化工污水处理厂氨氮含量在线检测仪的选型

Type Selection of Ammonia and Nitrogen Content Online Detector in a Chemical Wastewater Treatment Plant

针对某化工污水处理厂废水中组分复杂,存在能与氨氮测定所用显色剂作用形成络合反应和其他反应的物质,测定结果不能完全反映废水中氨氮含量的问题,采用5种方法对化工污水处理厂的进水、中间废水和达标排放的废水进行氨氮含量检测的比对。结果表明,进水、中间废水和达标排放的废水分别应选用按HJ 535-2009纳氏试剂分光光度法设计的在线检测仪法、在线氨气敏电极法和在线氨气敏电极法(或水杨酸法在线检测仪)检测仪。

Aiming at the problem that the components of wasterwater in a chemical wasterwater treatment plant was complex,and there were matters that could make complex reaction or other reaction with color reagent using in determination of ammonia and nitrogen in the wasterwater,so the determination results could not fully reflect the ammonia and nitrogen content in the wastewater.Adopted five kinds methods to contrast the ammonia and nitrogen content detection for inflow wastewater,intermediate wastewater and wastewater which reach the discharged standard.Results showed that inflow wastewater,intermediate wastewater and wastewater which reach the discharged standard could select online detector method,online ammonia sensitive electrode method and online ammonia sensitive electrode method(or salicylic acid method online detector)detector designed by HJ 535─2009 nessler′s reagents spectrophoto meter respectively.