活性污泥厌氧初期吸附降解木醋液产甲烷试验

试验研究活性污泥厌氧初期吸附降解木醋液及产甲烷情况。结果表明，活性污泥对木醋液的厌氧初期吸附在10min内达到动态平衡，木醋液降解率为15.6%，主要是物理性吸附；10min后，吸附为物理性和生物性吸附共同作用；伴随着吸附过程木醋液中有机物的水解酸化，醋酸和丙酸含量增加，pH值下降；被吸附降解的有机物以酚类化合物为主；木醋液及其主要有机物的吸附过程可以很好地用Freundlich吸附等温方程描述；甲烷产量随着木醋液初始体积分数的增加而增加。

Anaerobic Initial Adsorption and Degradation of Wood Vinegar on Activated Sludge to Produce Methane

The utilization of wood vinegar,a by-product of biomass pyrolysis,treated as wastes of agriculture and forest,has been attracting increasing interests all over the world.The anaerobic initial adsorption and degradation of wood vinegar to produce methane was investigated by using the activated sludge.The results indicated that the pseudoequilibrium of the anaerobic initial adsorption could be established in 10 min and the rate of degradation was 15.6% while the physical adsorption played a significant role.Physical and biological adsorption was interacted after 10 min.Accompanied by the acidification,the content of acetic acid and propionic acid were increased resulted in the pH value decreased.The style of organic matter adsorbed and degraded was mainly on phenolic compounds detected by GC-MS technique.The adsorption can be well described by the Freundlich equilibrium model.Methane analyzed by GC technique was increased with the increasing initial volume fraction of wood vinegar.The way of anaerobic adsorption and degradation on the activated sludge is the new path to treat the wood vinegar.