紫外线对水产养殖循环水的杀菌效果  

Bacterial inactivation effect of UV in aquaculture recirculating water

作　　者：郑荣进[1] 向坤[1] 朱松明[1] 

机构地区：[1]浙江大学生物系统工程与食品科学学院,杭州310058

出　　处：《农业工程学报》2011年第11期257-262,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07101-006)

摘　　要：为了研究循环水水产养殖系统紫外杀菌的效果,在循环水系统中对单灯管紫外装置杀灭养殖水中粪大肠菌群的效果进行了试验,研究了紫外灯功率、循环水流速和水的紫外光线透射率对杀菌效果的影响。结果表明,单位水体的紫外线功率越大,杀菌效果越好;水体通过紫外灯杀菌器的流速越大,单次通过杀菌器的杀菌量减少,但由于水体循环次数增加,总杀菌效果加大;254nm紫外线透射率越大,杀菌效果越好。在理论分析和试验数据的基础上,建立了循环水紫外线杀菌系统的模型,并得到了粪大肠菌群的一价失活系数为0.0062m2/J。对失活速率常数较小的菌群,增大紫外灯功率杀灭效果较好,而增加日循环次数杀灭效果提高不明显。该研究的结果可为循环水系统紫外线杀菌系统的设计和运行提供依据。In a recirculating aquaculture system with single-lamp UV devices,experiments were carried out to investigate the effect of UV light on fecal coliform inactivation.The research results showed that UV intensity,recirculating flow rate and UV transmittance of water were three important factors for UV inactivation efficiency.It was found that the higher UV intensity,recirculating flow rate and UV transmittance of water made UV devices more effective.Based on the experimental data,a bacterial inactivation model of UV light for recirculating systems was presented and the first-order inactivation rate constant was found to be 0.0062 m2/J for UV inactivation of fecal coliform.Simulation results indicated that,for disinfecting microorganisms with a lower inactivation rate,increasing UV intensity was more effective than increasing daily cycle number.The obtained results could be used for design and operation of UV inactivation in recirculating aquaculture systems.

关 键 词：紫外线 模型 菌类 水 杀菌 循环水系统 

分 类 号：S969[农业科学—水产养殖]