Oxygen-Transfer Measurement in Clean Water
Oxygen-Transfer Measurement in Clean Water
复制标题
洁净水中的氧传递测量
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
Warawitya Meesapya
中科院分区：
文献类型：
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作者：
Zhen He;A. Petiraksakul;Warawitya Meesapya
本文介绍了用解吸和吸附技术测定清水中氧传递量的实验。实验在体积为17 L的小规模罐中进行。使用纯氧来增加清洁水中的溶解氧浓度（解吸测量）。在吸收测定中加入亚硫酸钠降低溶解氧浓度。根据溶解氧浓度随时间的变化计算标准氧传递系数（KLa 20）。对于吸收法，当水量为14 L时，KLa 20的平均值为8.60h-1。同时，通过对气流条件的修正，得到了水深为0.3m时的标准氧传递效率（SOTE）在4.5-4.9%之间。为了验证水深对SOTE的影响，进行了脱附测量。溶解氧浓度和测试水温的所有数据由电子DO计读取。
This paper presents the experiments on measurement of oxygen transfer capacity in clean water by using desorption and absorption techniques. Experiments were set up in a small-scale tank with a volume of 17L. Pure oxygen was used to increase the dissolved oxygen concentration in clean water (desorption measurement). While sodium sulfite was added to decrease the dissolved oxygen concentration in absorption measurement. Standard oxygen transfer coefficient ( K L a 20 ) was calculated based on the variation of dissolved oxygen concentration with time. For the absorption method, a mean value of K L a 20 can be obtained as 8.60 h -1 with a water volume of 14L. Meanwhile, standard oxygen transfer efficiency (SOTE) was shown in the range of 4.5-4.9% with water depth 0.3m by correcting the airflow condition. Desorption measurement was investigated to certify the influence of water depth on SOTE. All the data on dissolved oxygen concentration and tested water temperature was read by an electronic DO meter.