Biogas
GreenGaz – family and farming biogas systems
The biogas concept we can offer is primarily suitable for farmer's home and small farms. The family size biogas system is composed of one 10m3 biogas digester, a pipe system, a gas purify system, appliances and/or an electricity generator.
The medium size biogas system is designed for small size livestock farms to treat the animal waste, for schools or factories etc. and to treat wastewater from toilets. The medium size biogas system is composed of a group of 10m3 biogas digester that are formed into one unit, a pipe system, a gas purify system, appliances and/or an electricity generator.
For both the family size and the medium size biogas system, we provide all the necessary equipments and products needed to build the system and train technicians for our customers. Our customers build the biogas system with our equipments and products by them selves or with our assistance. The following are the equipments and products needed to build a family size and medium size biogas system:
The steel mould
This product is composed of a number of steel moulding boards, and is used to construct the concrete digester. By using a steel mould，a 10m3 biogas digester can be built within 48 hours. The steel mould is reusable and can be used over 2000 times, last over ten years. It is very easy to build the concrete digester with the steel mould, because the constructers need no blueprint, and putting the steel mould together is the only skill required. Thus, using the steel mould can greatly increase the speed and quality of the concrete digester construction.
The Gasholder
The glass fibre reinforced plastic gasholder is one of the main components of Biogas Plant, whose function is to collect and store the biogas produced in the digester. The gasholders volume is 1.2 m3. The gasholder can last over 10 years.
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Introduction to the GreenGaz biogas plant
This biogas plant is of the hydraulic pressure biogas plant type, and is composed of a concrete digester and a glass fibre reinforced plastic gasholder. The digester has a capacity of 6 or 10 cubic meters, and is constituted by a stomach, a neck, an inlet and an outlet. The gasholder is 1.6 m in diameter, 1 or 1.2 cubic meter in capacity. The gasholder is installed within the digester neck, fixed by a component; the gasholder and the digester are sealed up with water.
Why is it so good?
Comparing with the traditional fixed dome type hydraulic biogas plant, this Biogas Digester has the following distinct advantages:
Easy to build and 100% success rate: The construction of our biogas plant is exempt from the difficult airtight craft, so the technical difficulty is greatly decreased, and the construction period is greatly shortened. To build a GreenGaz biogas digester successfully, the constructers are only required to master how to assemble and disassemble the steel mould. Any workman can learn to build GreenGaz biogas digester within a day and with 100% success rate.
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1. Dig a hole in the ground |
2. Assemble the stomach mould | 3. Assemble the vault ground |
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| 4. Cast the digester stomach | 5. Assemble the neck mould | 6. Cast the digester neck |
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| 7. Disassemble the mould | 8.Build the inlet and outlet | 9. Install the gas holder |
The Family Size Biogas Plant
Medium Size Biogas Plant
A 210 m3 midium size Biogas Plant composed of 21 ten cubic meter plants formed in a group was built for a pig farm in Bolo County of Guangdong for the treatment of 1000 pig's waste sewage. The biogas is provided to generate electricity. August 30, 2006 completion.
Big Size Biogas Plant
For more info on the big size systems, as for more information
Some Advantages With the GreenGaz Biogas Concept
1) Suitable for vast rapid construction: The steel mould and the glass fibre reinforced plastic gasholder can be mass-produced in factories, so that any place or country can build the plants on a vast scale.
2) Convenient to replace solid fermentation material; suitable for straw and other solid organic material: The gasholder is only 30 kg in weight, and can eliminate the atmospheric pressure. So it is effortless to take out the gasholder from the digester, and easy to replace solid material through the digester neck (1.5m in diameter).
3) Easy to maintain and a long service life: When the gasholder is leaking, the leak can be found immediately, and can be repaired on ground. The concrete digester can last over 30 years, and the glass fibre reinforced plastic gasholder over 10 years. When the gasholder is worn out, a new one is replaceable, so that the biogas plant can last over 30 years.
4) Excellent airtight function and the high rate of biogas production: The glass fibre reinforced plastic gasholder sealed up by water is 100% airtight. Since replacing the fermentation material is easy, the digester can sustain sufficient fermentation material, so can the biogas plant have a high rate of biogas production.
5) Excellent safety and easy operation: When the gasholder is taken out, no biogas is left in the digester. The digester neck (1.5m in dia.) is large enough to keep sufficient fresh air in the digester. So it is safe both to repair the digester inside and to replace fermentation material. When the gas pressure reaches its limit, there will be automatic gas leak, hence no damage to the plant.
Biogas digesters
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Product |
Type |
Price |
Packing weight |
Packing volume
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Steel mould |
10m3 |
€ 9 500
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915 kg/set |
2.5m3/set |
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Steel mould with Outer
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10m3 |
€ 12 500
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1265 kg/set |
3.0m3/set |
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Glass fibre reinforced plastic gas-holder |
1.2m3 |
€ 420
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29 kg/set |
30 sets/6m3 |
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Glass fibre reinforced plastic cover |
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€ 390
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26 kg/set |
50 sets /8m3 |
Prices in €, ex transportation and VAT
So what's the cost? Find out yourself!
