We have specialized in providing industrial processing equipment for fine chemicals, pesticides, new energy,new materials, and pharmaceutical industries for more than 48 years.
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We have specialized in providing industrial processing equipment for fine chemicals, pesticides, new energy,new materials, and pharmaceutical industries for more than 48 years.
Currently, the drying process for red yeast rice utilizes oven drying, with a broad range of time and temperature parameters, resulting in low drying efficiency and inconsistencies in the quality of red yeast rice between batches. The purpose of this project is to investigate the red yeast rice drying process, standardize process control, narrow the range of technical parameters, and ensure more uniform and stable product quality. Additionally, the project aims to reduce labor costs and increase production efficiency by establishing standards for the preparation of red yeast rice and improving product quality. After over 30 experiments on drying red yeast rice materials, three effective solutions were proposed. The project team unanimously agreed on the third solution, which involves using a trough-type hot air drying unit as the focus for the later stages of the project.
According to the initial plan, a series of drying experiments were conducted by the end of September 2018, leading to a preliminary conclusion that maintaining the material temperature between 80-90°C and the moisture content between 5-1% over an extended period yields better transformation. To further confirm the reliability of these conditions, multiple experiments are required to verify and find more precise drying parameters. Previous experimental detection items included characteristics, moisture content, fingerprint chromatograms, lovastatin content, and lovastatin acid content. After evaluation by the quality department, it was decided to only test for moisture content, lovastatin content, and lovastatin acid content.
Drying equipment for red koji production
Initial charge of 12 kg with jacket water temperature set at 80°C. Set the inlet air temperature at 120°C and material temperature at 80°C. Full exhaust ventilation is applied for the first 90 minutes. After 90 minutes, the fan is turned off and the inlet air is stopped, and the material is dried using the jacket temperature for drying. Material code: 20181217. The wet material test result from the production workshop was 0.28% dry matter, and the dry matter result was 0.22%.
Upon analyzing the above data, it is evident that the material temperature, duration, and moisture content are comparable to the initial four batches from the 2019 experiment. This indicates that the material undergoes effective transformation when the temperature is held at 80℃, moisture levels are maintained at or below 5%, and the drying process spans 5-6 hours. Thus, the theoretical proposition that these parameters yield favorable transformation results is substantiated.
Through 21 experiments conducted using various pieces of equipment, a uniform outcome was established. Specifically, when the material temperature is regulated within the range of 75-85℃, moisture content is kept below 5%, and the drying time is set at 5-6 hours, the trough-type hot air drying unit surpasses the performance levels of both the oven and the fluidized bed under identical conditions.
