Influence of Organic Matrix and Cations on Bio-Methane Yield with Anthracite Methanogenic Consortium

Abstract

Organic compounds fermentation of coal has been used to generate secondary biogenic gas and enhance gas reservoirs in coalbed. To enhance the bio-degradation process, culture nutrition plays an important role in remediating the nutritional deficiency of the coal seam. The influence of bio-methane yield with organic inputs and cations concentrations was examined. Research of organic matrix influence revealed that the traditional organic material except yeast extract should forbid, and the input of yeast extract should limit at 1.00g/L also. Further, the study demonstrated that the ion concentration of sodium, potassium, magnesium, calcium and ammonia nitrogen also influenced methane and carbon dioxide yields. And the optimize concentrations for Ca2+, K+, Na+, Mg2+ were 5.1, 1.7, 23 and 1.3 mmol/L. The Mg2+ was particularly sensitive in inhibiting CH4 metabolism processes largely for gas-coal methanogenic consortium.