渗滤液回灌对厌氧生物反应器产甲烷影响的研究

Influence of Leachate Recirculation on Producing Methane in Anaerobic Bioreactor

在不同温度下,通过对3个已进入产甲烷期的厌氧型生物反应器实施不同的回灌操作,并对渗滤液的pH值、TDS、COD、氨氮浓度和产气量的监测数据进行对比分析表明:在温度较高时,高回灌频率1d/次有利于促进产甲烷速率的提高;在温度较低时,适当的低回灌频率5d/次更加有利。同时保持较高的温度(35℃左右)也有利于提高厌氧型生物反应器的产甲烷速率,其中在恒温下的D2柱的平均产甲烷速率高达2314mL/d,而在室温下的D1柱仅为D2柱的40%。

Through different methods of leachate recirculation in three simulated modes of anaerobic bioreactor which were producing methane at various temperatures, and based on detecting and analyzing concentration of TDS, COD, NHa-N and pH in leachate as well as capacity of gas producing in the landfill columns, results showed that leachate recirculation of high frequency with 1 time a day can make for accelerating velocity of producing methane in high temperature while that low frequency with 5 times a day is better at low temperature. Keeping temperature high about 35℃ can redound to enhancing velocity of producing methane. Average velocity of producing methane in D2 bioreactor reached 2,314mL/d, which was 2.5 times larger than that in D1.