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关于免煮米饭的问题

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发表于 2022-3-16 21:55:43 | 显示全部楼层 |阅读模式

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目前市面上能够买到的免煮米饭都是重组米,保质期一般在1年左右
然而山之厨保质期能达到3年,山屋甚至能达到几十年,此二者均使用了冻干技术保存
有人知道两个技术在口感,成分,营养,冲泡方式(能否冷水冲泡),以及能否单够买冻干大米吗?
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发表于 2022-3-17 13:19:55 来自手机 | 显示全部楼层
关于免煮米饭的话,首先它不一定是重组米。
然后是山屋的冻干技术,其实冻干技术应用在食品行业已经很多了,但成本比较高,一般利用在高净值食品比如水果干之类。单独冻干米饭的话应该不会有。
关于技术方面,冻干技术可以去看《食品工艺学》这本书,方便米饭可以去看 《方便米饭加工原理与技术》ppt,网上就有。
然后关于山屋的保质期,保质期一般会经过加速实验得到。我个人估计可能它除了冷冻干燥以外还用了其他技术,或者是对保质期的定义不同。
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发表于 2022-3-17 15:28:26 | 显示全部楼层
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 楼主| 发表于 2022-3-17 18:14:50 | 显示全部楼层
https://www.thepurposefulpantry. ... -with-a-dehydrator/ 这里给出了一种DIY的可能
参考《方便米饭加工原理与技术》ppt,采用热风干燥(即dehydrator)的方式似乎是可行的?
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 楼主| 发表于 2022-3-17 18:18:52 | 显示全部楼层
https://backpackinglight.com/forums/topic/10946/ 中 Kathleen B 提到一种只需要烤箱的方法,是否可行?
附一下原文:


Last night, following Sarah's directions, I cooked 1 C of brown basmati rice, which weighed 5 oz., in my rice cooker and then spread it on a cookie sheet and put it in the oven set to "warm" for the rest of the evening. The wooden spoon to prop open the oven door was a bonus great idea! Twice I pulled out the cookie sheet and crumbled the drying rice. Around 10 pm I turned off the oven and left the cookie sheet in the oven until this evening. The rice was crispy dry.

The dried rice measured 10 oz. in volume, instead of the original 8 oz. as raw rice, and it still weighed 5 oz. I put 1/4 C in a ziploc bag and added 1/4 C boiling water and waited 15 minutes. It was still a bit crunchy, probably because brown rice in general takes more water to cook, so I added 2 TB water and microwaved it to finish cooking. Next time I'll know to use 1.5 times the amount of water to brown rice when I reconstitute it. The taste and texture were as good as freshly cooked.

Since I really like brown basmati rice, and I don't care much for instant white rice, this procedure has at last made it more likely that I'll make rice dishes on backpacking trips.

As for George's question about when to add the olive oil, it probably doesn't matter, but I will add it to the dry rice, just as I would add oil to raw rice when cooking it at home.

Another instant evergreen, Sarah!
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发表于 2022-3-17 18:38:37 来自手机 | 显示全部楼层
qwert 发表于 2022-3-17 18:18
https://backpackinglight.com/forums/topic/10946/ 中 Kathleen B 提到一种只需要烤箱的方法,是否可行?
...

理论上是可行的。
带有内置风扇的烤箱与家用的热风干燥机结构相似,工作原理类似。利用比较低的温度理论上是可以起到一样的作用的。
作者似乎使用了135-145℃的温度,这个对于热风干燥的温度来说是偏高的,一般会在90℃以下,防止在降速期食品表面失水过快造成复水性不好。
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