Response Surface Modeling and Optimization of Microwave‐Activated Persulfate Oxidation of Olive Oil Mill Wastewater     

Nevim Gen  Elif Durna  Hatice Kübra Kayapinar Cicigün 《洁净——土壤、空气、水》2020,48(1)

Olive oil mill wastewater (OMW) is environmentally hazardous not only because it contains high recalcitrant and toxic compounds, but also due to its high organic load and turbidity. In this study, oxidation of OMW by microwave (MW)‐activated persulfate is investigated. Box–Behnken design is applied to investigate the effects of operating conditions on operating cost, organic matter, and color removal. Multi response optimization is performed according to minimum operating cost, maximum organic matter and color removal efficiencies. At optimum conditions (persulfate anion dose of 266 g L^?1, oxidation duration of 23.58 min, MW power of 567 W, and initial pH 2), chemical oxygen demand (COD) removal of 63.38%, color removal of 94.85%, and operating cost of 0.0633 Euro/g total organic carbon (TOC) removal are found. The biochemical oxygen demand (BOD₅)/COD ratio is increased from 0.144 to 0.285. Results of Pareto analysis show individual effect of MW power is 92.81% for TOC removal, 15.52% for color removal, 68.99% for operating cost, respectively. According to the results, it is not recommended to use this process as an ultimate treatment unit due to the high amount of oxidizing agent consumed. Instead, it is recommended to be used as a pre‐ or post‐treatment step.  相似文献   

White spot syndrome virus inactivation study by using gamma irradiation     

Marzieh Heidareh  Farahnaz Motamedi Sedeh  Mehdi Soltani  Saeed Rajabifar  Mohammad Afsharnasab  Aghil Dashtiannasab 《中国海洋湖沼学报》2014,32(5):1024-1028

The present study was conducted to investigate the effect of gamma irradiation on white spot syndrome virus(WSSV). White spot syndrome virus is a pathogen of major economic importance in cultured penaeid shrimp industries. White spot disease can cause mortalities reaching 100% within 3–10 days of gross signs appearing. During the period of culture, immunostimulant agents and vaccines may provide potential methods to protect shrimps from opportunistic and pathogenic microrganisms. In this study, firstly, WSSV was isolated from infected shrimp and then multiplied in crayfish. WSSV was purified from the infected crayfish haemolymph by sucrose gradient and confirmed by transmission electron microscopy. In vivo virus titration was performed in shrimp, Penaeus semisulcatus. The LD50 of live virus stock was calculated 10 5.4 /mL. Shrimp post-larvae(1–2 g) were treated with gamma-irradiated(different doses) WSSV(10 0 to 10-4 dilutions) for a period of 10 days. The dose/survival curve for irradiated and un-irradiated WSSV was drawn; the optimum dose range for inactivation of WSSV and unaltered antigenicity was obtained 14–15 kGy. This preliminary information suggests that shrimp appear to benefit from treatment with gammairradiated WSSV especially at 14–15 KGy.  相似文献   

利用太阳辐射资料反演宽频上的气溶胶光学厚度   总被引：3，自引：4，他引：3  

杜萍  钱泽雨  陈长和 《高原气象》2002,21(1):79-84

利用晴空无云条件下地面上实测的太阳直接辐射资料，用两种不同的方法反演了宽频上的气溶胶光学厚度，得到了比较一致的结果。从计算方法的比较分析来看，两种方法都是以全波段上的太阳辐射确定宽频上的气溶胶光学厚度为目的。方法I计算简单，但是其中所用的全波段太阳辐射衰减公式比较粗略；方法Ⅱ是确定一最优波长，并以此波长的气溶胶光学厚度作为宽频上的气溶胶光学厚度，在理论上较方法I完善，得到的τa(λ0）也可以得到更多的信息。总之，方法Ⅱ较方法I更合理可行。  相似文献   

中国西部干旱地区各纬度在各种透明度状况下的可能直接辐射月辐照量     

韦志刚  王尧奇 《高原气象》1992,(2)

本文根据中国西部干旱地区太阳直接辐照度随大气质量和透明度变化的经验关系式,计算出纬度φ=28°—50°N,间隔2°,透明系数P_2=0.55—0.85,间隔0.05的可能直接辐射月辐照量。  相似文献   

