CSTR反应器处理白酒酒糟的启动研究

在中温条件（35℃）下,利用CSTR厌氧反应器半分批式启动处理白酒酒糟,对启动过程的工艺参数（如pH值,VFA等）进行研究.结果,CSTR反应器采用初始物料低容积负荷1.0kgVS/（m3·d）,并以负荷0.5kg VS/（m3·d）逐增的方式启动,当容积负荷在1.0～2.5kg VS/（m3·d）范围,厌氧系统单位容积日产气量基本保持在1.45L/（L·d）以上,甲烷含量稳定在60％左右,pH值稳定在6.9～7.3,VFA稳定在1000mg/L左右,COD去除率稳定在78.7％～93.7％.研究提高了糟渣的利用率及沼气产量,降低了反应器启动的成本,具有经济可行性.

Study of CSTR Reactor Starting on Distillers Grains Wastewater Treatment

In mesophilic temperature conditions （35℃）,full-mix anaerobic digestion reactor CSTR（continuous stirred tank reactor） was used to treat distillers grains by semi-batch start,of which the parameters of start-up processing （such as pH,VFA,etc.） were studied.The results show that the CSTR reactor was started with low initial material volume load of 1.0kg VS/（m3 · d） and gradually increased by the rate of 0.5kg VS/（m3 · d）.When the range of volume load was 1.0 to 2.5kg VS/（m3 · d）,the daily biogas yield per unit volume kept in more than 1.45L/（L · d）,the content of methane stabilized at around 60%,pH value was stable at 6.9 to 7.3,VFA value stably kept in the vicinity of 1000mg/L and COD removal was stable at 78.7% to 93.7%.This study improved the utilization of distillers grains and biogas production,and reduced production costs of start-up processing,which might be feasible in economics.