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UV Disinfection  System

  • TOC complete set of equipment

    TOC complete set of equipment

    What are organic micropollutants?

    Organic micro-pollutants, also known as trace pollutants (Trace Contaminants), are of various types and exist widely. Common organic pollutants mainly include linear aliphatic hydrocarbons, polycyclic aromatic hydrocarbons (PAH), polychlorinated biphenyls (PCB), organic pesticides (organophosphorus, organic nitrogen), metal organic compounds, etc. As of December 25, 2017, CAS has recorded over 134.55 million compounds, but only 387,671 compounds have been included in the control, which is less than 0.3%. Any compound and its remnants may evolve and iterate into organic micropollutants.

    土壤微污染物

    What are the characteristics of organic micropollutants

    1) Low environmental concentration As the name suggests, the concentration of organic micropollutants in the water environment is extremely low, usually <10-6g/L, and at the same time, the types are extremely diverse. As a result, the qualitative and quantitative analysis of specific organic micropollutants The detection work is difficult to carry out.
    2) Refractory to biodegradation Due to its stable chemical form and extremely low environmental concentration, it is difficult to effectively treat it using biodegradation methods
    3) Existing process lags Existing water/sewage treatment facilities have not been designed for non-pollutants, and conventional water treatment processes are not well suited, and most of them are eventually discharged into ultraviolet water bodies
    4) Persistent toxicity Some organic substances are highly toxic persistent organic pollutants or endocrine disrupting substances, which have carcinogenicity, reproductive toxicity, neurotoxicity, endocrine disrupting and other hazards, and have a direct threat to human health.
    5) “Three effects” Some organic substances are precursors of disinfection by-products, which can form a variety of halogenated organic compounds in the process of chlorination disinfection, and most substances in halogenated disinfection by-products have been confirmed to have “three effects”. effect, and thus endanger human health

    Processing Technology

    activated carbon adsorption
    Activated carbon is a porous substance with a large internal surface area composed of micropores. The removal of organic matter by activated carbon mainly relies on microporous adsorption. The removal rate of activated carbon to trihalomethanes produced by chlorination was 20-30%, and the concentration of trihalomethanes in water and the amount of activated carbon also affected the removal efficiency of trihalomethanes.
    Ozone oxidation
    Ozone can change the properties of pollutants by destroying the molecular structure of organic pollutants because of its strong oxidizing ability. The effect of ozone on trihalomethane precursors (THMFP) can be divided into two categories. When ozone oxidation is used alone, and the water is chlorinated again, the content of trihalomethanes increases instead of that before oxidation, but if the amount of ozone added can completely convert the organic matter into CO2 and H2O, the trihalomethanes after water chlorination can be avoided. The generation of methane, but this cannot be achieved in the actual water treatment process.
    photocatalytic oxidation
    Photocatalytic oxidation is a degradation method in which UV+H2O2/O3 is used in combination. Its outstanding feature is its strong oxidizing ability. The polluted water is irradiated by broadband ultraviolet rays to generate hydroxyl radicals with strong oxidizing ability (∙OH, redox potential 2.78V) to react with the micro-polluted organic matter in the water body to promote its oxidative degradation and decomposition. It is small molecule non-toxic H2O and CO2.

  • Preparation of semiconductor ultrapure water

    Preparation of semiconductor ultrapure water

    Introduction

    EX-TOC-UPW series products are aimed at the preparation of ultra-pure water in the microelectronics industry, using high-intensity ultraviolet light to decompose total organic carbon (TOC) in water, and the integrated product design is suitable for flexible installation requirements of clean room ultra-pure water production lines.

    EX-TOC-UPW series products are equipped with online monitoring system, which can feedback system running status, UV output dose and variable power adjustment in real time.

    EX-TOC-UPW product system components are standardized and can be replaced with similar international brands, which further reduces the overall cost and simplifies the operation and maintenance process.

    微电子流程图

    Technical principle

    EX-TOC-UPW uses a low-pressure high-intensity 185nm UV lamp as the UV light source. The high-intensity UV light promotes the free generation of hydroxyl groups in the water body, ionizes trace organic pollutants in the water body, and further removes them through the subsequent mixed bed process.

