Application of ozone in tap water
This project is being implemented through a franchise agreement. The water plant has a designed capacity of 30,000 m³/day and draws water from the Jian'an branch of the Yanling water pipeline at the No. 17 water diversion point of the South-to-North Water Diversion Project's Middle Route Main Canal. The water treatment plant utilizes the internationally advanced "ozone + ultrafiltration membrane" water treatment process, resulting in water quality far superior to conventional water plants and meeting drinking water standards.
1. Ozone Sterilization Principle
Ozone's Efficacy: It is a strong oxidizing agent with four major functions: sterilization, oxidation, decolorization, and deodorization.
Ozone Sterilization Features: It is broad-spectrum, highly effective, environmentally friendly, easy to operate, economical, stable, and has a long lifespan.
Advantages of Ozone: Ozone is a broad-spectrum, environmentally friendly, and safe strong oxidant with a disinfection capacity 600-3000 times greater than chlorine.
2. Applications of Ozone in Waterworks
1. Removal of Organic Pollutants
Tap water often contains various organic pollutants, such as benzene, phenol, toluene, and formaldehyde. These organic pollutants not only affect the taste and safety of water but also affect its chemical reactions and disinfection effectiveness. Ozone has a strong oxidizing ability, which can reduce these organic pollutants to harmless substances. In tap water treatment, ozone can be used as a strong oxidant to remove organic pollutants from water.
When tap water and ozone are combined, due to its strong oxidizing ability, ozone can directly oxidize organic matter in the water, converting it into carbon dioxide and water. This oxidation reaction is extremely rapid and efficient, rapidly degrading and removing organic pollutants in the water.
2. Improving the Redox Potential of Water
Redox potential is a particularly important parameter in tap water treatment. Redox potential refers to the concentration ratio of reducing agents to oxidizing agents in water. In tap water, a low redox potential often leads to undesirable properties, such as incomplete decomposition of organic pollutants and a greenish tint. Ozone can oxidize organic pollutants and other substances in water, increasing its redox potential and improving its properties.
3. Killing Bacteria in Water
Bacteria in water are one of the most important targets for removal during tap water treatment. If not removed, they can have a significant impact on human health. Ozone has strong bactericidal and sterilizing properties and can be used to disinfect tap water.
Ozone's sterilizing and sterilizing mechanism works by disrupting the cell membrane structure and DNA molecules in cells. When water flows through an ozone generator, ozone gas is injected into the water, where it comes into contact with bacteria, destroying their biological structure and preventing them from reproducing and surviving. This disinfection method is highly effective and can kill a wide range of bacteria in water.
4. Remove Odors from Water
Tap water may contain a variety of odors and odors, such as the unpleasant smell of chlorine. An ozone generator can remove these odors. Because ozone molecules are more active than chlorine molecules, ozone gas can oxidize odorous substances in the water and convert them into harmless substances, thereby removing odor.
3、Common Mixing Device Methods for Ozone Treatment in Waterworks
1. Ejector (water ejector): This is a commonly used air-water mixing device. It can be installed on the inlet pipe of the clean water tank. It directly uses the pressure within the inlet pipe to mix water and air before entering the clean water tank. Alternatively, a pipe can be connected from the main outlet pipe of the water pump to the ejector, where it mixes with ozone before entering the water tank, without passing through the inlet pipe.
2. Use a fixed spiral pipe mixer. Install it on the inlet pipe of the clean water tank. Ozone and water are mixed in the mixer before entering the clean water tank.
3. Use an ozone contact oxidation tower or contact oxidation tank. Water enters the contact tower or contact tank and is mixed with ozone before entering the clean water tank. This mixing method is more expensive, but the mixing effect is better. This method uses a tall tower to spray water from the top to create a mist. Ozone gas is then introduced from below, countercurrent to the water flow, ensuring thorough contact between the ozone gas and the water, creating ozone water.
Ozone dosage: The bactericidal effect of ozone depends primarily on the ozone content in the water, the degree of dispersion of the ozone gas in the water (i.e., whether it is evenly and thoroughly mixed), and the contact time between the ozone and the water.
