Huang ginger cleaner production technology can reduce emissions

Recently, the clean production technology of saponin extracted from Dioscorea zingiberensis (Ginger) developed by Shaanxi Province Environmental Protection Bureau and supported by the Shaanxi Provincial Environmental Protection Bureau was identified by experts.
The mountainous area in southern Shaanxi is an important producing area of ​​yellow ginger in China, and it is also the water source of the Han River. For many years, people in the mountains have been using yellow ginger as an important means of getting out of poverty. However, the traditional yellow ginger extraction saponin process produces a large amount of waste water, and the pollution is large. According to statistics, 250 tons to 1,000 tons of wastewater can be produced per ton of saponin produced. The traditional fermentation-gasoline extraction method uses a large amount of organic solvents. The recovery of solvent gasoline is difficult to deal with and direct emissions, and it has become a difficult bone in Shaanxi's pollution control process, and it has also restricted the production and development of turmeric products.
This time through the identification of "Dendrobium diffusa (Yellow Ginger) extraction of saponin cleaner production" technology, the microelectronics processing technology, acid hydrolysis and neutralization process and CO2 supercritical extraction process ingeniously combined with a neutralizing agent instead of direct washing method It overcomes the shortcomings such as low yield of traditional saponin, serious loss of semi-finished products, and large amount of waste water discharge. There is no loss of semi-finished products and no discharge of waste water. The new process adopts CO2 supercritical extraction technology, which saves a lot of organic solvents and avoids the danger of flammability and explosion. The resulting sludge can be used as fertilizer to reduce pollution. This process cuts pollution from the source, increases resource utilization, and reduces the generation and emission of pollutants in the production process.