|Pasteurization has been listed as a level-3 vital article in Technology. If you can improve it, please do. This article has been rated as B-Class.|
|WikiProject Food and drink||(Rated C-class, High-importance)|
|Wikipedia Version 1.0 Editorial Team / Vital|
|A fact from this article was featured on Wikipedia's Main Page in the On this day... section on April 20, 2008 and April 20, 2009.|
- 1 I think that it has some useful info
- 2 "Controversy" section
- 3 !!! There are meny nonsenses in this text
- 4 Should it be -ize or -ise?
- 5 Photo
- 6 Flash Pasteurization
- 7 "Alternative pasteurization standards and raw milk" : Biased?
- 8 More referenced in raw milk ?
- 9 POV
- 10 Raw Milk
- 11 Reverted
- 12 Proposal to remove most of the raw milk debate
- 13 Rewrote raw milk debate
- 14 Requested move
- 15 Facts Wrong?
- 16 copied
- 17 Not copied
- 18 Temperature Conversion Error
- 19 Crab
- 20 Article lacks basic info. Too much info about milk.
- 21 Raw Vs Pasteurized: Not that big of a difference?
- 22 Merge to UHT section
- 23 Added POV-Section tag
- 24 Article needs a re-write
- 25 What is pasteurization?
- 26 Alternative theory
- 27 Recent Changes
- 28 Pronunciation
- 29 Needs editing for clarity
- 30 Moved from 2007 Update
- 31 Repasteurization Internet rumour
I think that it has some useful info
I think that it has some useful info, and it is a great homework help. Though there can be such a thing as too much info...
There is also such a thing as skimming.there are different types this article is not just written for school kids
There is no mention of what pasteurization does to the nutritional content.
—Preceding unsigned comment added by 188.8.131.52 (talk) 06:49, 13 October 2007 (UTC)
Multiple users have commented on the inappropriateness of this section, especially in this particular article, which about more than milk. Therefore, I deleted the section from this article and moved it to United States raw milk debate.
Advocates of The Weston A. Price Foundation's Campaign for Real Milk seem to be using wikipedia to futher their agenda. Links to their site and articles (on other matters as well) are all over wikipedia (see my recent edits for some). I don't believe the "debate" page is encyclopedic, but it's a good place to consolidate their unsubstantiated claims about raw milk. Oddly, the WAPF wiki article does not yet mention its raw milk campaign. OccamzRazor 22:47, 6 November 2007 (UTC)
!!! There are meny nonsenses in this text
like: "HTST involves holding the milk at a temperature of 720 °C (1610.5 °F) for at least 15 years. UHT involves holding the milk at a temperature of 1038 °C (280 °F) for at least two seconds." ghhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh,jh,hvj,hvjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj,
Should it be -ize or -ise?
All the words ending -ize in the article were changed to -ise by the user 0s1r1s with the edit summary Changed from U.S. English to International English. Title needs correcting.
It is incorrect to think that the -ize suffix is an Americanism (see Wiktionary) and it is in fact the recommended spelling by most British dictionaries including Chambers and the Oxford English Dictionary. Wikipedia's article on International English describes three different types of International English: British English with -ize spellings; British English with -ise spellings; and American English - two of the three types of International English use -ize. Should the -ise spellings in the article be changed back to -ize, or should the whole article be moved to Pasteurisation (it would be confusing to leave as it is, with the heading differing from the main body of text). Ukeu 14:09, 26 July 2006 (UTC)
- Unfortunately, international English is the English recognised by most dictionaries, except in the U.S. (notice recognised, not -ized). The title will be changed accordingly, after research from five very respected dictionaries from both the United Kingdom and my home country Australia. —The preceding unsigned comment was added by Auroranorth (talk • contribs) 11:01, 12 February 2007 (UTC).
