摘要
通过对不同条件下水体的曝气增氧实验,研究了温度、浊度以及pH对曝气水体中氧传质的影响.研究结果表明:氧总转移系数KLa随着温度的升高而增大,而氧转移速率υOTR的总体趋势是缓慢减小的,但在25℃附近υOTR有增大的趋势;在不同浊度的水体中,KLa和υOTR均随着水体浊度的增加而不断增大,与水体的浊度呈明显的正相关关系;水体pH对KLa和υOTR也有一定的影响,随着pH的增加,KLa和υOTR均是先降低后增加,并在pH为7.0时达到最小值.
Effects of temperature, turbidity and pH on oxygen transition in aerated water under different conditions were studied. The results showed that the oxygen transfer coefficient （KLa） increased with the increasing temperature, while the oxygen transfer rate （VOTR） decreased except with an increasing tendency at around 25 ℃. In turbid water, KLaand uOTRare positively correlated to the level of turbidity. The pH value can also influence KLa and VOTR at certain degree. As the pH value was increased, KLa and vOTR firstly decreased and then increased, and had minimum values at pH 7.0.
出处
《中北大学学报（自然科学版）》
CAS
北大核心
2010年第1期45-49,共5页
Journal of North University of China(Natural Science Edition)
基金
国家高技术研究发展资助项目(863计划)(2005AA60101005
2007AA06Z347)
国家自然科学基金资助项目(20677038)
上海市科委创新行动计划资助项目(072312002)
关键词
温度
浊度
PH
氧传质系数
氧转移速率
temperature
turbidity
pH
oxygen transfer coefficient
oxygen transfer rate
