微波大米杀虫技术.doc

Industrial Microwave Disinfestation of Rice工业微波大米杀虫大米是世界上最重要的人类主食，特别是亚洲、拉丁美洲和西印度群岛。在大米储存过程中，虫害是米商所面临的最为严重的问题。虫害造成大米重量减少，品质降低，并带来食品安全问题。传统用于控制虫害的方法是采用溴化甲烷或三氢化磷等化学药品对大米进行熏蒸处理。使用溴化甲烷的最大弊端在于臭氧消耗。根据蒙特利尔议定书，这种化学熏蒸方法在2015年前将在全球范围内逐步进行淘汰。使用三氢化磷熏蒸消毒剂的时间相对较长，增加了耐虫性，难以控制。另外，化学熏蒸的残留物给人类健康产生的巨大威胁也令人担忧。工业微波（频率：2.45GHz）以其快速、连续、安全（非化学应用）及绿色环保的方式取代化学熏蒸法。耦合的微波能量使大米内的水分子剧烈运动，并产生热能，从内到外整体加热。大米在数秒内迅速升温，所有成虫，甚至虫卵、幼虫及蛹即刻杀死。采用恰当的处理工艺，这种方法可100%杀死虫害。隆泰微波开发的设备确保了功率分布的均匀性，解决了局部过热的问题，工艺的稳定性可实现24小时连续化生产。同时，通过微波热处理，改变了大米的物理化学性能。其感官品质（硬度、起毛现象、咀嚼性等）通常取决于支链淀粉比例、蛋白质含量、游离脂肪酸含量及香味。一般来说，支链淀粉含量越高，蛋白质含量越低，大米的感官品质就越好，因为这样增加了米饭的水吸收及体积膨胀率。通过微波处理，可减少脂肪酶活动，并减缓大米储存过程中游离脂肪酸含量的增长速度，从而保持良好的新鲜度。如今，消费者对环境、健康及感官意识逐步增强。通过微波热处理方法灭虫并提高大米品质将成为全球市场的新宠。Rice is one of the worlds most important staple foods of humanity, especially in Asia, Latin America, and the West Indies. The infestation by rice weevils (Sitophilus oryzae L.) is one of the most serious problems faced by millers on rice storage, which leads to weight loss, reduced quality and food safety issues. The traditional practice used to control the weevil infestation is treating rice with chemical fumigation using Methyl Bromide or Phosphine. The major drawback of using Methyl Bromide is its significant contribution to ozone depletion, and it will completely global phase-out under Montreal Protocol by 2015. Disadvantages of using Phosphine fumigant is relatively long time and increasing insect resistance which could cause control failure. Besides, residues of chemical fumigation bring to tremendous hazard to human health is also concerned.Industrial microwave operated at a frequency of 2.45GHz is used as a rapid, continuous, safer (chemical-free) and greener method to replace chemical fumigation. The coupled microwave energy vibrates the water molecules of rice extremely fast and converts this energy into frictional heat volumetrically from inside out. The rice temperature is elevated rapidly in seconds to above a certain lethal level to kill all the adult weevils, and even the eggs, larvae, and pupae. This disinfestation technique can achieve 100% mortality by proper process configuration. SYNOTHERMs microwave system design ensures the uniformity of power distribution to eliminate overheating problem, and the process stability provides 24 hours non-stop production. At the same time, microwave heat treatment also changes physicochemical properties of rice that improves the sensory quality of cooked rice. The sensory quality (hardness, fluffiness, chewiness, etc.) is often attributed of amylose to amylopectin ratio, protein content, free fatty acid content and aroma. Commonly, the sensory quality is better when the amylose content is higher and protein content is lower, which consequently increase the water uptake and volume expansion ratio for cooked rice. This can be achieved by microwave treatment. Microwave treatment also slows down the increased free fatty acid content during storage by reducing lipase activity, so that to keep a better freshness of treated rice.The trend for consumer awareness of environmental, health, and sensory concerns has been increasing in nowadays. The application of microwave heat treatment for disinfestation and improved rice quality will definitely meet a huge global market demand. 微波大米杀虫设备优势：运行成本低快速均匀加热（杀虫时间少于2分钟）连续式批量加工取代化学熏蒸方法，安全有效避免食品安全及环境污染问题瞬时开/关操作，无热惯性节约占地面积温度/功率自动控制24小时连续不间断工作提高大米感官品质The advantages of SYNOTHERMs microwave disinfestation system: - Very low operation cost - Rapid and uniform heating (disinfection time less than 2 min) - Continuous process allows large throughput - Safe and competitive alternative method to chemical fumigation - Avoid problems of food safety and environmental pollution - Instant on/off operation; no thermal inertia - Saves installation foot-print - Automatic control of temperature/power - 24 hours non-stop operations - Improved sensory quality of rice技术参数：微波频率：2450 25 MHz磁控管冷却方式：水冷电源电压：3相，380 10V运行温度：55-65进料装置：斗式提升机产量：6-12吨/小时冷却装置：旋转式冷却水机大米输出温度：35-40微波泄漏水平：正常运行情况下，大米表面泄漏值 1mW/cm2温度控制：PLC控制耗电量：约50 J/gTechnical Specifications:-Microwave frequency: 2450 25 MHzMagnetron cooling: Water-cooledPower supply: 3 phase 380 10VOperating temperature: 5565 oCFeeding device: Bucket elevatorCapacity output: 612 tonne/hour of riceCooling device: Rotary water coolerRice output temperature: 35-40 oCMicrowave