Dissolved Oxygen in Sewage Treatment: Importance and the Highlights of FT-ZS8

What is the role of dissolved oxygen (DO) in sewage treatment? It is directly related to the self-purification ability of water bodies and the efficiency of sewage treatment.

Dissolved oxygen is a necessary condition for the survival of animals, plants and microorganisms in water. The amount of dissolved oxygen is an indicator to measure the self-purification ability of water bodies. Under natural conditions, the oxygen content in the air does not change much, and water temperature becomes the main factor affecting the dissolved oxygen content. The lower the water temperature, the higher the dissolved oxygen content in the water.

Most of the biological treatment processes in sewage treatment adopt the combined anaerobic and aerobic treatment processes. Among them, the dissolved oxygen in the anaerobic tank must be controlled below 0.2mg/L, that in the anoxic tank is generally controlled at about 0.5mg/L, and that in the aerobic tank needs to be controlled above 2mg/L. If the concentration of dissolved oxygen is inappropriate or fluctuates too much, it will quickly cause the activated sludge system to be impacted and affect the treatment efficiency.

High dissolved oxygen is beneficial to the degradation of most organic pollutants in water bodies, enabling the water bodies to be purified quickly; conversely, low dissolved oxygen leads to slow degradation of pollutants in water bodies.

In the activated sludge process, when the sludge concentration and load are relatively high, the demand for dissolved oxygen is also relatively high, but it also needs to be controlled within a reasonable range to prevent the aging of activated sludge, which is not conducive to the treatment effect.

Dissolved oxygen is also an important medium for the degradation and detection of BOD. The consumption of dissolved oxygen can be used to detect the BOD content in sewage, which is crucial for evaluating the sewage treatment effect and adjusting the treatment process.

Therefore, the control and management of dissolved oxygen is very important in sewage treatment and is a key factor in ensuring the sewage treatment effect and the health of water bodies.

FT-ZS8 is an online Dissolved Oxygen Meter launched by Fengtu. It has multiple advantages.

High reliability: Specially designed for long-term field working environments, it has strong anti-interference ability and can resist the influence of various complex environmental factors, such as temperature changes and electromagnetic interference. It always maintains stable measurement performance, provides users with accurate and reliable dissolved oxygen data, and effectively avoids decision-making errors caused by data errors.

Flexible and portable: The probe adopts a free combination design, and each probe can be replaced independently and used plug and play. This unique design enables users to flexibly match different probes according to actual application scenarios and specific requirements, easily realizing personalized configuration and function expansion of the device. Moreover, during equipment maintenance and upgrading, there is no need for complicated operations and high-cost investments. Only the corresponding probes need to be replaced, which greatly improves the convenience and economy of equipment use.

Expandability: It has expansion functions. In addition to accurately measuring the dissolved oxygen concentration, it can also be freely combined with sensors for multiple water quality parameters such as pH value, electrical conductivity, turbidity, temperature, and ammonia nitrogen to achieve synchronous monitoring of multiple water parameters. This feature enables users to obtain comprehensive water quality information on the same device, eliminating the need to use multiple single-function monitoring devices. It not only saves equipment procurement and installation costs but also improves monitoring efficiency and the ability to analyze data correlation, providing strong support for in-depth understanding of water quality conditions.