- This topic definitely needs further exploration. It's not sensible to use Wiktionary as a source here, partly because it would present a conflict of interest, and partly because the article at Wiktionary is without sources itself. Also, I failed to see "three different types of International English: British English with -ize spellings; British English with -ise spellings; and American English - two of the three types of International English use -ize." at International English. I would like to see some evidence on the Oxford recommending the use of the -ize suffix. Much of the body of the article Louis_Pasteur uses -ise. Perhaps this should be reviewed?
The article on Flash pasteurization describes the method as using temperatures between 71.5-74ºC and durations between 15 and 30 seconds. But the widley-used HTST method described in this article uses a temperature in that range (72ºC) and a time of 15 seconds. This article also claims the following:
- A newer method called flash pasteurization involves shorter exposure to higher temperatures, and is claimed to be better for preserving color and taste in some products.
I assume the comparison ("shorter") is to HTST, in which case there seems to be inconsistency between the articles.
"Alternative pasteurization standards and raw milk" : Biased?
This section reads a bit like an anti raw milk pamphlet. Only the third paragraph is dedicated to explaining the benefits of unpasteurized products, and even then, these benefits are referred to as "perceived". The following eight paragraphs detail the dangers of raw milk products and the mere 200-300 people effected every year. Am I imagining the bias? Rachilinie 22:16, 30 September 2006 (UTC)
Actually, what bothered me about that paragraph was its meaningless insertion of '1 in a million'. That is 1 in a million _Americans_ NOT 1 in a million drinkers of raw milk. I'm removing that note because it is actively misleading to give it as a fraction of all Americans (without so noting) rather than as a fraction of raw milk drinkers. --Benjamin Franz 21:25, 24 November 2006 (UTC)
More referenced in raw milk ?
When I read through the article, I thought the raw-milk part was a little caustic, and somewhat biased because the claims were not cited. One even mentioned a guy's name and the CDC, but shouldn't there be a link we can reference, or a journal or time and place to make this more credible?
Also, I was hoping to learn more about the actual difference in taste with pasteurized milk vs. raw milk. I know this is a little biased in nature, but maybe if someone has some concrete examples, it'd be good info to have. Thanks.
Rhetth 12:17, 7 November 2006 (UTC)
Retth, I'm not sure how to provide concrete examples of taste across the web, but I can tell my own experience at least. I grew up drinking about 3 quarts of pasteurized milk a day (in my teen years). A few years ago we switched to raw milk from a local cow owner, and the difference was very definite and obvious. At first I couldn't help tasting a slightly grassy flavor, but I either got used to it or it was a feed problem that the owner figured out and corrected. It wasn't unpleasant anyway, just different. Second, it was Jersey milk, and the cream really does rise so thick you can spoon it out. It's almost as thick as sour cream at times, and yet the texture isn't what you're familiar with from storebought cream. You know how if you take a mouthful of storebought cream it leaves a fatty residue on the roof of your mouth and your teeth, like you tried to gargle with cold lard? Never happens with raw cream - it goes down as smooth as milk, just thicker and creamier tasting. If you don't know the residue I'm referring to, think of homemade ice cream made from storebought heavy cream, it often has that same texture. We skimmed most of the cream and made our own butter: whip it in the Kitchenaid mixer covered with a wet dishtowel for 5-15 minutes, depending on what the cow's been eating, sometimes it goes quicker, and then mash out the buttermilk and wash and mash some more until you can only squeeze out clear liquid. A wooden spoon or a large stiff silicone spatula works well. Save the first batch of buttermilk you pour off for making pancakes - none better. After butter-making, there would be about 1/8-cup of cream left in the remaining 3.5 pints of milk, which we shook up to mix back in every time we poured out milk. I figure that made it about 3.5% milk, but storebought 3.5% milk just isn't even close. The farm milk has a much richer flavor, even after removing most of the cream. Look at Realmilk.com to see if there is a source near you if you want a taste. --DavidJField 08:52, 1 May 2007 (UTC) ojhg
I second the problems with the raw milk section. It is far POV, makes unsubstantiated claims, and uses poor language for an encyclopedia. I'm looking at the end of the first Raw Milk section in particular. Some sources that would be useful in fixing the entire article are cdc.gov and fda.gov. I'm not sure who should be quoted as pro-Raw milk; maybe there is a lobby. Any claim made by either group ideally should be met by a counter-claim if it's disputed.
