Application of shelf heating Freeze Dryer in environmental protection soil lyophilization

Application of shelf heating Freeze Dryer in environmental protection soil lyophilization
The application of shelf heating Freeze Dryer in environmental protection soil lyophilization, with the continuous development of society and economy, but the environmental pollution problem is becoming more and more serious. According to the 2017 National Survey of Soil Pollution Situation, the total point of soil in the country exceeds the standard It was 16.1%, and the proportions of light, light, moderate, and severe pollution points were 11.2%, 2.3%, 1.5%, and 1.1%, respectively. The soil pollution in the south is heavier than that in the north. The Yangtze River Delta, the Pearl River Delta, and the old industrial bases in Northeast China and other regions have serious problems in soil pollution.
Under the situation of soil pollution, whether it is to repair the contaminated soil or to protect the uncontaminated soil, soil monitoring has become the top priority. Traditional soil sample processing methods have always been air-dried or low-temperature dried. The disadvantages are low efficiency and long drying. It is not possible to dispose of multiple samples in a timely manner. With the development of vacuum freeze-drying technology, shelf heating Freeze Dryer has been widely used in environmental protection soil freeze-drying. Some environmental monitoring departments took the lead in adopting the shelf heating Freeze Dryer as a dry disposal device. So far, a complete soil monitoring sample pretreatment scheme has been formed. The soil sample pre-treatment scheme covers freeze-drying and locking of elements before soil sample detection, freeze-drying and locking of soil organic matter, and locking of soil original form to ensure the maintenance of soil samples before testing to ensure the authenticity and effectiveness of soil sample monitoring.