同时在线测量污水中的硫化物和硝酸盐以优化硝酸盐投加量。
Simultaneous online measurement of sulfide and nitrate in sewers for nitrate dosage optimisation.
机构信息
Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Australia.
出版信息
Water Sci Technol. 2010;61(3):651-8. doi: 10.2166/wst.2010.901.
A new method for the simultaneous online measurement of sulfide and nitrate in wastewater is developed. A UV-VIS spectrometer was used. The sensor was calibrated by means of simultaneous online and offline measurements of sulfide and nitrate in batch tests carried out on a laboratory-scale sewer system. The developed calibration algorithm was successfully validated for both sulfide and nitrate measurement, with confidence limits of 2.7 mg S/L for total dissolved sulfide, and 7.5 mg N/L for nitrate. The online measurement of sulfide and nitrate enabled detailed evaluation of seven nitrate dosing strategies in the laboratory-scale sewer system, providing strong support to process optimisation. The dosage optimisation revealed that nitrate should be added at a location close to the point of sulfide control rather than at the beginning of a rising main, at a rate proportional to the expected hydraulic retention time (HRT) of the wastewater in the sewer section between the point of nitrate addition and the point where sulfide control is desired.
开发了一种用于同时在线测量废水中硫化物和硝酸盐的新方法。使用了 UV-VIS 分光光度计。通过在实验室规模的下水道系统上进行的批处理测试中的硫化物和硝酸盐的同时在线和离线测量对传感器进行了校准。为硫化物和硝酸盐的测量开发的校准算法均成功验证，总溶解硫化物的置信限为 2.7 mg S/L，硝酸盐为 7.5 mg N/L。硫化物和硝酸盐的在线测量使我们能够在实验室规模的下水道系统中详细评估七种硝酸盐投加策略，为工艺优化提供了有力支持。剂量优化表明，应该在接近硫化物控制点的位置添加硝酸盐，而不是在上升总管的起点，添加的速率应与硝酸盐添加点和希望进行硫化物控制的下水道段之间的预期水力停留时间（HRT）成比例。
Zotero 插件