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How does an anaerobic tower work?
Release time:
2022-12-12 13:38
Anaerobic Tower It actually consists of an anaerobic filter (AF) and an upflow anaerobic sludge blanket reactor (UASB), so it is also called a UBF reactor. The anaerobic tower composite bed reactor has a sludge floating layer at the bottom and a packing material at the top.
It can be considered as moderately reducing the thickness of the anaerobic filter packing layer, leaving the necessary space between the water distribution system and the packing layer to facilitate the growth and accumulation of floating granular sludge, thus forming a UASB process. When wastewater floats correspondingly on the sludge layer and packing layer, organic compounds will contact and be decomposed by microorganisms on the particles of the sludge layer and the biofilm of the packing material.
Anaerobic Tower Wastewater, after pH and temperature adjustment, is pushed into the mixing zone at the bottom of the reactor, fully mixed with the mud-water solution returned from the external circulation system, and then enters the granular sludge expansion bed area for COD biochemical dissolution. The COD volumetric load here is very high, and most of the leaked COD is dissolved here, producing a large amount of biogas. Because of the fluctuation work done on the liquid during the entire process of biogas bubble generation, the gas effect is promoted, promoting the upward movement of the mixture of biogas, sludge, and water. After the solution is dissolved in the packing area, it enters the three-phase separator at the top of the reactor, the biogas is separated from the mud and water, and the output solution system software.
Anaerobic Tower The mixed water descends along the baffle to the mixing zone at the bottom of the reactor. After the water is fully mixed, it enters the sludge expansion bed area again, forming an internal circulation. According to different leaked COD loads and different reactor structures, the total return flow rate of the external circulation system reaches 0.5-10 times the inflow and outflow rate. Except for the part of the wastewater treated by the sludge bed, the other wastewater rises again, and the anaerobic tower and wastewater enter the packing area for the entire process of remaining COD dissolution and biogas production, improving and ensuring the water body with water output. Since most of the COD has been dissolved, the COD load in the packing area is low, and the gas production and gas supply are also small. The biogas produced here is collected by the three-phase separator, and the system software solves according to the output of the gas collector. After the wastewater treated in the packing area is treated by the three-phase separator, the supernatant is discharged through the effluent area, and the granular sludge returns to the sludge bed.
Anaerobic tower
Practical application of IC tower in food processing wastewater treatment
Wastewater from the food processing industry contains a large amount of organic matter, suspended solids, and oils. Traditional treatment methods often face problems such as high energy consumption and long processing cycles. The IC tower (internal circulation anaerobic reactor), with its unique internal circulation structure and three-phase separation system, demonstrates technical adaptability in treating high-concentration organic wastewater. The core advantage of the IC tower lies in its internal circulation mechanism. Through the fluid movement of the internal rising and falling pipes, it achieves thorough mixing of sludge and wastewater, improving biodegradation efficiency. In food wastewater treatment, the IC tower can adapt to influent conditions with a wide range of COD concentrations, especially suitable for the dairy, meat processing, and brewing industries. Practice has shown that when treating oily wastewater, the IC tower can stably achieve a COD removal rate that meets emission standards by reasonably controlling the hydraulic retention time and organic load. In an actual engineering case, a large seasoning production enterprise used the IC tower as a pretreatment unit. The influent COD concentration ranged from 8000-12000mg/L, and after treatment by the IC tower, it was reduced to below 1500mg/L, significantly reducing the burden on the subsequent aerobic treatment unit. The operating data shows that the biogas yield of the IC tower is stable and can be used for energy recovery, further reducing treatment costs.
The effectiveness of IC tower in treating high-concentration organic wastewater
The IC tower (internal circulation anaerobic reactor) is an important piece of equipment in modern wastewater treatment, demonstrating significant technical characteristics in treating high-concentration organic wastewater. Its unique internal circulation system enhances the contact efficiency between sludge and wastewater, making the organic matter degradation process more thorough and showing clear adaptability in treating industrial wastewater with a COD concentration exceeding 3000 mg/L. The treatment effect of this technology is mainly reflected in two dimensions: organic matter removal rate and biogas production. Actual operating data shows that in wastewater treatment for industries such as brewing and food processing, the IC tower usually maintains a high COD removal rate. The granular sludge formed inside the reactor has good settling performance, ensuring the stability of system operation. When the temperature is controlled around 35℃, the microbial activity reaches an optimal state, and the treatment effect is relatively ideal. In the process of treating high-concentration organic wastewater, the volumetric loading capacity of the IC tower is a key indicator that distinguishes it from traditional anaerobic processes. Due to its multi-stage reaction zone design and internal circulation flow pattern, the equipment can withstand high organic load shocks. Pharmaceutical wastewater treatment cases show that the system can still maintain stable operation when the influent COD fluctuates between 5000-8000 mg/L.
In the back-end process of semiconductor manufacturing, the IC handler (integrated circuit testing and sorting equipment) plays a core role in verifying chip functions and screening for quality. Its working principle is to use a precision robotic arm to send wafers or packaged chips to the testing station, and use the probe card and tester to complete the electrical parameter measurement. Then, according to the test results, it automatically sorts out qualified products and defective products. This integrated "test-judgment-sorting" process makes it a decisive link in the quality control before the chip leaves the factory. From a technical perspective, the gatekeeping role of the IC handler is reflected in three dimensions: First, the contact testing scheme can simulate the actual working state of the chip and detect physical defects such as open circuits, short circuits, and leakage; second, the multi-station parallel testing architecture achieves the screening capacity of thousands of chips per unit time, matching the production capacity needs of the packaging and testing factory; more importantly, its test data is directly related to the yield statistics of the chip, providing key evidence for process improvement. Current mainstream equipment supports environmental temperature testing from -40℃ to 150℃, covering the reliability verification needs of different application scenarios such as consumer electronics and automotive electronics. In industrial practice, the testing standards of IC handlers are often more stringent than the terminal application conditions. Taking the case of a major packaging and testing factory as an example
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