This entire section should be deleted. It is heavily biased in favor of raw milk, contains unsubstantiated claims, some of which are irrational, and offers no information of use to the dispassionate reader, only opinion. It is also badly written. The science of Pasteurisation is well documented and has been studied for years. Surely you could find a scientist to write this. As a veterinarian, I came to this page to update my knowledge on Pasteurisation since I last studied Bovine medicine 30 years ago. This page is an embarrassment and lowers my faith in Wikipedia as a valid source of information. Hacoah 18:30, 6 December 2006 (UTC)
The edits of 184.108.40.206 23:51, 29 November 2006 gutted any criticism of raw milk and removed references to the CDC and to illnesses caused by raw milk. It reduced an already poorly written article to down right awful. I've reverted back to the version of 15:05, 29 November 2006 CambridgeBayWeather (and trying to put back some of the minor edits re temps and other technical items). I'm sure I missed stuff but it is better than where we were. --Benjamin Franz 17:48, 30 December 2006 (UTC)
Proposal to remove most of the raw milk debate
Having made the reversion yesterday I have continued to think about it more. It is not really appropriate for this article to be 80% about raw milk: The raw milk controversy has its own article. It seems to me this page should be stripped of essentially all the raw milk stuff (perhaps that material should be integrated with the raw milk article) and refocused to solely deal with Pasteurization (as it should) and reference the raw milk controversy by linking back to the raw milk article. Unless I hear some yelps in the next day or so, I'll do that. --Benjamin Franz 15:59, 31 December 2006 (UTC)
Rewrote raw milk debate
I thought the Alternative milk pasteurization standards section read too much like a government pamphlet and didn't fairly present the raw side. Last time I looked at the Raw milk article it needed even more work, so I decided to start here instead. I rewrote this section to focus only on alternative methods of pasteurization instead of including references to raw milk as an alternative _to_ pasteurization. I moved that content to a new section, titled Controversy. I then updated and corrected several parts of that section to be less POV and also include a pro raw citation. --DavidJField 08:18, 1 May 2007 (UTC)
There is something weird about the small history it gives of Pasteurization. It says that it was: "first suggested by Franz von Soxhlet in 1886" yet if you go over to the Louis Pasteur article, it says he and Claude Bernard did the first test of pasteurizing milk in 1862, 14 years before this article states Franz "suggested" it. My research shows that Franz was the one to look into Pasteurization of breast milk, not animal milk.—Preceding unsigned comment added by 220.127.116.11 (talk • contribs)
this is another copied article. none of this information is origional. it was all taken from allexperts.com this is the link to the origional article. http://en.allexperts.com/e/p/pa/pasteurization.htm
Actually it was allexperts.com, the commercial enterprise, that did the copying, not the many volunteers at Wikipedia! Read the small print at the bottom of the allexperts page - "This is the "GNU Free Documentation License" reference article from the English Wikipedia. All text is available under the terms of the GNU Free Documentation License. See also our Disclaimer." (In which the phrase "reference article from the English Wikipedia" is a link to this article.) --DavidJField 05:18, 1 May 2007 (UTC)
Temperature Conversion Error
"UHT processing holds the milk at a temperature of 138 °C (250 °F) for a fraction of a second."
These temps make sense if 100 °C = 212 °F and each unit is the same quantity, but they're not. So 138 °C = 280 °F (or 250 °F = 120 °C). It would be best to go back to the source...
