Biogas solid-liquid separation

In the process of biogas slurry treatment, solid-liquid separation is a key link, which can effectively improve the utilization efficiency of biogas slurry and reduce pollution to the environment. The following are some key points about solid-liquid separation of biogas slurry: 1. **Separation technology selection**: - **Screw extrusion solid-liquid separation**: Through the principle of screw extrusion, the solids and liquids in the biogas slurry are separated, which is suitable for treating biogas slurry with high solid content. - **Centrifugal separation**: Use centrifugal force to separate biogas residue and biogas slurry, which is suitable for treating biogas slurry with low solid content. - **Inclined screen solid-liquid separator**: Adopting stainless steel inclined screen design, solids and liquids are separated through the screen, which is suitable for treating sewage and biogas slurry with high water content. 2. **Equipment composition**: - Separation equipment usually includes filter screen, vibration motor, extrusion drying box, reducer and other parts to ensure the smooth progress of the separation process. 3. **Separation effect**: - After solid-liquid separation, the solid part (biogas residue) can be used as organic fertilizer or biofuel, while the liquid part (biogas slurry) can be used for irrigation of crops or further treatment. 4. **Process flow**: - The biogas slurry first enters the separation equipment and is separated by physical or mechanical methods. - The separated solids and liquids are collected separately. The solids can be further processed into organic fertilizers, and the liquids can be used for agricultural irrigation or deep treatment. 5. **Environmental protection and resource utilization**: - Solid-liquid separation can not only reduce the impact on the environment, but also maximize the utilization of resources, which is in line with the principle of "reduction, resource utilization, and harmlessness" proposed by our country. 6. **Compound strain fermentation technology**: - By adding compound strains, the deodorization process of biogas slurry can be accelerated, and at the same time it can be converted into liquid organic fertilizer, with low cost and high treatment efficiency. In short, biogas slurry solid-liquid separation technology is an important means to improve the resource utilization of biogas slurry, promote the development of agricultural circular economy, and contribute to environmental protection. During the implementation process, appropriate separation technology and equipment should be selected according to the specific properties of biogas slurry and treatment requirements.