Water Iron Removal Theory and Technology
In the research and practice of iron removal, some people have detected the existence of iron bacteria in the iron removal filter, and found that organisms play a major role in iron removal process, and put forward the concept of biological iron removal. In the case of low iron content and low iron content, organisms were found to have a great role in iron removal process, and organisms were considered to be the main reason for iron removal. The presence of biological iron removal was also found at low dissolved oxygen levels.
The ferric ion generated by ferric ion oxidation is precipitated in water as Fe(OH)3 due to its minimal solubility in water. When the concentration of iron in the water is greater than 0.3 mg/l, the water becomes turbid, and over 1 mg At the time of l/l, the water has an iron smell. Especially when the water contains an excessive amount of iron, it can generate rust-colored spots when washing clothes. In the clean and sanitary appliances, even on the walls and floors that come into contact with water, yellow can be seen. Brown spots, long-term eating and drinking water containing iron and manganese can affect people's diet and cause diseases of the digestive system. Excessive iron is often contained in groundwater used in industrial and heating boilers. Due to the presence of iron and manganese, the ions can be softened. The exchange of resin causes iron poisoning; the exchange capacity of the exchanger is reduced, the salt consumption increases, and the softening efficiency decreases. Therefore, in the condition that the iron and manganese groundwater is used as the water source, the boiler must be de-ironed before the softening of the water. It is one of the measures to ensure the safe and economical operation of the boiler and the healthy life of the people. When removing oxygen from the sponge iron deaerator of the steam boiler water supply, there is still iron content in the water ≤ 0.2-0.5mg/L, and the pressure is also needed. Iron removes iron from water. It is desirable at this time Aeration towers and other equipment.
The research on removing iron and manganese from groundwater has a long history in China. In the early 60s of the last century, the natural manganese sand contact oxidation and iron removal technology was successfully tested in China. In the 1970s, the theory of contact oxidation and iron removal was established. In the early 1980s, the contact oxidation and manganese removal technology was developed and applied rapidly in production. Since the 1990s, scholars at home and abroad have put forward different views on the traditional mechanism of iron removal and manganese removal. It is believed that the biological action of iron bacteria in groundwater is the main reason for the removal of iron and manganese. The proposed theory of iron and manganese removal by biological organisms has brought many new theories to the iron and manganese removal process. The deepening of the understanding of these theories has important guiding significance for scientific research and production practice.