Monitoring of farm biogas plants. Sindrup and Boddum biogas plants

摘要

The aim was, with the help of computerized monitoring systems, to monitor and document the operation, costs and investments related to two types of biomass conversion plants for methane production at Sindrup and Boddum farms in Denmark. On this basis, automatic monitoring of farm biogas plants will be developed to ensure stable operation. An overview of the monitoring system is given in addition to operational results from the two plants. The mean biogas yield from the Sindrup farm plant was 36.6 cubic meter methane from the farm's fresh pig manure. Biogas yields are improved when animals are fed with foods rich in fat and protein whereas manures with a very high content of volatile solids can give low yields. The addition of easily degradable industrial wastes as a supplement to the manure can also increase methane production. It is recommended to install larger horizontal biogas plants of 320-400 cubic meters that can process 20-30 cubic meters of manure daily. These do not require the addition of concentrated industrial wastes or other types of biomass in order to produce 440-660 cubic meters of methane daily. (AB)