Jpvinall 02:32, 16 August 2007 (UTC)
I added the crab bit because Dirty Jobs had someone (a worker) at a crab... place saying they pasteurize crab. Like first it's put through a, not really a blender but a crusher thing and made into a mush stuff, then pasteurized for crab soup, cakes, whatever they want to fill things with. And sorry I wasn't signed in. This thing signs me out even if I click to leave me signed in. .-. -Babylon pride 23:46, 16 September 2007 (UTC)
Article lacks basic info. Too much info about milk.
Pasteurization is a process that finds applications in not only food preparation, but also mushroom cultivation, Horticulture, and biology (and possibly elsewhere.) Pasteurization is often applied because some beneficial micro-organisms can survive this process, as opposed to sterilization which basically kills everything. Of course it is also used to sanitize substances that cannot be heated beyond certain temperatures, cannot be autoclaved, or cannot be treated with chemicals.I believe, though I am not sure, that pasteurization can be used on dry solids. Never the less, pasteurization IS used on wet solids, for example wet soil, wet grains, wet vermiculite etc. -Matt Munson Oct 13 2007
Raw Vs Pasteurized: Not that big of a difference?
I think this whole debate about raw vs pasteurized is being debated by people from two extremes, whereas a well informed person would probably be somewhere in the middle. On the one hand science acknowledges the existence of beneficial bacteria. Everyone has them growing in their stomach, even before they are born. In fact, humans are a construct of many different organisms including fungi and bacteria. Science also acknowledges the fact that by eating certain foods that contain these beneficial bacteria, we can improve our over all health. However, I do not know how much of these bacteria we miss out on, if any, due to the pasteurization of milk. Other foods, such as yogurt are already known to contain high concentrations of these beneficial bacteria.On the other hand, the only two purposes I know of for the pasteurization of milk are to preserve it as long as possible and to make sure that no harmful organisms are present. Clearly preserving milk is a benefit to society, as it decreases waste, thereby increasing the efficiency of our production. Eliminating pathogenic bacteria would at first seem like only a good thing. However, there is scientific evidence, that being exposed to more pathogens in your life, especialy during developmental stages, will increase the strength of your immune system. In other words, someone who is almost never exposed to pathogens will have almost no defense against them. Clearly, individuals with depressed immune systems (babies, AIDS patients etc.) should only drink pasteurized milk. For the rest of us, there is no reason why we cant make an informed decision about what we put in our bodies. Although if raw milk where to be made available from major distributors, it would surely cost much more than pasteurized milk, due to the shorter expiry time, little consumer demand (less people buy so it would have to cost more to get a profit) and high tech facilities that would probably be needed to keep the milk from being exposed to too many pathogens... Just some food for though, for anybody that can actually write well enough and has the time enough to research this well enough, to actualy edit the entry. - Matt Munson oct 13 2007
Merge to UHT section
I oppose: pasteurization seems to be a process which REQUIRES refrigeration afterwards, UHT milk can be put in tetra-paks and kept for quite a while longer and without refrigeration. This kind of milk is not that common in the US because marketers found Americans didn't want to buy unrefrigerated milk, but in Europe, it's not hard to find, on shelves and also in the refrigerated section.
I could be wrong about this, but I've never seen simply pasteurized milk in a tetra-pak on a shelf, I don't think it would keep. These two are different things. Semodisesamo (talk) 21:02, 4 January 2008 (UTC)
- NOt wrong, it shouldn't be merged, these are 2 very separate processes, and not the same thing. ~~ —Preceding unsigned comment added by Pschemp (talk • contribs) 14:20, 6 January 2008 (UTC)
- Oppose merge - As previously mentioned, these are two separate processes. Further, the editor who placed the tag two months ago never provided a rational for merging. It would have been helpful to know their opinion. Two months, unanimous opposition and no interest in the merge... I'm pulling the tag. AlphaEta 04:01, 7 January 2008 (UTC)
December 11/08 - Please expand this article. It does not talk about other pasteurizations like orange juice or grape juice. I am interested to know what kinds of juices and other liquids are pasteurized at. Thank you. —Preceding unsigned comment added by 18.104.22.168 (talk) 19:40, 11 December 2008 (UTC)
Added POV-Section tag
I added a POV tag to the milk tag since the concerns above seem to not be addressed. It talks about "growing research" re: raw milk, but points to an obscure book, not primary or scientific sources. IanBushfield (talk) 18:22, 12 September 2009 (UTC)
Article needs a re-write
For an article about a process, this contains precious little information about that process. Nobody could read this article and emerge with a knowledge of pasteurization, hence we fail at being an encyclopedia! This cannot be tolerated. Wayne Hardman (talk) 01:14, 28 December 2009 (UTC)
What is pasteurization?
