Dissolved oxygen (DO) in papermaking wastewater refers to the content of dissolved oxygen in wastewater, and is usually used to evaluate the degree of biological oxidation reactions in wastewater and the health of biological communities in wastewater. The following are the steps to measure dissolved oxygen in papermaking wastewater:
SAMPLE COLLECTION: Take samples from the wastewater treatment system and collect the samples in glass or plastic bottles.
Sampling on-site analysis: On-site analysis is carried out within 1 hour after the sample is collected to ensure the accuracy of the measurement results.
Determination using a Dissolved Oxygen Meter: use a Dissolved Oxygen Meter to measure the dissolved oxygen content in the sample. There are usually two types of handheld Dissolved Oxygen Meters and desktop Dissolved Oxygen Meters.
Sample treatment before measurement: Before the measurement, the sample temperature needs to be close to the measurement temperature. Generally, it is enough to lower the sample temperature to room temperature. In addition, if there are air bubbles in the sample, it needs to be left for a period of time after sampling to let the air bubbles out.
Check the Dissolved Oxygen Meter: Before using the Dissolved Oxygen Meter, you need to check whether the device is working properly, such as whether there is enough calibration solution, etc.
Calibration: Calibrate the Dissolved Oxygen Meter with a standard calibration solution.
North and South Tide remind you: the content of dissolved oxygen will be affected by factors such as temperature, air pressure and salinity, so it needs to be corrected and calibrated accordingly when measuring. At the same time, in order to ensure the accuracy of the measurement results, it is necessary to strictly abide by the measurement methods and operating procedures.
