Sampling time for completion acceptance of sewage treatment project

Generally, instruments are used for online monitoring, and the time for manual monitoring is relatively short. Generally speaking, monitoring mainly includes COD, BOD5, TP, TN, MLSS and ammonia nitrogen in and out of the water. Generally, the sampling time is one because the water is not stopped and the water is at the outlet. When the water comes out of the water tank, the sampling will start at 10-30 minutes, and the sludge concentration ratio when the water is aerated (because the aeration is 2 hours, it is generally sampled after 1 hour for 20 minutes).