Drying Technology
Keywords: activatedsludgesewagetreatment sewage treatment plants
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At present, environmental protection and pollution control have become important tasks for the sustainable and healthy development of society. Among the various contents of environmental protection, the sludge disposal of sewage treatment plants is a very important link. Sludge is an important resource that can be recycled and used. The scientific and effective treatment of sludge has a positive impact on the sustainable development of the ecological environment.
After sewage treatment, a large amount of sludge will remain. The types of substances contained in the sludge have diverse characteristics, including not only a large amount of organic substances, parasites, but also some substances of uncertain content, as well as toxic and polluting substances. material, the water in the sludge is also more. In general, the substances contained in the sludge include both recyclable resources and substances that will pollute the environment, and must be treated scientifically to protect the ecological environment and promote the improvement of resource utilization.
In recent years, my country has devoted a lot of energy to environmental protection, and has carried out the construction of sewage treatment plants in various regions. Nowadays, the construction of sewage treatment plants in most regions has gradually reached a mature level. Sewage treatment plants are responsible for the discharge of sewage in cities and towns, and purify the sewage to ensure that the discharged sewage will not pollute the environment. After the sewage treatment operation is completed, the sludge is the main material left over. Some sludges contain nitrogen, phosphorus, potassium and other chemical substances, which can be used as agricultural soil nutrients, and some sludges contain a large amount of salt components. Entering the soil will adversely affect the balance of its nutrient supply. Therefore, after the sewage treatment in the sewage treatment plant is completed, the component content of the remaining sludge needs to be clarified. In modern economic development activities, the utilization of water resources is very frequent, so a large amount of sewage and waste water will be produced. Water pollution is the top priority in ecological environment management. However, after sewage treatment, sludge higher than the sewage content will be produced. The problem of sludge treatment has not been paid attention to. The sludge contains available resources and pollutants, which is also the focus of resource utilization and environmental protection. By strengthening sludge disposal, the utilization rate of sludge resources can be improved, avoiding
The problem of environmental pollution is caused by unscientific disposal of sludge, which is also of great significance for the utilization of water resources and the improvement of the quality of sewage treatment.
The moisture content in the sludge is the highest. Although the application of the concentration technology can reduce the moisture, the amount of reduction is limited, and the use of the dehydration treatment technology can greatly reduce the moisture in the sludge. The sludge dewatering treatment technology can be combined with the concentration technology to concentrate the water in the pores of the particles, and then filter and dry it through dehydration treatment. The dehydration technology is mainly realized by the application of special mechanical equipment. Dehydration, centrifugal dehydration and filter press dehydration. The vacuum dewatering technology uses a vacuum drum filter, and the sludge is put into it, and the equipment will be subjected to vacuum compression treatment through the filter screen, and the water in the sludge will be discharged under the action of pressure. Centrifugal dewatering treatment technology uses centrifugal force to discharge the water in the sludge under the action of throwing force. The filter press dehydration treatment technology is to apply a large pressure to the sludge by using a filter press, and then discharge the water.
The sludge formed after wastewater treatment contains very rich and diverse substances. Among them, there are many nutritious substances. Some nutrients are also substances that animals need to survive. Nutrient substances can be separated by disposal technology, and then processed into Animal feed, used in the breeding and animal husbandry industry. For the metal substances in the sludge, its content can be reduced through disposal technology, and then put into the field of urban greening projects. Therefore, there are many ways to use sludge,
Sewage treatment plants need to carry out reasonable treatment and utilization planning according to the material content characteristics of sludge.
In the work of the sewage treatment plant, the sludge disposal work is very important. The sludge treatment plant must actively apply the treatment technology, choose the appropriate treatment plan, promote the improvement of the quality and efficiency of the sludge treatment, and increase the social benefits on the basis of protecting the environment. and economic benefits.
