厌氧条件下序批操作与连续操作对基质利用的影响

Effects of sequencing batch and continuous operation on utilization of carbohydrate in anaerobic system

研究了在厌氧条件下以葡萄糖为基质的序批操作与连续操作反应器中微生物利用基质的不同途径。结果表明,在连续操作中,反应器内的VFA及污泥中的糖原含量保持不变,葡萄糖被用于产生甲烷和微生物增殖,两者分别占进水COD的79.34%和20.62%。在序批操作中,当进水结束时,50.17%的葡萄糖被转化为糖原储存于细胞体内,反应器内的VFA、产生的甲烷及微生物增殖分别占进水COD的25.05%、11.56%和13.22%;当反应结束时,葡萄糖转化为甲烷和微生物细胞的部分分别占进水COD的78.13%和20.6%,积累的VFA及储存的糖原被微生物代谢。两种不同操作模式下葡萄糖的代谢途径不同,序批式反应器中由于糖原储存的存在,减缓了VFA的积累,为厌氧系统的高效、稳定运行提供了保证。

Substrate utilization in glucose-fed anaerobic reactors under batch and continuous operation was investigated.The results indicated that glycogen of sludge and VFA kept the constant in continuous operation,glucose was expended 79.34% for methane production and 20.62% for microorganism hyperplasia.In batch operation,50.17% glucose was changed into glycogen and stored in cell,VFA,methane and mirooraganism needed glucose 25.05%,11.56%,13.22%.When the react end,methane and microorganism consumed glucose 78.13% and 20.6%,respectively,and the accumulated VFA and glycogen were depleted.The metabolic pathways of glucose in two systems were different from each other.The accumulation of VFA was retarded due to the storage of glycogen in batch reactor,which ensured efficient and stable operation of anaerobic systems.