The BOD meter is an instrument used to detect organic pollution in water bodies. BOD meters use the amount of oxygen consumed by organisms to break down organic matter to assess water quality.
The principle of the BOD meter is based on the process of decomposing organic pollutants in water by bacteria and consuming oxygen. First, a certain amount of sample is extracted from the water sample to be tested, and then the sample is added to a measurement bottle containing biological reagents, which contain cultures of bacteria or microorganisms that can break down organic pollutants and consume oxygen.
Next, the assay bottle containing the sample and biological reagents is sealed and placed at a specific temperature for incubation. During the cultivation process, organic pollutants are decomposed, accompanied by an increase in the amount of oxygen consumed. By measuring the remaining dissolved oxygen concentration in the bottle after the culture, the BOD value in the water sample can be calculated, which is used to evaluate the concentration of organic pollutants and water quality conditions in the water body.
It can be used to monitor the treatment effect of sewage treatment plants and evaluate the organic content in water bodies such as domestic sewage, industrial wastewater and agricultural drainage. By measuring the BOD value, we can judge the treatment effect of sewage and the degree of pollution of water bodies, and predict the biological oxygen consumption in the ecosystem. In addition, the instrument can also be used to monitor corrosive or toxic substances in water bodies, providing a reference for protecting water resources and the ecological environment.
The BOD meter has the advantages of easy use, fast measurement and high accuracy. Compared with other measurement methods, it is more direct, economical and reliable. However, there are some limitations in the use of this instrument, such as a long measurement time (usually 5-7 days, or 1-30 days), and high requirements for instrument maintenance and biological reagent management. In addition, since the determination process is based on biological reactions, the results are affected by environmental conditions and biological activity, and experimental conditions need to be strictly controlled.
To sum up, the BOD meter is an instrument used to measure organic pollutants in water. It evaluates the quality and degree of pollution of water by measuring the amount of oxygen consumed when organic matter in water samples decomposes. It plays an important role in water quality monitoring and environmental protection, and provides useful data and reference to support environmental management and water resources protection. With the advancement of science and technology, I believe that the performance and application fields of this instrument will continue to expand and improve.
The harm of excessive BOD is mainly manifested in the following aspects:
1. Consumption of dissolved oxygen in water: Excessive BOD content will accelerate the reproduction rate of aerobic bacteria and aerobic organisms, causing the oxygen in the water to be rapidly consumed, leading to the death of aquatic organisms.
2. Deterioration of water quality: The reproduction of a large number of oxygen-consuming microorganisms in the water body will consume dissolved oxygen and synthesize organic pollution into its own life components. This is the self-purification property of the water body. Excessive BOD will cause aerobic bacteria, aerobic protozoa, and aerobic native plants to multiply in large quantities, rapidly consuming oxygen, leading to the death of fish and shrimp, and the massive reproduction of anaerobic bacteria.
3. Affects the self-purification ability of the water body: The content of dissolved oxygen in the water body is closely related to the self-purification ability of the water body. The lower the dissolved oxygen content, the weaker the self-purification ability of the water body.
4. Produce odor: Excessive BOD content will cause the water body to produce odor, which not only affects the water quality, but also poses a threat to the surrounding environment and human health.
5. Cause red tides and algae blooms: Excessive BOD will lead to eutrophication of water bodies, causing red tides and algae blooms. These phenomena will destroy the balance of aquatic ecology and pose a threat to human health and drinking water.
Therefore, excessive BOD is a very important water quality pollution parameter, which can indirectly reflect the content of biodegradable organic matter in the water. If sewage with excessive BOD is discharged into natural water bodies such as rivers and oceans, it will not only cause the death of organisms in the water, but also cause chronic poisoning after being accumulated in the food chain and entering the human body, affecting the nervous system and damaging the function of the liver.
Lianhua’s BOD instrument is currently widely used in China and Southeast Asia to detect BOD in water. The instrument is simple to operate and uses less reagents, minimizing operating steps and secondary pollution. It is suitable for all walks of life, universities, and environmental monitoring companies. and government water pollution control projects.
Post time: Mar-08-2024
