Digital Dissolved Oxygen Sensor Probe for Aeration Tank

At present, most domestic sewage treatment uses active sludge removal method. Specific measures include inlet water flow, blasting air pressure, backflow optimization control, etc. Urban sewage discharge is large, and there are many demands for stability control of water quality and quantity, resulting in high frequency of changes in oxygen supply during the treatment of biochemical tanks. At present, it is relatively common to use aerobic microorganisms to treat industrial wastewater, and aerobic microorganisms must decompose organic matter into carbon dioxide, water, and nitrates under aerobic conditions. In the activated sludge process for treating industrial wastewater, the amount of dissolved oxygen (DO) is usually measured to appropriately adjust the oxygen of microorganisms. The Online Dissolved Oxygen Sensor OPD790 developed and produced by Daruifuno adopts the optical fluorescence quenching method, has a built-in digital interface, and supports the Modbus communication protocol. It can be used with the DUC2-DO single-parameter digital controller to realize continuous monitoring of dissolved oxygen in sewage plants or wastewater aeration tanks, and to control aeration equipment. Generally, industrial wastewater does not contain dissolved oxygen and is often aerated with the help of various aerators to supply oxygen to microorganisms. The role of dissolved oxygen not only provides the formation of activated sludge, but also provides the oxidation of cell materials themselves and the metabolism of microorganisms to oxidize and decompose organic matter. In the activated sludge method for treating industrial wastewater, the dissolved oxygen in the aeration zone is generally controlled at 2~4 mg/L. Dissolved oxygen that is too high or too low will affect the metabolism of microorganisms and reduce the water treatment effect.

Features
1. Digital Dissolved Oxygen Sensor, supports standard Modbus communication protocol
2. Protection grade IP68, can work stably and continuously underwater
3. Split joint, easy to use and install
4. Internal storage of calibration data, plug and play on site

Specification

In order to accurately control the dissolved oxygen environment in the aeration tank, it is necessary to have a full understanding of the dynamic balance of DO, which consists of two processes: one is the oxygen diffusion process, which in the blast aeration system is mainly reflected in the flow of air from the aeration After the aerator at the bottom of the pool is released, the oxygen in the air transfers from the gas phase to the liquid phase; the second is the oxygen consumption process, which includes various aspects of the aerobic treatment process, including organic carbon removal, biological denitrification, biological Phosphorus removal, etc., DO consumption is the result of the combined effects of the above processes. Since the quality and quantity of the incoming water to the sewage plant changes, its oxygen consumption also changes within a specific period of time. Only by balancing the oxygen supply and oxygen consumption within this period can the stability of the treatment environment be ensured. Ultimately ensuring the quality of effluent water. In the actual operation of the sewage plant, it is a very complicated project to achieve the dynamic balance of these two processes without causing energy waste.

Excessive dissolved oxygen (greater than 4 mg/L) will accelerate the consumption of organic matter in the sewage, causing microorganisms to age due to lack of nutrients and cause the aging of activated sludge and the proliferation of filamentous bacteria. Long-term high dissolved oxygen will reduce the flocculation performance and adsorption capacity of activated sludge. Too low dissolved oxygen will inhibit the life activities of microorganisms, leading to the decline, disintegration, and deterioration of microorganisms. It affects the respiration of microorganisms and the purification ability of activated sludge, causing sludge to float, decay and expand. Therefore, it is very important to use online dissolved oxygen sensors to continuously monitor the dissolved oxygen value of sewage and wastewater. Delfino company focuses on the R&D and production of water quality analysis instruments. Our measurement parameters include pH, ORP, conductivity, TDS, salinity, dissolved oxygen, COD, ammonia nitrogen, turbidity, chlorophyll, blue-green algae, residual chlorine, and chlorine dioxide. wait. In addition to ORP sensors, our main products include Ph Orp Analyzer, Conductivity Analyzer, Turbidity Analyzer, Cod Analyzer, Dissolved Oxygen Analyzer, ammonium analyzer, chlorine analyzer, etc.