactor volume ratio (V/V) of 0.380, superficial gas velocity (U) of 0.0085 m/s, and liquid recirculation velocity (U) of 0.0021 m/s. Three initial NH, -N concentrations (40, 100, and 200 mg/L) are considered here. Effects of different parameters are studied for wastewater treatment by varying C/N ratio from 0.0 to 2.5. T from 26 to 34°C, and pH from 7.5 to 9.0. Maximum NH-N removal is observed at C/N ratio of 0.0, T of 30°C, and pH of 8.3. NHN removal is found to decrease with increase in C/N ratio. Both NO, N formation and nitrification percentage are found to decrease with increase in C/N ratio and initial NH4 N concentration Fractional Factorial Design analysis is used to predict the NH N removal. Average absolute percent deviation is found to be 11.75 implying the proposed correlation is in good agreement with experimental values. Kinetic constants are found to be higher than the values reported in literatures.

中文翻译：

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C/N比、温度和pH对逆流化床生物膜反应器去除废水中氨氮的影响

在逆流化床生物膜反应器 (IFBBR) 中进行了实验，以研究碳氮 (C/N) 比、温度 (T) 和 pH 值对去除氨氮 (NH, N) 的影响。使用混合微生物培养 IFBBR 的废水在沉降床体积与反应器体积比 (V/V) 为 0.380、表面气体速度 (U) 为 0.0085 m/s 和液体再循环速度 (U) 为 0.0021 m/s 下运行。此处考虑了三个初始 NH、-N 浓度（40、100 和 200 mg/L）。通过改变 C/N 比从 0.0 到 2.5，研究了不同参数对废水处理的影响。T 从 26 到 34°C，pH 从 7.5 到 9.0。在 C/N 比为 0.0、T 为 30°C 和 pH 为 8.3 时观察到最大 NH-N 去除。发现 NHN 去除率随着 C/N 比的增加而降低。两者都没有，N 的形成和硝化百分比随着 C/N 比的增加而降低，初始 NH4 N 浓度部分因子设计分析用于预测 NH N 的去除。发现平均绝对百分比偏差为 11.75，这意味着建议的相关性与实验值非常吻合。发现动力学常数高于文献中报道的值。