Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark.
Water Res. 2013 Oct 15;47(16):6280-8. doi: 10.1016/j.watres.2013.07.045. Epub 2013 Aug 9.
A precise and efficient antifoaming control strategy in bioprocesses is a challenging task as foaming is a very complex phenomenon. Nevertheless, foam control is necessary, as foam is a major operational problem in biogas reactors. In the present study, the effect of 14 chemical compounds on foam reduction was evaluated at concentration of 0.05%, 0.1% and 0.5% v/v(sample), in raw and digested manure. Moreover, two antifoam injection methods were compared for foam reduction efficiency. Natural oils (rapeseed and sunflower oil), fatty acids (oleic, octanoic and derivative of natural fatty acids), siloxanes (polydimethylsiloxane) and ester (tributylphosphate) were found to be the most efficient compounds to suppress foam. The efficiency of antifoamers was dependant on their physicochemical properties and greatly correlated to their chemical characteristics for dissolving foam. The antifoamers were more efficient in reducing foam when added directly into the liquid phase rather than added in the headspace of the reactor.
在生物工艺中，精确且高效的消泡控制策略是一项极具挑战性的任务，因为泡沫的产生是一个非常复杂的现象。然而，泡沫控制是必要的，因为泡沫是沼气反应器中的一个主要操作问题。在本研究中，评估了 14 种化合物在 0.05%、0.1%和 0.5%v/v（样品）浓度下对泡沫减少的影响，分别在原始和消化粪便中。此外，还比较了两种消泡剂注入方法的消泡效率。天然油（菜籽油和葵花籽油）、脂肪酸（油酸、辛酸和天然脂肪酸的衍生物）、硅氧烷（聚二甲基硅氧烷）和酯（磷酸三丁酯）被发现是抑制泡沫最有效的化合物。消泡剂的效率取决于它们的物理化学性质，并与其溶解泡沫的化学特性密切相关。消泡剂在直接添加到液相中时比在反应器的气相中添加时更能有效地减少泡沫。
