首页 馆藏资源 舆情信息 标准服务 科研活动 关于我们
现行 AWWA REUSE52109
到馆提醒
收藏跟踪
购买正版
Comparison of UV Disinfection Technologies for Meeting California Wastewater Reclamation Criteria 满足加州废水回收标准的紫外线消毒技术比较
发布日期: 2000-01-01
在加利福尼亚州,任何紫外线(UV)消毒系统都被用作 废水回收处理工艺必须能够产生紫外线剂量 与140毫瓦每秒的紫外线剂量具有相同的杀菌效果 平方厘米(mWs/cm2),通过低压紫外线照射 波长为254纳米(nm)。同等的紫外线剂量必须以适当的速度提供 废水透过率为55%,在254 nm波长下测量。在里面 除了批准用于 加利福尼亚州的废水回收,其他技术,如- 压力 目前正在研制高强度、中压、高强度和脉冲紫外线系统 建议用于废水回收。两者之间存在显著差异 在这些技术中。低压系统是单色的,而 大多数辐射是在254 nm的杀菌波长下产生的。对于 中压系统,灯是多色的。自从杀菌剂 研究人员称,紫外线波长的有效性在200至300纳米范围内变化 中压紫外灯输出杀菌效率的估算 需要考虑每个波长的杀菌效果。 脉冲 在紫外线系统中,剂量估算还必须考虑 消毒脉冲频率。此外,灯的电弧也存在差异 使用的长度、功率输入、反应堆配置和剂量计算方法 紫外线系统制造商。确定技术和技术之间的差异 制造的系统需要开发一个测试协议 将这些技术与标准方法进行了比较。一项拟议的议定书已经生效 已经开发出来了。实验室和现场中压试验的结果, 高强度试验装置用于评估方案。 报告的结果 本文代表了拟议协议的首次现场测试。包括5个参考文献、表格、图表。
In California, any ultraviolet (UV) disinfection system used as a part of wastewater reclamation treatment process must be capable of producing a UV dose with the same germicidal effectiveness as a UV dose of 140 milliwatt seconds per square centimeter (mWs/cm2 ) obtained by the low-pressure, UV light with a wavelength of 254 nanometers (nm). The equivalent UV dose must be delivered at a wastewater transmittance of 55 percent, measured at the wavelength of 254 nm. In addition to the low-pressure low-intensity systems which are approved for wastewater reclamation in California, other technologies such as low-pressure high-intensity, medium-pressure high-intensity, and pulsed UV systems are being proposed for use in wastewater reclamation. There are significant differences among these technologies. The low-pressure systems are monochromatic, and the majority of emissions are produced at a germicidal wavelength of 254 nm. For medium-pressure systems, the lamps are polychromatic. Since the germicidal effectiveness of the UV wavelength varies in the range of 200 to 300 nm, the estimation of the germicidal efficiency of the medium-pressure UV lamp output requires factoring in the germicidal effectiveness of each wavelength. For pulsed UV systems, the dose estimation must also take into consideration the impact of pulse frequency on disinfection. In addition, there are differences in lamp arc length, power input, reactor configuration, and dose calculation methods used by UV system manufacturers. Establishing the differences among the technologies and manufactured systems required developing a test protocol that compared these technologies against a standard method. A proposed protocol has been developed. The results from laboratory and field tests of a medium-pressure, high-intensity pilot unit are used to assess the protocol. The results reported herein represent the first field test of the proposed protocol. Includes 5 references, tables, figures.
分类信息
发布单位或类别: 美国-美国给水工程协会
关联关系
研制信息
相似标准/计划/法规