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What are the types and application fields of reclaimed water reuse technology?
Release time:
2022-12-12 13:38
The purpose of reclaimed water reuse technology is to remove impurities from water through necessary water treatment methods to achieve the quality specifications of reclaimed water. Treatment methods should be determined based on reclaimed water quality requirements and water use objectives. In the treatment process of reclaimed water reuse, in addition to specific treatment functions, some methods usually directly or indirectly combine other treatment functions. Several methods are often used in combination to achieve a certain purpose.
The treatment of reclaimed water reuse usually includes three stages: pretreatment, main treatment, and advanced treatment. The pretreatment stage of reclaimed water reuse mainly includes two treatment units: screens and equalization tanks. The main functions are to remove solid impurities from wastewater and maintain uniform water quality. The main treatment stage of reclaimed water reuse is the key to reclaimed water reuse. The main function is to remove dissolved organic matter in wastewater. The advanced treatment stage is mainly disinfection treatment to ensure that wastewater meets the water quality standards of reclaimed water.
Reclaimed water reuse technology includes biological methods, physicochemical methods, and membrane separation methods. At the same time, the biological treatment method of reclaimed water treatment equipment utilizes the adsorption of microorganisms in water to oxidize and differentiate organic matter in wastewater, including aerobic and anaerobic microbial treatment. Usually, a combination of multiple processes is used.
Physicochemical treatment methods use a basic method combining coagulation sedimentation (flotation) technology and activated carbon adsorption to improve the effluent water quality of reclaimed water reuse, but the operating cost is higher. The membrane treatment technology of reclaimed water treatment equipment generally selects ultrafiltration (Microfilter) or reverse osmosis membrane treatment, which has the advantages of high SS removal rate and small land occupation.
Reclaimed water reuse technology is mainly used for toilet flushing, green spaces, tree trunk irrigation, road cleaning, flushing, infrastructure construction, fountains, and other uses that can withstand its water quality specifications. The water quality of reclaimed water reuse should meet the following requirements: it does not affect human health, does not affect environmental quality, does not affect product quality, and meets various usage standards.
Papermaking wastewater, chemical fiber wastewater, recycled water
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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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