非氧化性杀生剂与海水淡化用阻垢剂和消泡剂的配伍性研究

Study on compatibility of non-oxidizing biocides with antiscalant and defoamer for seawater desalination

为探索非氧化性杀生剂在低温多效海水淡化系统中的应用可能性,采用静态杀菌法、碳酸钙沉积法和鼓泡法分别测定了3种常用非氧化性杀生剂(SW303、QAS和EGD)、阻垢剂PM15l、消泡剂AF及其组合物的杀菌率、阻垢率和消泡率,并通过匹配因子法定量评价了3种杀生剂与PM15l、AF之间的配伍性。结果显示,3种杀生剂对PM15l阻垢性能主要表现为相加作用,对AF消泡性能主要表现为相加和增效作用。PM15l对3种杀生剂性能的影响各不相同,对SW303表现为相加作用,对QAS和EGD表现为相减或拮抗作用,且低浓度PM15l即可对EGD的杀菌性能造成明显干扰,但仅有高浓度的PM15l才对QAS的性能造成干扰;AF对3种杀生剂杀生性能的影响较小,匹配因子在2.72~9.80之间,均为相加作用。

In order to explore the possibility of application of non-oxidizing biocides in low temperature multi-effect seawater desalination system,the bactericidal rate,scale inhibition rate and defoaming rate of three commonly used non-oxidizing biocides:SW303,QAS and EGD,scale inhibitor PM15l,defoamer AF and their compositions,were determined by static sterilization method,calcium carbonate precipitation method and bubbling method;the compatibility of the above biocides with PM15l and AF was quantitatively evaluated by matching factor method.The results showed that,the scale inhibition performance of the said three biocides on PM15l was mainly shown as additive effect;besides,the deforming performance of them on AF was shown as additive and synergistic effect.The effect of PM15l on the said three kinds of biocides was different,which showed additive action to SW303,attenuation or antagonism to QAS and EGD.Low concentration PM15l could obviously interfere the bactericidal performance of EGD,but only high concentration PM15l interfered the bactericidal performance of QAS.AF had slight effect on the biocidial performance of the said three biocides,the matching factor ranged from 2.72 to 9.80,which all shown as additive effect.