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English: Dissolved oxygen sensor in a sewer treatment plant. The sensor continuously monitor the dissolved oxygen level. The sensor continuously monitor the dissolved oxygen level. It is used as a feedback loop to control the blowers in an aeration system.
Dissolved oxygen concentrations may be measured directly in wastewater, but the amount of oxygen potentially required by other chemicals in the wastewater is termed as oxygen demand. Dissolved or suspended oxidizable organic material in wastewater will be used as a food source.
BOD test bottles at the laboratory of a wastewater treatment plant. Biochemical oxygen demand (also known as BOD or biological oxygen demand) is an analytical parameter representing the amount of dissolved oxygen (DO) consumed by aerobic bacteria growing on the organic material present in a water sample at a specific temperature over a specific time period.
BOD Bottle BOD test bottles at the laboratory of a wastewater treatment plant. BOD Bottle or an incubation bottle is a main apparatus used for the Biological Oxygen Demand (BOD) test. During the five-day BOD or BOD5 test process, the BOD bottle is used for incubating diluted samples under the 20 °C or 68 °F of temperature.
They produced their first environmental monitoring instrument, a dissolved oxygen sensor, in 1992. They then developed instrumentation for conductivity measurement of ultrapure water in 1996, and the first accurate commercial fiber-optic based CO 2 measurement system, in 1998.
Many governments impose strict regulations regarding the maximum chemical oxygen demand allowed in wastewater before it can be returned to the environment. For example, in Switzerland , a maximum oxygen demand between 200 and 1000 mg/L must be reached before wastewater or industrial water can be returned to the environment [2] .
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