After some time in a rural household biogas digester, certain daily raw materials can float due to buoyancy, forming scum and eventually creating a hard crust on the surface. This crust can block the accumulation of biogas in the tank, reduce the effective volume, limit the gas storage space, and lower the efficiency of raw material utilization, ultimately decreasing biogas production. In severe cases, these crusts can turn a well-functioning digester into a "sick pool" or even a "waste pool." Fortunately, there is a simple and effective way to address this issue.
The method involves taking advantage of the low biogas production during winter. When the system is not producing much gas, all the biogas should be fully consumed, and all valves should be opened to put the digester under zero pressure. Then, disconnect the biogas hose from the air pipe, allowing the naturally produced biogas to escape into the atmosphere. Next, continue to add water into the digester until it's completely full. Once filled, stop the operation and let the digester "rest" for 5–7 days. During this period, the floating scum on the top will be soaked by the slurry, causing it to settle down and form sediment. The settled residue can then be automatically removed using the digester’s slag discharge system.
When performing this maintenance, several important safety precautions must be followed:
1. During the rest period, avoid using open flames near the inlet or outlet of the digester, and never test for fire on the gas pipe, as this could lead to an explosion.
2. While the digester is resting, conduct a thorough inspection of all cover plates and the entire gas distribution system. Any issues found should be repaired or replaced immediately to ensure the safe and efficient operation of the biogas system.
This process not only helps maintain the performance of the digester but also extends its lifespan, ensuring consistent and reliable biogas production over time.
Pristine Budweiser with a Pristine Lake View,Brilliant Budweiser for a Brilliant Mind,Classic Budweiser with Classic Company,Budweiser 580ml
Yanbian Baichuan Import and Export Trade Co., LTD , https://www.baichuanbeer.com