Bio Gas

Bio Gas Program:

Bio Gas Program:

Bangladesh is densely populated country. Large proportions of rural and urban poor traditionally harvest; fire wood, Vegetation, animal excreta and agricultural resides for domestic cooking. The aim of BIOGAS is to promote the sustainable production of renewable energy from the biogas obtained of agricultural residues and food and beverage industry waste (agro-food waste) in small-scale concepts for energy self-sufficiency. Electricity, petroleum, natural gas and coal are the major energy, but these are not available in the rural areas through those facilities are limited in town areas. Bio Gas is the Gas produced by ANAEROBIC DIGESTION of waste material of plant and animal origin. Biogas is a mixture of methane (60%-70%), Carbon Dioxide (30%-40%), and traces of the other gases, like hydrogen sulphide and hydrogen.

Objectives:

Objectives:

  • Exploiting effectively biogas technology and developing a commercial viable biogas sector in Bangladesh; and
  • Contributing to rural development and environmental protection via provision of clean and affordable energy to rural households.
  • Improving of community's sanitation and rural people's health, creation of job for rural labor and reduction of greenhouse gas emission.


The achievements of this target will not be possible without adequate institutional setup and cooperation between public and private actors. In addition, emerging market-based financial mechanisms like results-based financing and climate finance, technical innovations and demand for medium scale biogas also need a platform for discussion and advancement.

BIOGAS plant model:

BIOGAS plant model:

1. Biogas Plant Model (fixed dome design)

BiogasPlantModel

2. Biogas Plant Model (Fiberglass bio-digester)

Fiberglass-bio-digester

1. Material requirement for brick-cement based plant

Size of Biogas Plant (m3) Approx. No. of Cattle Required Total Dung Required / day (Kg) Approx. No. of Birds Required Total Litter Required / day (Kg) Dung requirement for initial charging (Kg)
1.2 4 33 200 17 1,500
1.6 5 43 250 23 1,900
2.0 6 54 300 28 2,400
2.4 8 65 350 34 2,900
3.2 10 87 450 45 3,900
4.8 14 130 700 68 5,900


∗ For cattle dung based plant, dung – water mixing ratio is 1: 1 and for poultry litter based plant, litter – water mixing ratio is 1: 2

2. Material requirement for fiberglass based plant:

Daily expected gas production (min-max) Cow-dung based Poultry litter based Kitchen & garden waste based (4 days pre-hydrolyzed in 20-50 l buckets/ barrels) Single burner stove will run for (hours)
Required fresh dung (kg) Required dung for starting (kg) Up to Required fresh litter (kg) Required cow dung for starting (kg) Up to Required Kitchen & garden waste (kg) Required cow dung for starting (kg)
1.8 40 2400 20 600 10-15 1200 2.5-4.0
2.4 53 3200 27 800 20-30 1600 3.5-6.0
3.0 66 4000 34 1000 30-40 2000 4.5-7.5

∗ For cattle dung based plant, dung – water mixing ratio is 1 : 0.5

∗ For poultry litter based plant, litter – water mixing ratio is 1 : 2

∗ For kitchen waste based plant, waste – water mixing ratio is 1 : 1

Advantage of Bio Gas:

Advantage of Bio Gas:

  • Renewable Source of Energy
  • Cost Effective
  • Non-Polluting
  • Reduces Landfills
  • Cheaper Technology
  • Large number of Jobs
  • Little Capital Investment
  • Reduces Greenhouse Effect

Bio Gas plant size and costing:

Bio Gas plant size and costing:

Size of plant How many hours a day burning stove Daily cow dung or poultry Liter need Estimated cost of plant construction
Cow Dung Poultry Liter Taka
2 M3 4-5 Hr 54 Kg 28 Kg 31,000
2.4 M3 5-6 Hr 65 Kg 34 Kg 36,000
3.2 M3 7-8 Hr 87 Kg 45 Kg 40,000
4.8 M3 10-12 Hr 130 Kg 68 Kg 50,000