Cost Breakdown of a 10 m3 Biogas Plant (do-it-yourself)
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Material (manpower) |
Quantity |
Unit price |
Price
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Glass fibre reinforced plastic Gasholder, 1.2 m3 |
1 |
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Smashed stone |
3 m3 |
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Sand |
2.5 m3 |
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cement |
1100 kg |
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Brick (60×120×240mm) |
100 |
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Concrete pipe (Φ300+30-×1000mm) |
3 |
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Concrete bar (Φ6 mm) |
8 kg |
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manpower |
6 man × 1 day (digging hole)+ 6 man × 1 day (casting)+ 2 man × 1 day (to build inlet, outlet and install pipe system) |
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Steel mould (if you don´t rent one) |
€ 12 500 (lasts for 2000 digesters) |
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Gas-holder (one per digester) |
€ 420 |
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Plastic cover |
€ 390 |
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Fittings, gauges etc (see below) |
€ 100 (Approx) |
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Total Cost |
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Auxiliary Equipment
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Product |
Type |
Price |
Packing Weight |
Packing Volume |
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Biogas stove
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Double burner |
€ 48
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5.0 kg/set |
725mm×400mm×125mm/set |
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Biogas stove |
Large burner |
€ 65
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5.6 kg/set |
540mm×325mm×152mm/set |
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Biogas rice cooker
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2L-B |
€ 60
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3.3 kg/set |
305mm×305mm×335mm/set |
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Biogas Water heater
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7L |
€ 130
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7.0 kg/set |
615mm×370mm×195mm/set |
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Biogas fittings (30m pipe, pressure gage, valve, etc) |
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€ 55
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9.2 kg/set |
310mm×300mm×260mm/set |
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Desulphurize |
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€ 12
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1 kg/set |
310mm×300mm×260mm /10 sets |
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Pressure gage |
0-10kpa |
€ 9
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6 kg/100sets |
310mm×300mm×260mm /100 sets |
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Pressure gage
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0-16kpa |
€ 11 |
6 kg/100sets |
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Biogas lamp |
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€ 13
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0.5 kg/set |
310mm×300mm×260mm /8 sets |
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Flow meter |
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€ 130
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1.5 kg/set |
310mm×300mm×260mm /4 sets |
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Generator |
600 W |
€ 525 |
24.4 kg/set |
490mm×385mm×425mm/set |
Prices in €, ex transportation and VAT
Relationship between the volume of biogas plant and livestock
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Item |
Unit |
Pig |
Cow |
Sheep
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Chicken
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Daily Faeces
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kg |
3.0 |
15.0 |
1.5 |
0.1 |
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Dry material content |
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18 |
17 |
75 |
30.0 |
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10m3 biogas plant |
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8 |
3 |
32 |
278 |
Raw material needed to produce 1 normal cubic meter biogas
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Raw material |
Water content (%) |
Raw material needed to produce 1 cubic meter biogas（in kg） |
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Dry matter |
Fresh matter |
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Pig Manure
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82 |
4.00 |
13.85 |
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Cow Manure
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83 |
5.26 |
26.21 |
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Chicken Manure |
70 |
4.00 |
13.85 |
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Human Manure |
80 |
3.33 |
16.65 |
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Rice Straw |
15 |
3.84 |
4.44 |
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Wheat Straw
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15 |
3.70 |
4.33 |
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Corn stalks |
18 |
3.45 |
4.07 |
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Water Hyacinth |
93 |
3.22 |
45.57 |
Raw material parameters
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Raw material |
C％ |
N% |
C:N |
Methane content of biogas produced (％) |
Gas duration (d) |
Dry material content (％) |
Dry material biogas production rate (L/kg) |
Raw material biogas production rate (L/kg) |
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Dry Wheat Straw |
46 |
0.53 |
87:1 |
59 |
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82 |
425 |
348 |
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Dry Rice Straw |
42 |
0.63 |
67:1 |
61 |
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83 |
409 |
340 |
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Corn stalks |
40 |
0.75 |
53:1 |
53~59 |
90 |
80 |
412 |
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Fresh grass |
11 |
0.54 |
26:1 |
70 |
60 |
24 |
455 |
107 |
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Fresh Sheep Manure |
16 |
0.55 |
29:1 |
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Fresh cow Manure |
7.3 |
0.29 |
25:1 |
50~60 |
90 |
17 |
205 |
35 |
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Fresh Pig Manure |
7.8 |
0.60 |
13:1 |
65 |
60 |
18 |
425 |
77 |
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Fresh Human Manure |
2.5 |
0.65 |
2.9:1 |
50 |
30 |
20 |
426 |
85 |
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Fresh Horse Manure |
10 |
0.24 |
24:1 |
60 |
90 |
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279 |
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GreenForze can supply you with a range of small to medium scale equipment for the production of biofuels as well as green electricity. If there is something you can not find or if you need further information, please fill in the form in the below and write a few lines about what you need from us:
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