Recently, the magnetic Fenton advanced oxidation process of the Guang'an Xinqiao Chemical Park sewage treatment project provided by Geemblue has a stable effluent COD of less than 30mg/L and a stable effluent total phosphorus of less than 0.3mg/L , and passed the acceptance with high standards. 1. Project Overview Project Name Guang'an Xinqiao Chemical Park Wastewater Treatment Project Phase II Processing scale 20,000 m3/day, with a total investment of 223 million RMB and an area of about 70 acres Core Technology Pretreatment → hydrolysis and acidification → integrated biological pool → magnetic Fenton system →V-type filter basin → activated carbon filter basin→ disinfection and discharge Emission standards "Pollutant Discharge Standard for Urban Sewage Treatment Plants" Level A standard, (COD ≤ 50 mg/L, TP ≤ 0.5 mg/L) Operating Unit Beijing Enterprises Water Group 2. The wastewater in the park is mainly organophosphorus pesticide wastewater, which is difficult to treat The wastewater in the park is mainly organophosphorus pesticide wastewater (accounting for 90%), and the main polluting enterprises is the two Chemical industries. Due to the different pretreatment processes of the enterprises, the total phosphorus structure of the two wastewaters is also different. enterprise Waste water characteristics Pretreatment process Chemical industry 1 The proportion of total phosphorus and organic phosphorus is relatively high, and the water quality fluctuates greatly Conventional pretreatment: anaerobic + aerobic + AO Chemical industry 2 The proportion of total phosphorus and organic phosphorus is relatively low, making treatment difficult Ozone pretreatment + anaerobic + aerobic + ultrafiltration + nanofiltration With the increase in the amount of high-phosphorus wastewater, the original sewage treatment system can stably meet the discharge requirements for COD, BOD, NH3-N, and TN, but the pressure to meet the effluent standards for total phosphorus is gradually increasing. The main reason is that most of the total phosphorus is organic phosphorus, and the original process system cannot effectively convert organic phosphorus. Therefore, new chemical phosphorus removal measures are needed. 3. Technical demonstration of phosphorus removal process The sewage treatment plant and its technical unit jointly carried out an on-site pilot test to systematically evaluate the phosphorus removal efficiency of activated carbon adsorption, ozone and Fenton. Technical route TP removal effect Core conclusion Activated carbon ↓ of activated carbon alone is not obvious, while that of activated carbon + flocculant is more obvious, but still does not meet the effluent standard. Activated carbon has poor direct adsorption capacity for organic phosphorus, and TP removal mainly relies on flocculation and sedimentation, which cannot achieve deep phosphorus removal. ozone Chemical industry 1 Wastewater TP ↓ <40%; Chemical industry 2 wastewater TP ↓ <20%; Ozone can oxidiz...

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The significance and role of ultraviolet disinfection in water treatment With economic development and improved living standards, the government and the public are increasingly prioritizing drinking water safety. my country's drinking water quality standards have undergone several revisions in recent years. The latest "Standard for Drinking Water Quality" (GB 5749-2022) sets higher safety requirements for drinking water quality, particularly regarding disinfection byproducts and upper limits for residual chlorine, which pose certain challenges to traditional chlorine disinfection processes. Consequently, cities such as Shanghai, Shenzhen, Suzhou, and Fuzhou have also established more stringent targets or local standards for high-quality or premium drinking water. Ultraviolet disinfection, as a physical disinfection method, has become an important option for improving water supply safety under these new conditions due to its broad-spectrum bactericidal properties, the absence of chemical agents, and the generation of no disinfection byproducts.   Chlorine-resistant microorganisms may exist in drinking water. In addition to well-known chlorine-resistant microorganisms such as Giardia lamblia and Cryptosporidium, studies have shown that chlorine-resistant microorganisms such as Sphingomonas, Pseudomonas, Cereus, Acinetobacter haemolyticus, Bacillus fuscae, Bacillus alvei, Legionella, and Thiophages are commonly found in the outlet water and water supply networks of Chinese water plants. Some of these chlorine-resistant microorganisms are opportunistic pathogens. Effectively inactivating these chlorine-resistant microorganisms requires a significant increase in the CT value of chlorine, making chlorine disinfection uneconomical or even impossible to implement, and significantly increasing the risk of excessive disinfection byproducts. Strictly speaking, the traditional single-unit chlorine disinfection model presents a safety vulnerability. Once a chlorine disinfection unit fails, the water plant's microbial safety barrier is completely lost. Therefore, from the perspectives of biological and chemical safety, a multi-barrier disinfection strategy and concept is essential for improving water supply safety. This concept has now been widely accepted and practiced in urban water plants in North America and the European Union. Ultraviolet disinfection has become an indispensable and even a key part of the combined disinfection method because it can meet both biological and chemical safety requirements.   Current Application of Ultraviolet Disinfection in my country's Water Treatment In recent years, the multi-barrier disinfection concept and ultraviolet disinfection technology have gradually gained recognition and promotion in my country's water supply sector, with initial application in urban water plants. According to incomplete statistics, over 60 large-scale water plants in China currently employ ultraviolet disinfection processes, with a tr...

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Purevita Ozone Generator Core technology   1. Self-Healing Double-Gap Borosilicate Dielectric Generator   1.1.Core material is 316L, and the main body of the generator chamber is constructed entirely of stainless steel no less than 304 stainless steel. 1.2. High voltage resistance, with a breakdown voltage 10 times the operating voltage, for high reliability. 1.3. Double-layer discharge gap, doubling the discharge area. 1.4. Compact structure significantly reduces footprint. 1.5. All materials are inert, protecting against acidic attack. 1.6. Industrialized production, excellent uniformity, and high ozone concentration.     2. DSP Medium- and High-Frequency IGBT Power Supply   2.1. Designed for ozone capacitive loads, high efficiency. 2.2. Infineon IGBT modules. 2.3. Sine wave output, low harmonics, minimal interference, and low losses. 2.4. Modular design, compact size. 2.5. Optimized PWM control technology and electromagnetic compatibility. 2.6. IGBT control module, comprehensive protection functions. 2.7. Real-time load monitoring, automatic frequency tracking, power factor ≥ 0.95. 2.8. Soft start/stop function.  2.9. Dozens of temperature, voltage, and current pass-through protections ensure stability. 2.10. Sealed structure significantly improves moisture and dust resistance. 2.11. Fully air-cooled power supply with independent air duct design for excellent heat dissipation.   3. Dedicated Transformer 3.1. H-class insulation prevents breakdown. 3.2. Vacuum impregnation technology protects the transformer from moisture. 3.3. Perfect design and processing technology improve inter-turn insulation, primary-secondary insulation, and insulation to ground. 3.4. Special design improves leakage inductance, and through LC series resonance technology, increases load power factor, improves energy utilization, and reduces heat generation. 3.5. Exquisite appearance and compact size facilitate control cabinet design. 3.6. Comprehensive temperature monitoring and excellent heat dissipation design ensure stable transformer operation.   4. Ozone Control System 4.1. Siemens, ABB, and Schneider brands guarantee stability. 4.2. Multiple temperature, pressure, flow, and power monitoring and protection features. 4.3. Detailed graphics and process simulation.  4.4. User level classification meets enterprise management requirements. 4.5. Data upload, recording, IoT, and wireless connectivity are utilized. 4.6. Automatic PID feedback, constant concentration, and other control functions reduce energy consumption and lower costs while meeting customer needs.

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