- It may benefit you to read what Wikipedia is not as you will discover, amongst other things, that Wikipedia is not an instruction manual. LittleOldMe (talk) 21:38, 13 February 2010 (UTC)
- Indeed, Wikipedia is not an instruction manual; however, I still believe a brief description of the methods of pasteurization would be appropriate. It is only halfway through the article that we discover that heat is involved in this process. The process is briefly described for milk, but is there not a general process? Also, this sentence is quite misleading : "Pasteurization means heating water up to 80 degrees Celsius." I used Wikipedia to make sure I was using my semicolon correctly. Does that make Wikipedia an instruction manual? I don't mean to be rude or anything. I just think this article is missing quite a bit of information. Fredthebass (talk) 03:03, 15 February 2010 (UTC)
actualy I have an alternative theory for any science buffs as to what your seeing and pasteur may have been incorrect.
I believe that may not be looking at micro-organizms growing on wine and pasteur made an easy mistake. I dont doubt microbes exist (thiers microscopic evidence to show living micro-organisms in blood for example) not to come off as a quack, this is just not the case for wine and fruit juices as well as milk (milk has water as well as protiens etc.) or any liquids with a water based content that are not water should be classified as semifluids/solids. What pasteur saw I believe can be easily explained as the process of evaporation of semi fluids. Because wine has grape pulp and water (fruits have water content), water is the first thing to evaporate, leaving the grape pulp remains. I believe this is the scummy residue pasteur incorrectly thought was "micro-organisms" he was simply seeing the wine evaporate, the water content evaporates first leaving the grape pulp remains and they also become gaseous and decompose do to heat. Discoloration is due to the chemicals in the water/fluid content of the wine/grape evaporating causing the wine to change color as the chemicals that leave it and also when something is heated it changes color when cooked/heated (becoming darker). The reason refrigeration keeps the wine from "spoiling" is because it stops evaporation, the colder anything water based is the longer it will last. A simple test proving this can be done in temperature conditions predicting "microbial" growth, the colder the temperature the less "microbial growth", the higher/warmer the temperatures the faster the microbrial growth showing that your not looking at microbes eat the wine your simply looking at the wine decompose and become gaseus through natural process of evaporation. the microbes/scummy residue your looking at are simply the grape pulp decomposing and becomeing gaseus after the water in the wine evaporates. the same thing happens when you cook pancakes, pancake batter is a semi fluid, heat causes the water content to evaporate first changing the "batter" into the bread. if you cook it any longer than normal it will burn up and become gaseous, both solids and liquids become gaseous when heated, liquids will become gaseous at lower temperatures, solids take longer unless higher temperatures are used.