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  • TOC UltraPure

    TOC UltraPure

    The preparation of ultra-pure water in the semiconductor industry is difficult and the technical barriers are high. After the tap water for production has been subjected to front-end multi-stage filtration + UV disinfection + two-stage RO, most of the pollutants in the water have been removed, but some tiny particles still pass through the RO membrane. The tiny particles retained in this part of the water body affect the conductivity of the water body and need to be further removed.
    UV-TOC UV reactor, using 185nm high-output UV lamp, 185nm UV light is easily absorbed by water, producing ∙OH, ∙OH reacts rapidly with organic pollutants in water, and deeply oxidizes it to CO2 and H2O

  • Total Organic Carbon degradation

    Total Organic Carbon degradation

    There are generally two sources of TOC in the ultrapure water manufacturing system: TOC contained in the raw water and TOC generated by the manufacturing system itself. The raw water is generally tap water, and the TOC will fluctuate significantly due to changes in regions, seasons, climates, etc. The TOC is lower in areas with less pollution; the TOC will rise significantly in winter; the TOC will be better than the fine weather in the rainstorm season. The TOC value of raw water generally c...
  • UV-TOC Degradation Equipment

    UV-TOC Degradation Equipment

    Description Since the raw water of ultrapure water is usually tap water, there is no TOC standard for tap water stipulated by my country’s national standard. The requirements for TOC in Table 2 are at ppb level, so the treatment of TOC also requires multi-stage process treatment to meet the water quality requirements. ACF, UF, RO and EDI all have the ability to handle TOC. Usually after these front-end treatments, the TOC is reduced to about 10~30 ppb, and then through the TOC-UV l...
  • Water treatment ultraviolet germicidal lamp

    Water treatment ultraviolet germicidal lamp

    The working principle of water treatment ultraviolet germicidal lamp is that only artificial mercury (alloy) light source can output sufficient UVC intensity for engineering disinfection. The ultraviolet sterilization lamp is made of quartz glass. The mercury lamp is divided into low-pressure low-intensity mercury lamp, medium pressure high-intensity mercury lamp and low-pressure high-intensity mercury lamp according to the difference in the vapor pressure of mercury in the lamp and the output intensity of the ultraviolet lamp.

     

  • Ultraviolet disinfection of drinking water

    Ultraviolet disinfection of drinking water

    “Ultraviolet disinfection of drinking water” refers to a water treatment method that uses an UV mercury lamp as a light source, and the high-pressure mercury vapor in the ultraviolet lamp tube generates ultraviolet radiation with a predominant wave length of 253.7 nm when it is ionized by the applied pressure, so as to sterilize and disinfect drinking water.

  • Pipeline Ultraviolet Sterilizer

    Pipeline Ultraviolet Sterilizer

    Onyx ultraviolet sterilizer produces UVC irradiation water. When all kinds of bacteria, viruses, parasites, algae and other pathogens in water are exposed to a certain dose of UVC, the structure of DNA or RNA in their cells is destroyed, which makes them lose the ability of replication and reproduction. Because the life cycle of bacteria and viruses is generally very short, the bacteria and viruses that can not reproduce will die quickly, so the purpose of disinfection and purification without using any chemical drugs is achieved. On the strength of the special L-shaped structure and optimized diversion design of the cavity, combined with the automatic cleaning structure of full intelligent control, it can ensure the sterilization effect accurately for a long time, realize unattended operation and save energy consumption. In addition, a comprehensive product upgrade has been carried out in the field of secondary water supply.

  • Ultraviolet Disinfection of Food and Beverage

    Ultraviolet Disinfection of Food and Beverage

    In recent years, with the gradual enhancement of people’s safety awareness, the product quality requirements of food and beverage industry are more stringent. Microorganisms in water can affect the color, smell, taste and shelf life of bottled water, packaged drinking water and various beverages. Therefore, in the whole process of food and beverage processing, effective microbial disinfection is essential.

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