The characterization of biogas digester
1. The inner biogas digester of diaphragm is made of high-strengthened, high-elastic synthetic engineering diaphragm and of perfect anti-acid and anti-corrosion ability. Its capacity of absorbing the ambient heat and storing it is 30 % higher than that of other material.
2. The biogas digester is made by adopting a technology of combining internal digester and external protector. The outer protector is made of FRP which can be used for about 20-30years. In this way, it not only minimizes the possibility of doing damage to the internal digester, prolong its life span, and also create a complete oxygen-free room for anaerobic microorganisms to do fermentation, which in return increases the biogas output ratio.
What can the products do?
1. The biogas reactor can use all kinds of manure\sewage\straw or some organic waste to produce biogas. The biogas contains about 50%-60% methane and its caloricity 5000 kilocalorie. The biogas can be used for cooking\heating water\lighting\generating. And it won’t make the bottom of the pot become black.
2. 6cbm biogas reactor can produce biogas 2 m³ biogas which can supply the family with 2- 3 persons cooking and heating water.
Why FRP for Biogas Plants?
Comparative advantages
1. Less time required for installation and shortened period of construction
2. Less demanding for skilled masons and labors and easier for quality control
3. Less gas leakage and easier maintenance for gas tightness
4. Better adaptable to long rainy seasons, high groundwater table, and soft foundation soil
5. Good for mass prefabrication for large-scale installation
6. Fabrication technologies and facilities readily available
| Laying the SMC Sketch Sheet | SMC Hydraulic Press Process |
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| Release from the Press Mould | Half of the Biogas tank finished |
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| Model | Volume (m³) | Size (mm) | Thickness (mm) | Weight (kg) |
| 06 | 6 | 2320×2000 | 6-7 | 140 |
| 07 | 7 | 2320×2200 | 6-7 | 160 |
| 08 | 8 | 2320×2400 | 6-7 | 180 |
| 10 | 10 | 2400*2460 | 6-7 | 210 |
| 12 | 12 | 2400*2580 | 6-7 | 240 |
| Comparative indicators | Concrete digester | Semi-glass fiber reinforced plastic methane digester | All-glass fiber reinforced plastic methane digester |
| Mode of production | Household build with clay | Household build with clay | Industrial volume production |
| Weight&transportation | 8000kg/set | 7000kg/set | 180kg/set |
| Dynam capacity | High intension but poor tenacity | High intension but poor tenacity | High intension and good tenacity |
| Construction time | Difficult construction with 20 days | Difficult construction with 10 days | To install the two half tank need 1 day |
| Effection degree of geography condition | If the foundation is not good,ground water level is high,it is difficult to build | If the foundation is not good,ground water level is high,it is difficult to build | Highly structured,good integrity and it is not easy to limited by geography condition |
| Sealing & leakage capacity | Easy to leakage | Easy to leak because it is difficult to seal the glass reinforced plastic cover and concrete body | Full water load 24h,no leakage, with 10kpa pressure and without pressure drop in 24 hours |
| Producing rate of gas | Nomal | Higher | Highest |
| Service life | No more than 10 years | No more than 15 years | 20—30 years |
| Maintainance | In order to prevent gas leakage,need to maintain at fixed period | In order to prevent gas leakage,need to maintain at fixed period | No need to maintain |
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