Common problems with rural biogas
- Newly built biogas digester, the water level of the biogas digester water pressure will drop after feeding.
When a newly built biogas digester is tested for water pressure through a water pressure chamber after adding raw materials, a common problem is that the water column drops after the water column between the water pressure rises to a certain height. There are three cases of the water column’s down lifting process. The first is that the speed of the water column drops first and then slows down. This may be a problem. Leakage occurs on the inner wall of the biogas tank or on the ground. Secondly, the drop rate of the water column is uniformly falling. This may be a problem. It is the air leakage phenomenon in the patio cover, and after that, the water column drops below the water pressure and the negative pressure appears, which indicates that the biogas digester has a serious water leakage phenomenon.
- The gas production is normal and suddenly drops significantly.
Newly built biogas digester At the beginning of feeding, all gas production is normal. Biogas cookers can be ignited and used normally. After a period of time, the gas production is significantly reduced, and even the gas production is not enough. There are two main situations: 1. There is too much fermentation raw material liquid in the biogas tank, which makes the effective gas tank volume of the biogas tank smaller, and there is not enough space to accommodate the existence of biogas; Leak points appear and gas leaks.
- The pressure is normal, but the cooker cannot ignite normally.
After the biogas is fed, it enters the use stage. The gas pressure gauge on the pipeline shows that there is a certain pressure, but the use of biogas is a phenomenon that the stove does not catch fire. There are two possible situations for this phenomenon: 1. Problems with biogas cookers; 2. The content of methane in biogas is low.
- No pressure or low pressure
If the pressure is low or there is no pressure, the biogas cannot be used it means that the biogas digester cannot produce gas normally. There are three main reasons for this:
4.1. The pH of the fermentation environment in the biogas tank is partial acidity;
4.2. The pH of the fermentation environment in the biogas tank is partial acidity;
4.3. The toxic substances appear in the biogas tank to kill anaerobic fermentation. The above three situations will cause the biogas digester to produce gas normally.