• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>American journal of applied sciences >Performance Evaluation of an Oxidation Ditch System with a Disc Aerator
【24h】

Performance Evaluation of an Oxidation Ditch System with a Disc Aerator

机译：盘式曝气氧化沟系统的性能评估

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Problem statement: The oxidation ditch system has been used to treat various types of wastewater. Several types of aerators are used to supply the treatment process with oxygen. Among these devices, disc aerator has certain advantages regarding foam generation over the brush and paddle type rotors, but the main disadvantages of this aerator is the limited oxygenation capacity. The main objective of this study was to evaluate the effects of various design parameters and system operation parameters on the oxygenation capacity of the system. Approach: A bench scale oxidation ditch system equipped with a disc aerator was used to gain better understanding of the phenomena of oxygen transfer and to study the effects of hole diameter, number of holes per disc, disc thickness, disc speed, immersion depth and number of discs on the oxygenation capacity of the system. The unsteady state method with sulphite oxidation was used to deoxygenate the water. The test involved chemical removal of dissolved oxygen from water followed by oxygenation. The power consumed was measured, the oxygen transfer coefficient was determined and both the oxygenation capacity and oxygenation efficiency were calculated. Results: The oxygen transfer coefficient was affected by the immersion depth, hole diameter, disc speed, disc thickness and number of discs, with the disc speed having the greatest effect. The results showed that three physical processes simultaneously contributed to oxygen transfer by the disc aerator: bubble aeration, eddy aeration and surface aeration. Conclusion: The use of sodium sulphite with cobalt chloride for deoxygenation of the water via the oxidation ditch was effective and the results were consistent and repeatable. The aerator disc of 2.55 cm thickness, 1.92 cm diameter and 48 holes was found to achieve the highest oxygenation capacity. The system is anticipated to provide a broad range of oxygen transfer rates under actual conditions (23-164 mgO_2/L-h) to meet varying process demands encountered in aerobic treatment systems.
机译：问题陈述：氧化沟系统已用于处理各种类型的废水。几种类型的曝气器用于为处理过程提供氧气。在这些装置中，相比起刷式和桨式转子，盘式曝气机在泡沫生成方面具有某些优势，但是这种曝气机的主要缺点是充氧能力有限。这项研究的主要目的是评估各种设计参数和系统运行参数对系统充氧能力的影响。方法：使用配有圆盘曝气机的台式氧化沟系统，可以更好地了解氧气传输现象，并研究孔径，每张圆盘的孔数，圆盘厚度，圆盘速度，浸入深度和数量的影响碟片对系统的充氧能力的影响。使用亚硫酸盐氧化的非稳态方法对水进行脱氧。该测试涉及从水中化学去除溶解氧，然后进行氧化。测量消耗的功率，确定氧的传递系数，并计算氧合能力和氧合效率。结果：氧的传输系数受浸入深度，孔径，圆盘速度，圆盘厚度和圆盘数量的影响，其中圆盘速度影响最大。结果表明，盘式曝气机同时通过三个物理过程促进了氧气的传递：气泡曝气，涡流曝气和表面曝气。结论：亚硫酸钠和氯化钴用于通过氧化沟对水进行脱氧是有效的，结果是一致和可重复的。发现2.55厘米厚，1.92厘米直径和48个孔的曝气盘具有最高的充氧能力。预期该系统将在实际条件下提供广泛的氧气传输速率（23-164 mgO_2 / L-h），以满足需氧处理系统中遇到的各种工艺要求。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号