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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.

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.

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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 adju...

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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

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EX-U UV disinfection equipment

The removal method of particulate matter in the manufacture of ultrapure water is generally filtration removal or adsorption removal, and the process required for different sizes of particulate matter is also different. In the traditional pure water manufacturing process, the treatment of particulate matter is generally multi-media filter (MMF) + activated carbon filter (ACF). The degree of nano-particles, and many semiconductor companies currently require the number of micro-particles (less ...

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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...

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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...

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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.

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MicroOzone 120g/H

Description Micro series miniaturized ozone generators are small in size and moderate in weight, and can be placed flexibly according to requirements; the fan adopts axial design, which has better air passage, which can effectively reduce the output attenuation of the system due to heating; the operating environment is loose; Low power and low power consumption. Micro series ozone generators have excellent product performance of ultra-high concentration, ultra-wide output range, ultra-lo...

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400g Ozone generator

Description Ozone generator is a special equipment that produces ozone by ionizing oxygen to produce electrochemical reaction through high voltage discharge technology. The oxidizing power of ozone is second only to that of fluorine, and it can react with many inorganic and organic substances. It has high killing rate and fast speed for bacteria, viruses and other microorganisms, and completely removes pollutants such as organic compounds without secondary pollution. It is an “idea...

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