1, Select the appropriate temperature range based on peptide characteristics
Consider the stability of peptides
Peptides are sensitive to temperature, and high temperatures may cause their denaturation and inactivation. For peptides with poor stability, the drying temperature should be controlled at a lower level as much as possible. For example, some peptides containing special amino acids such as Met, Cys, Trp, Gln, or Asn are prone to degradation, and strict temperature control is necessary during drying to avoid structural damage or loss of activity.
Source and use of reference peptides
If peptides are extracted from living organisms and used for biological activity research, they usually need to be dried at low temperatures to maintain their biological activity. If it is a peptide that has undergone chemical synthesis and does not require high activity for subsequent applications, temperature control can be relatively relaxed.
2, Using appropriate drying equipment and its functions to control temperature
Low temperature spray dryer
Precise temperature presetting: In the low-temperature spray dryer, hot air can be heated to a predetermined temperature. The setting of this temperature requires comprehensive consideration of the properties of peptides and drying requirements. For example, for thermosensitive peptides, the set temperature may only be slightly higher than room temperature to ensure drying at a lower temperature, avoiding damage to the peptides from high temperatures while ensuring effective evaporation of moisture.
Collaborative control of temperature and humidity: This type of equipment can accurately control the temperature and humidity inside the drying room. By adjusting these two parameters reasonably, the drying process can be carried out under suitable conditions. For example, when the humidity in the drying room is high, the temperature can be appropriately lowered and the drying time can be extended to achieve better drying effect without affecting the quality of peptides.
Centrifugal spray dryer
Adjust the inlet and tower temperature: during the drying of soybean peptides, the inlet temperature and tower temperature of the centrifugal spray dryer need to be set reasonably. If the inlet temperature is 125-130 ℃, the tower temperature is 75-78 ℃, and the exhaust outlet temperature is 80-85 ℃, effective temperature control of the entire drying process can be achieved by adjusting the temperatures of these different parts to meet the drying needs of peptides.
3, Temperature monitoring and adjustment during the drying process
Real time temperature monitoring
Real time monitoring of temperature during the drying process using temperature sensors and other devices. For example, in spray drying equipment, temperature sensors can be installed at different positions in the drying room to obtain temperature data in a timely and accurate manner.
Adjustment based on monitoring results
If the temperature deviates from the set range, adjust the power of the heating equipment or adjust the flow rate of the drying medium (such as hot air) in a timely manner. For example, if the temperature is too high, the heating power can be reduced or the flow rate of the drying medium can be increased to quickly bring the temperature back to the appropriate range.