To understand the instruments used for testing wastewater, one must first know the specific conditions of the water quality. Check exactly what parameters are present in the wastewater and then select the corresponding water quality testing equipment. For instance, online monitoring of medical wastewater, industrial wastewater monitoring, real-time monitoring of domestic sewage, etc. The detection instruments used in these different places will also vary! In this chapter, let’s take a look at several common devices used in wastewater testing together. There are COD online analyzers, total phosphorus and total nitrogen online analyzers, ammonia nitrogen online monitors, multi-parameter online analyzers, etc.

1.The COD online analyzer is used to detect the chemical oxygen demand in surface water, urban sewage and industrial wastewater. It is an essential device for monitoring the chemical oxygen demand in wastewater.

2.The ammonia nitrogen online analyzer can automatically and continuously operate for a long time without human supervision after being set on site. It is mainly used for sewage monitoring in some occasions such as wastewater discharge, sewage treatment plants, and surface water environmental quality. The corresponding treatment can be selected based on the on-site conditions to ensure the reliability and accuracy of the detection process, and it can also meet the on-site requirements of different sites.

3.The total phosphorus and total nitrogen online analyzer can achieve single detection of two parameters: total phosphorus and total nitrogen. It is mainly used for monitoring the quality of circulating cooling water and sewage discharge, etc.

4.Multi-parameter online analyzer. Multi-parameter, as the name suggests, means more than one parameter, such as real-time monitoring of multiple parameters in water, including COD, ammonia nitrogen, total phosphorus, total nitrogen, etc. So as to judge the specific situation of water quality.