In the process of water quality treatment, most microorganisms have been removed, but even if microfiltration, ultrafiltration, and other methods are used to treat water, not all bacteria in the water can be completely removed.
I. Process DesignIn the process of water quality treatment, most microorganisms have been removed, but even if microfiltration, ultrafiltration, and other methods are used to treat water, not all bacteria in the water can be completely removed. Moreover, ordinary water treatment methods cannot eliminate all microorganisms. To ensure that products are qualified within the shelf life and ensure the health of consumers, when manufacturing beverages, especially carbonated drinks, mineral water, purified water, and fruit juice drinks that are no longer subject to secondary sterilization after packaging, water must be disinfected, and attention should be paid to the sanitary status of storage tanks, pipelines, valves, etc., to prevent secondary pollution to the water.
Raw water → Raw water booster pump → Multi-media filter → Active carbon filter → Ion exchanger → Security filter → Multi-stage high-pressure pump → RO reverse osmosis system → Ozone disinfection and sterilization → Pure water tank → Fully automatic barrel/bottle water filling production line → Packaging → StorageII. Principle of Ozone Emission Strength on Disinfection and SterilizationThe concentration of ozone in water is directly related to the killing rate of bacteria. The threshold of ozone disinfection and sterilization in water involves the residual ozone concentration after oxygenating organic matter, microbial organisms, and other oxidizable substances in the water. Generally, after adding ozone to the water, the concentration detected 10-30 minutes later can be considered as the residual ozone concentration.
To summarize, generally speaking, after passing through hollow fiber ultrafiltration, reverse osmosis membrane filtration of clean water, the residual ozone concentration reaches 0.3-0.6 mg/L, and coliform bacteria, bacterial flora, and total bacteria can all reach zero indicators. As long as prevent secondary re-contamination (such as contamination of bottles and lids), microbial indicators will not be a big problem. However, it is more difficult to kill fungal spores and algae spores. It takes 0.8-1 mg/L to kill them.
Moreover, ozone has strong adaptability and little influence on temperature and pH value. Ozone has a wide adaptability range and is not limited by bacterial species. Its disinfection effect is better than that of chlorine disinfection. Unlike chlorine, residual ozone can decompose itself into oxygen without secondary pollution. The water treated by ozone has no color or odor and good taste, which can improve the quality of drinking water.
Therefore, in order to improve the quality and extend the shelf life of bottled drinking water, the International Bottled Water Association (IBWA) recommends using ozone treatment. Before ozone treatment, bottled water usually uses reverse osmosis, nanofiltration, and ultrafiltration to remove 99% of organic matter from natural water, reducing the amount of ozone used.
Chlorine is also a commonly used disinfection agent, but it has secondary pollution, and its disinfection is affected by temperature and pH value. Residual chlorine can also affect the taste of drinking water. Especially for beverage water, residual chlorine can make carbonated beverages such as carbonated drinks produce a smell of chlorine, and affect the product color, affecting product quality.
III. How to Sterilize Pure Water/Mineral WaterThere are two main ways to sterilize pure water/mineral water: ultraviolet sterilization and ozone sterilization. Due to its weak sterilization strength and lack of hysteresis sterilization effect, ultraviolet sterilization is gradually being reduced by manufacturers in this industry. More and more manufacturers are choosing to use ozone sterilization.
The principle of ozone sterilization is that ozone reacts with oxygen in water under oxidative reduction reaction to produce highly oxidizing single oxygen atoms (O) and hydroxide (OH). These radicals instantly decompose organic substances, bacteria, and microorganisms in water. Hydroxyl (OH) is a strong oxidant and catalyst, which can cause chain reactions among organic matter, bacteria, and microorganisms. Hydroxyl (OH) has a very strong killing effect on various pathogenic microorganisms, such as viruses and spores. It has a powerful killing effect on stubborn microorganisms such as viruses and spores.
IV. Installation and Operation of Ozone GeneratorThe ozone generator is generally installed using jet addition method, that is, all or part of the water flow is mixed with ozone through a jet injector before entering the contact reaction tank. Connecting the waterway and gasway. Keeping the ozone generator intake open to the atmosphere. Turn on the water pump. Regulate the water inlet valve, turn on the gas volume switch to the maximum position。 Regulate the water ejector bypass valve。 Connect the gas cylinder pressure relief valve。 Connect the power cord。 Press the power switch。 Adjust the power adjustment switch to the maximum position。
The ozone generator system includes:CH-Y all-in-one ozone generator (built-in oxygen producer)
Venturi injection device
Check valve
Backflow preventer
Tail gas decomposition unit
