Share one thing per day, let’s chat together

Thread Content

1. What is generally used to measure nitrite levels? Answer: Both nitrates and nitrites can be detected using spectrophotometry, but this method has certain issues regarding stability and accuracy. As a result, it is now largely replaced by ion chromatography. However, since wastewater treatment plants rarely have such large-scale instruments, spectrophotometry still holds a significant market share. Furthermore, the gas-phase molecular absorption method is also a good option; however, the cost of the equipment is similar to that of domestic ion chromatography, around 100,000 yuan, which is why it isn’t used very often. 2. What should be done if a large amount of oily wastewater suddenly enters an A/O process? Answer: Under normal circumstances, oil-based wastewater contains high levels of ammonia nitrogen and phenols; it is important to monitor changes in DO, and appropriate measures should be taken if any abnormalities occur. 3. What are the differences between the MSBR process and the A2/O process? How is it performing? Answer: The MSBR process operates relatively stably overall; it is similar to the A2/O process in operation. It requires less space, and the retention time determines the quality of the effluent. 4. How effective is the CAST process? Answer: CAST. However, from a technical perspective, it is difficult to achieve Class A standard for the quality of the effluent water. The denitrification and phosphorus removal efficiency of this process is lower than that of the A2/O process; therefore, when the total nitrogen level meets the requirements, phosphorus can be removed by adding chemicals to achieve water quality meeting Class A standard. 5. The total phosphorus content in the domestic wastewater treatment plant is 8 mg/L; what causes this? Answer: In this case, illegal discharge of industrial wastewater should be given priority consideration. 6. Where is the piling mud water normally discharged? Answer: It is not allowed to discharge it into the urban sewer system; it should be taken to a drying plant in the suburbs for drying. 7. How is the actual operation of the MBR? Compared to the traditional A2O process? Answer: In actual operation, MBRs have relatively high operating costs, require a large amount of air, and membrane fouling and lifespan are also significant issues. Additionally, their efficiency in removing recalcitrant dissolved organic substances is low ； The A2O process is relatively mature, offers good performance in removing pollutants, operates stably, and has a high capacity to handle shock loads.