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Reclaimed water reuse: Three main methods of reclaimed water reuse technology
Release time:
2022-12-12 13:38
Recycled water reuse This involves treating domestic wastewater (or urban wastewater) or industrial wastewater using advanced technologies to remove various impurities, toxic and harmful substances, and certain heavy metal ions that pollute water bodies. Subsequently, disinfection and sterilization are performed, resulting in colorless, odorless, clear water that meets or exceeds national standards for miscellaneous water use (or relevant regulations). It is widely used in industrial production or residential life.
Three main methods for recycled water reuse technology treatment:
1. Physicochemical treatment method: Activated carbon adsorption is a physical method, and coagulation sedimentation technology is a chemical method. Combining these two methods achieves excellent water treatment results.
2. Membrane treatment method: Using reverse osmosis membranes or ultrafiltration membranes for treatment, suitable for situations with large water quality variations. The wastewater treatment effect of recycled water reuse technology equipment is excellent, and the widespread application of recycled water reuse technology is of great significance for environmental improvement.
3. Biological treatment method: Suitable for wastewater with high organic matter content. Generally, activated sludge method, contact oxidation method, biological rotating disc, etc., are used. These biological treatment methods can be used individually or in combination, such as contact oxidation + biofilter; biofilter + activated carbon adsorption; rotating disc + sand filtration, etc.
The uses of recycled water include industrial production, urban miscellaneous uses, agricultural irrigation, and water conservancy projects. The process flow includes:
(1) Pretreatment, usually consisting of screening, equalization tanks, sedimentation tanks, oil-water separators, and grit chambers. The main function is to pretreat the water sample to remove solid impurities and adjust water quality and quantity.
(2) Main treatment, using conventional wastewater treatment methods to remove the main pollutants in the wastewater.
(3) Post-treatment, mainly for deep treatment of the wastewater after the main treatment. Commonly used methods include coagulation treatment. The process flow of recycled water treatment is actually based on conventional wastewater treatment processes, using advanced treatment technologies to further improve the effluent water quality to meet recycled water standards.
Wastewater treatment engineering, industrial wastewater treatment, reclaimed water reuse
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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