厌氧消化过程微生物生态系统的建模与生态规律的研究

Modelling and Ecological regularization of Microfloras in the Anaerobic Digestion Processes

厌氧消化过程的有效性依赖于微生物种群结构的完整性及其生态关系的平衡性。本文选择水解发酵菌、产氢产乙酸菌和产甲烷菌组成微生物链；提出了全混合式反应器条件下具有二阶生长速率的三菌群系统生态模型：判别了模型的三类平衡点及其稳定性；讨论了各类菌群生长历程、稳定速率及其与系统稀释速率的关系．

The efficiency of anaerobic digestion processes comes from a complete structure and anecological balance of the microfloras. In this paper,kydrolytic-fermentative bacteria,H2-producingand acetogenic bacteria and methanogenic bactetia are chosen to form a microbial chain The ecologicalmodels of the three microfloras system with second-order growth rate are proposed under the conditionof fully mixed reactor. Three kinds of equilibriums are found and the stability for each equilibrium is analyzed. The growth courses and stability of the three microfloras, and their relations with diluterate of Systcm are discussed respectlvely.