Biogas production

Savings in energy costs biogas production makes positive energy balance... 

Some other experiments at various scales and using distinct organic waste sources have been carried out. Volumes between 0. lm3 and 10,000 m3 were used. In every experiment the methane production increased. Best results were obtained with pig manure. In this case the biogas production increased to 200 %. The experiments thus proved that it was possible to increase the gas production using intensified microbiological biomass decomposition. 

K. L. Kovdcs, B. Polydk (1991) Hydrogenase reactions and utilization of hydrogen in biogas production and microbiological denitrification systems. Proceedings of the 4th IGT Symposium, Chapter 5, pp. 1-16, Colorado Springs... 

Bio-hydrogen is a possible, interesting output of biogas production, increasing the overall efficiency of the process through efficient and stable catalysts towards the main contaminants. 

Fig. 1 Organic loading (kg VS.d-1), biogas production (m3, d 1) and temperature (°C) of digestion in the plant 1.

On S.Matteo farm net biogas production is used for the dairy s steam generator. In the period October 83—June 84 the average biogas production is 210 m3, d 1 with 58% used to satisfy the digester heat requirement and 36% used for the dairy s steam generator. 

Environmental pollution is the subject of many political and social discussions in the Netherlands. This is mainly caused by the concentration of the animal husbandry farms close to the villages and cities. There are technical treatments of air and slurry to decrease the odour of it. Anaerobic digestion is one of these. This technology is known from biogasproduction. Most countries in the western world have studied this possibility for renewable energy. A lot of technical problems are solved but on most places it is not possible to produce biogas from farm waste to a competitive price. What is the feasibility for biogas production if there is a need for reduction of the odour emission on the farm ... 

For a 2000-pig farm there was calculated a profit with biogas production of Dfl. 4.000,- annual. But if here 50% of the biogas is not produced or used the result will be a loss of Dfl. 6000,-. Odom reduction costs in this case Dfl. 3,- per pigplace annual. 

Scheme of microbiological metabolic pathways for biogas production... 

Cumulative gas production curves showing intensification of biogas production from big manure in a 1001 digester... 

---