Optimization of Ammonia Stripping of Piggery Biogas Slurry by Response Surface Methodology

文献类型： 外文期刊

第一作者： Zou, Mengyuan

作者： Zou, Mengyuan;Dong, Hongmin;Zhu, Zhiping;Zhan, Yuanhang

作者机构：

关键词： response surface methodology; biogas slurry; ammonia stripping

期刊名称：INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH （ 影响因子：3.39； 五年影响因子：3.789 ）

ISSN： 1661-7827

年卷期： 2019 年 16 卷 20 期

页码：

收录情况： SCI

摘要： Ammonia stripping is a pretreatment method for piggery biogas slurry, and the effectiveness of the method is affected by many factors. Based on the results of single-factor experiments, response surface methodology is adopted to establish a quadratic polynomial mathematical model relating stripping time, pH value and gas flow rate to the average removal rate of ammonia nitrogen to explore the interactions among various influencing factors, obtain optimized combined parameters for ammonia stripping, and carry out experimental verification of the parameters. The results show that when hollow polyhedral packing is adopted under operating conditions including a stripping time of 90 min, pH value of 11, gas flow rate of 28 m(3)/h, gas-liquid ratio of 2000 and temperature of 30 degrees C, the average removal rate of ammonia nitrogen in biogas slurry can reach approximately 73%. The experimental value is only 4.2% different from the predicted value, which indicates that analysis on the interaction among factors influencing ammonia stripping of biogas slurry and parameter optimization of the regression model are accurate and effective.

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