Investigations, Analysis and Study on Biogas Utilization in Cold Region of North China
Bio-methanation system was mature and has been widely utilized in South China, while hard to apply in the north. This paper aims to learn about the current situation of biogas utilization in North China, and develop the integrative biological reactor (IBR) which could make anaerobic fermentation well utilized in North China. Information was obtained via on-the-spot investigation and questionnaire survey (300 sent out, 247 effective). Through comparative analyses of the conditions, conclusions were made as follows: device’s disfunction, high cost, lack of understanding and short of materials were the main cause of the low biogas penetration rate. Experiments were made and corresponding solutions were obtained. The IBR was the integration of continuous stirred tank reactor (CSTR) and up-flow anaerobic sludge bed (UASB) reactor. Obtained from the test, when kitchen waste was used as substrate, the most suitable Volume Load Rate (VLR) for methane production was 6~8 kgCOD/(m3•d), the highest gas production rate was about 1.5~2.4L/d. And for the hydrogen production, the maximum of hydrogen production reached at 6L/d when the VLR stabilized at 15~20kgCOD/(m3d).
Yanguo Shi and Jinlong Zuo
L. Guo et al., "Investigations, Analysis and Study on Biogas Utilization in Cold Region of North China", Advanced Materials Research, Vols. 183-185, pp. 673-677, 2011