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Study on Gaseous Energy and Bio-fertilizer Production Using Biomass from Agricultural Residues

Md. Ahiduzzaman
Senior Scientific Officer
Farm Machinery and Postharvest Technology Division, Bangladesh Rice Research Institute, Gazipur-1701.

M Kamruzzaman, M Anwar Hossen, M Abul Quasem, M Syedul Islam
Farm Machinery and Postharvest Technology Division, Bangladesh Rice Research Institute, Gazipur-1701.

Abstract/ Executive Summary:

The biogas was continuing for 88 days from the mixture of cow dung and rice straw. Whereas, it was found from the literature that the retention of cow dung was only 45 days. Therefore, the experiment should be continued with different mix of other materials to optimize the biogas production from different wastes.

Keywords: Cowdung, Biogas, Burner, Rice straw,

Location: Gazipur

Start Date: 01-07-2006

End Date: 30-06-2007

Program Area: Crop-Soil-Water Management

Commodity: Bio fertilizer

Objectives:

1. To find out better combination of different agricultural residues to maximize biogas production.

2. To find out the optimum retention time of the slurry.

3. To produce bio-fertilizer

Methodology:

The digester was made of used oil drum and the gas chamber was made of steel sheet in BRRI workshop. Material used: Cow dung = 90 kg (wet) with 90% moisture content Rice straw = 5 kg (wet) with 10% moisture content Water = 100 kg Carbon and Nitrogen ratio of mix = 20 The rice straw was chopped into 1 inch size and mixed with cow dung according to the ratio mentioned above. The slurry was put in the digester. The gas chamber was inserted in the digester such a way that the slurry was covered with the gas chamber. The slurry was left for producing biogas. The biogas was produced after three days and the volume of gas was measured. After measuring the gas was burnt in a biogas burner.

Source of Information: BRRI Annual Research Review 2006-07

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The biogas production was continuing for 88 days from the mix of cow dung and rice straw. Whereas, it is found from the literature that the retention of cow dung is only 45 days. Therefore, the experiment should be continued with different mixture of other materials to optimize the biogas production from different wastes.

Knowledge Management: Report/Proceedings