According to the need of fertilizer, batch fermentation digesters can be reloaded 1 or 2 times a year. Large refueling should be carried out at a pool temperature of 15°C or more. Pool temperature and air temperature below 10°C are not suitable for large refueling because the biogas digesters are difficult to start under low temperature conditions. The following points should be made when refueling. 1. Prepare enough new material before discharging and start the digester immediately after discharge. 2. Remove impurities such as indigestible debris or deposited sediment when discharging. 3. Biogas tanks should retain 20% to 30% of activated sludge and feed liquids containing biogas bacteria as inoculants. 4. In the case of debris remediation and sedimentation, etc. in the large refueling cleaning pool, or after the maintenance of the digester after large discharge, all flaps should be opened to allow air to circulate, and it must be proved that the pool has not been safely tested in animals. When not allowed to operate under the pool. Operators in the pool must not use open fire lighting and are not allowed to smoke in the pool. Under the pool maintenance is not allowed single operation, the pool staff should be tied to the safety rope, the pool should have special guardianship, in case of accidents can be rescued in a timely manner. The mixed fermentation raw material digester is completely recharged once before entering the winter, and new materials are added to ensure the nutrients needed for winter fermentation and increase the winter production of biogas digesters. The large refueling should be stopped 15 to 20 days in advance, and the other requirements are the same as those for the large batch refueling digester. Root Canal Motor,Dental Endo Motor,Wireless Endo Motor,Dental Root Canal Endo Motor Hebi Tianchi Trading Co., Ltd , https://www.hebitianchi.com