《Water Research》杂志刊登“粪便沼气反应器内化学物质的消泡效果”

作  者：P.G. Kougias, P. Tsapekos, K. Boe, I. Angelidaki

刊  物：《Water Research》，2013年，47卷第16期，6280-6288页

关键词：防泡剂；泡沫减少效率；厌氧消化发泡；牛粪；沼气

摘  要：由于泡沫是非常复杂现象，寻找生物过程中精确、高效的消泡控制策略是一项具有挑战性的任务。然而，泡沫的控制是必要的，如控制泡沫在沼气反应器中是一个主要操作问题。本研究中，在生料和被消化的肥料里对浓度比为0.05%、0.1%和0.5%的14中化学物质的消泡效果进行评估，此外，比较分析两种不同防泡剂注入方式下的泡沫减少效率。研究发现天然油脂（油菜籽和向日葵油）、不饱和脂肪酸（油酸、辛酸和天然脂肪酸）、硅氧烷（聚二甲硅氧烷）和酯（磷酸三丁酯）是最有效抑制泡沫的化合物。消泡剂效率依赖于其物理化学性质并且与决定泡沫溶解性的化学特性有极大相关性。当消泡剂直接添加到液相而非反应堆的顶部时，其减少泡沫更佳。

Antifoaming effect of chemical compounds in manure biogas reactors

Authors: P.G. Kougias, P. Tsapekos, K. Boe, I. Angelidaki

Journal: Water Research, Volume 47, Number 16 (2013), 6280-6288

Key words: Antifoaming agents; Foam reduction efficiency; Anaerobic digestion foaming; Cattle manure; Biogas

Abstract: 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/Vsample, 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.

原文链接：http://www.sciencedirect.com/science/article/pii/S0043135413006209