光照电站边坡位移变形监测研究     

邹广黔 《地理空间信息》2008,6(6):103-106

介绍了贵州省光照电站边坡变形监测设计原则及技术方案,通过光照电站边坡监测结果分析表明：各边坡基本上处于稳定状态,确保了工程的顺利进行。  相似文献   

寡照胁迫对温室番茄开花坐果特性的影响     

张继波  李楠  邱粲  薛晓萍 《气象与环境学报》2022,38(4):85-92

以番茄品种“金冠5号”为试验材料, 利用2015—2019年山东省农科院日光温室中不同层数的遮阳网模拟不同寡照(PAR≤200 μmol·m^-2·s^-1)持续日数(0 d、1 d、3 d、5 d、7 d、9 d), 观测番茄开花后各穗花开花期(Blooming Date, BD)、开花数(Number of Flowers, NoF)、开花率(Flower Rate, FR)、坐果率(Fruit Setting Rate, FSR), 分析寡照胁迫对番茄开花坐果特性的影响, 并基于温光效应(Accumulated Photo-thermal effectiveness, APTE)建立寡照胁迫对番茄开花坐果特性影响的模拟模型, 对其进行验证, 并与PAR日积分法(PAR)构建的模型进行对比。结果表明: 寡照胁迫下, 番茄六穗花开花期不同程度推迟, 尤其是遭受寡照胁迫直接影响的第二、第三穗花开花期推迟最明显, 幅度最大, 持续寡照7—9 d, 番茄第二穗花开花期较对照推迟一周左右; 番茄单穗果实数、坐果率均随寡照持续天数的增加呈降低趋势, 寡照持续时间越长、降幅越大; 基于APTE构建的模型明显提高了寡照胁迫下番茄开花坐果特性的预测精度, 与PAR法相比, 番茄第二、第三穗花BDC、NoFC、FRC和FSRC回归估计标准误差(RMSE)分别降低了25.5%、16.7%、21.2%、23.8%和31.4%、22.4%、25.2%、26.6%。  相似文献   

微波对蚤状搔耐盐性的诱导作用     

王丹丽  陆开宏  徐继林  林霞 《海洋科学》2004,28(3):32-34

在温度25℃±1℃及牛粪 +稻草 +沃土为食物的条件下 ,采用微波辐射方法对蚤状(DaphniapulexLeydig)的耐盐性进行诱导实验 ,观察了分别辐射5,10,15s后蚤状在盐度为2 ,4,6,8,10下的生殖和生存情况。结果表明,经微波辐射诱导后 ,蚤状的生殖上限可从盐度4上升至盐度6 ,在盐度10中最多可存活4h。辐射效果以10s最好。  相似文献   

天然黄玉与辐照改色黄玉的对比研究     

李文侠  李景芝  王安建 《吉林大学学报(地球科学版)》1999,(4)

利用中子辐照改色法把天然无色黄玉改成蓝色黄玉,对天然黄玉和改色后的蓝黄玉分别进行了常规检测、Ｘ－荧光测试、紫外－可见光谱测试及红外光谱测试研究。结果表明：改色前后黄玉的比重、折射率、成分都没有明显的变化;其紫外－可见光光谱、红外光谱存在一定的差异。这些差异为鉴别天然黄玉与辐照改色黄玉提供了依据。  相似文献   

魁蚶雌核发育的人工诱导     

杨青  李琪  聂鸿涛  郑小东  于瑞海 《海洋科学》2011,35(10):11-15

研究了魁蚶（Scapharca broughtonii）雌核发育的人工诱导条件。用强度为2561uw／（cm2．s）的紫外线（254nm）照射不同时间的精子与正常卵子受精,发现随照射时间的增加,卵裂率、早期胚胎存活率和D形幼虫发生率总体呈下降趋势,遗传失活的精子与正常卵子受精后其胚胎发育至D形幼虫前期停止。经紫外线照射...  相似文献   

鱼干中黄曲霉毒素B1的紫外辐照消减技术参数     

王雅玲  叶林  张玮芸  王杏  宋颖慧  邓义佳  孙力军  钟萍 《广东海洋大学学报》2020,(1):69-77

【目的】确定最佳紫外消减条件,并探究此条件下紫外辐照对鱼干品质的影响。【方法】在单因素试验基础上,将黄曲霉毒素B1质量浓度、辐照时间、辐照距离因素进行组合,应用Design Expert软件与Box-Behnken试验原则对AFB1降解条件进行优化。【结果】最佳的毒素降解条件:紫外辐照条件为波长365 nm、黄曲霉毒素B1质量浓度109 ng/mL、辐照距离2.11 cm、辐照时间41 min、pH 7,对AFB1的标准溶液降解率为88.1%。该条件下金鲳鱼干与红鱼干中黄曲霉毒素B1的降解率为90.16%、85.32%,拟合性较好,且该最佳紫外辐照降解条件对鱼干品质并不存在显著影响(P>0.05)。【结论】该研究证明紫外辐照适用于鱼干中真菌毒素的消减。  相似文献