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What is an ABR anaerobic tower?
Release time:
2022-12-12 13:38
The anaerobic tower is the core treatment unit for the treatment of medium and high concentration organic wastewater. ABR Anaerobic tower That is, the anaerobic baffle reactor, is a new third-generation anaerobic tower developed on the basis of the second-generation UASB anaerobic tower.
I. Introduction to ABR anaerobic tower
The ABR anaerobic tower is equipped with vertical baffles, which Anaerobic tower It is divided into several series of reaction chambers. Each reaction chamber is a relatively independent UASB system, in which sludge exists in the form of granules or flocs. The water flow is guided up and down by the baffle plates, passing through the sludge bed in each reaction chamber one by one. The substrate in the influent is fully mixed and contacted with the microorganisms to be degraded and removed.
II. Application fields of ABR anaerobic tower
ABR anaerobic towers are widely used in many industries, including low-concentration, high-concentration, high-solids-concentration wastewater, sulfate wastewater, bean product wastewater, grass pulp black liquor, citric acid wastewater, molasses wastewater, dyeing wastewater, livestock and poultry farming wastewater, pharmaceutical and chemical wastewater, etc.
ABR anaerobic treatment, due to its strong treatment capacity, is often used to treat high-concentration organic wastewater and is very important in the daily operation of wastewater systems. During the operation of the anaerobic tower, phenomena such as slow growth of granular sludge, insufficient gas production, and sludge leakage often occur. Today, we will talk about the causes and solutions of these abnormal phenomena.
1. Anaerobic tower Granular sludge growth is too slow
Reasons: Due to insufficient nutrients and trace elements; excessive influent pre-acidification; low sludge load; washing away sludge; granular sludge splitting.
Solutions: Increase the concentration of liquid nutrients and trace elements; reduce the degree of pre-acidification; increase the reactor load.
2. Reactor overload
Reasons: Due to insufficient sludge or insufficient methane-producing activity of sludge in the ABR anaerobic system.
Solutions: Increase sludge activity, sludge quantity, seed sludge quantity, or promote sludge growth; reduce sludge loss.
3. Insufficient methane-producing activity of sludge
Reasons: Insufficient nutrients and trace elements; excessive growth of acid-producing bacteria; accumulation of organic suspended solids in the reactor; decrease in the medium temperature of the reactor; toxic substances that control activity in wastewater or environmental conditions, and precipitation caused by inorganic substances such as calcium ions.
Solutions: Supplement nutrients and trace elements; increase the degree of pre-acidification of wastewater; reduce the reactor load; increase the temperature; reduce the concentration of suspended solids; reduce the concentration of calcium ions in the feed liquid; use a sedimentation tank before the ABR anaerobic system.
4. Washing away granular sludge
Reasons: Gas accumulates in empty granules, and large and empty granular sludge is easily formed under low temperature, low load, and low feed concentration; the granular structure is layered, and a large number of acid-producing bacteria cover the granular sludge, causing gas-producing bacteria to gather inside the granules;
Solutions: Increase sludge load; use more stable process conditions, increase the degree of pre-acidification of wastewater; pretreatment (sedimentation or chemical flocculation) is used to remove proteins and fats.
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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