水厂出水加氯消毒的加氯量确定  

Determination of Chlorine Dosage during Chlorination of Finished Water from Waterworks

作　　者：魏彬[1,2] 李君[1,3] 崔营[1] 孙伟利[1] 张永刚[1,2] 

机构地区：[1]天津创业环保集团股份有限公司,天津300381 [2]南开大学环境科学与工程学院,天津300072 [3]天津理工大学自动化学院,天津300384

出　　处：《中国给水排水》2010年第2期86-88,92,共4页China Water & Wastewater

摘　　要：加氯对控制水厂出水中有害菌群的数量有着至关重要的作用,合理的加氯量对控制水厂出水的菌群含量和水厂成本都有重要的意义。因次氯酸的氧化性强,还可以与水中的一些还原性物质发生反应,因此为了保证一定的余氯,还需要测定还原性物质的耗氯量。一般的还原性物质直接将次氯酸还原为氯化物,而氨氮和次氯酸的反应较特殊,对加氯量的影响也最大。在测定余氯时,采用DPD分光光度法,在测定过程中对国标法做了一些改进,取得了很好的效果。Chlorination has a crucial role in the control of the amount of harmful bacteria in finished water from waterworks, and a reasonable chlorine dosage is important to control the bacteria content and production cost. Because hypochlorous acid has strong oxidizing nature and reacts with reducing substances in water, the amount of chlorine consumption by reducing substances need to be determined to ensure some residual chlorine. General reducing substances directly reduce hypochlorous acid to chloride, and the reaction between ammonia nitrogen and hypochlorous acid is more special, which has a significant effect on chlorine dosage. In the determination of residual chlorine, the national standard method was improved using DPD spectrophotometry, and good results were achieved.

关 键 词：余氯 需氯量 DPD分光光度法 氨氮 折点加氯 

分 类 号：TU991.2[建筑科学—市政工程]