I also believe the same thing is true for "mold" growing on fruit, your actualy just seeing the water evaporate and chemicals out of the fruit in the water changing the color and darkening the fruit.fruit decomposes as the fruit becomes gaseous. So when you see fruit rot your just looking at decomposition and the fruit becoming gas, not mold/something growing. This is why smells generaly accompany moldy or spoiled food, your smelling the food become gaseous. fruits also last longer refrigerated because anything with water based content lasts longer the colder it is. This means mold is not "growing" on bread or fruits, simply bread has small amount of water content to it and as the chemicals in bread leave through evaporation as well as your simply watching the bread become a gas as both liquids and solids evaporate through heat. So esentialy bread and fruits evaporate if you want to look at it like that over time in warm conditions lol. This also easily shown you should be able to put bread in the freezer and prevent completely "mold" growing as again foods because of small amount of water content last longer frozen. humans and animals also decompose and become gaseous over long periods of time of course not to sound morbid. LOL. In my opinion fruit stops growing when it is removed from the vine wich is why it has a limited shelf life. another test would be to heat win this in an temperature controled heated airless invironment (room temperature or warmer), obviously if your looking at microbes you wont get microbial growth from the wine pulp (microbes wont grow in an airless invornment), im betting that the wine will evaporate showing the same scummy residue normaly in airless conditions still leaving the "scummy microbial residue" showing your looking at grape pulp in the wine become gaseous as it decomposes, not microbial growth as microbes would not grow in an heated airtite invoronment. the reason this research would be important is in cases of contaminations like typhoid fever (caused by spoiled fruit drinks) and salmonella, these may be misclassified and are poisions/poisioning as it also shows that liquids that are not water would change thier chemical state and the gradual heating and decaying through evaporation is what creates the poision in the case of milk etc. not because of micro-organisms. poisioning causes simliar symptoms as the flu. whats most likely happens is temperature causes the milk and other organic fruits as well to change its chemical structure as liquids are evaporated from it during the heating process. in the case of pasteurization for milk, poisionous chemicals are evaporated out of the milk during pasteurization. however gradual heat can actualy cause noxious and poisionous chemicals to form as chemicals leave milk as well as certain fruit juices. alot of what i see on youtube videos as "growing" looks more like excreetion of chemicals as fruits rot and decompose, chemicals are excreeted and the pulp and solids are visibly seen as the liquid/water content is the first thing to evaporate in milk/fruit juices.
It appears that you gents as well as pasteur are unaware that solids are capable of evaporation over time, to also prove it leave a piece of bread out (up high not to attract mice) you'll generaly notice in 3 or 4 weaks the bread is no longer thier in my opinion do to evaporation and simply the bread becoming gaseous through gradual heat not micro-organisms eating the bread. metals last the longest out of solids wich is why recycling is important. you should be able to see the same process by vacumme sealing fruits/breads and heating them showing that micro-organisms are not eating the foods, thier simply decomposing and becoming gaseous do to heat (extreeme cold can do this as well).
—Preceding unsigned comment added by Alanfunkle (talk • contribs) 14:43, 28 August 2010 (UTC)
- Microbes in wine? Wine (and even small beer) contains enough ethanol to prevent most microbe growth. It is suspected that this is a primary reason for the popularity of alcoholic beverages;  even if most water sources are not safe to drink from, beer is mostly harmless. Desirable yeast colonies might survive fermentation, but brewer's yeast is bred to survive just until it produces the expected final ABV.  Yeast growth is self-limited by its own excreted alcohol  and no yeast will survive in 25% ABV,  although some strains can get close to that. 
- Wine is refrigerated (or at least kept somewhere cool) mainly to slow chemical reactions, which can corrupt flavor in various ways.  Cool temperatures also tend to disfavor unwanted compounds going into solution and becoming detectable.  Bottled wine does not spoil for any other reason.  Bag in box wine will not spoil readily (even after opening it has less direct exposure to air)  but some chemicals that glass keeps out [which?] will leach through plastic. 
Changed section title from "effectiveness of pasteurization" to "effect of pasteurization." Effectiveness refers to whether or not it works, effect refers to how it works. I also made it more balanced, because it kinda sounded weighted by the pro-pasteurization association. I pointed out that it stifles cheese production (and is probably designed this way), since it kills most bacteria, not just the bad stuff. Bulmabriefs144 (talk) 04:06, 26 October 2010 (UTC)
Where does this pronunciation come from? I for one have never heard the word said with a an /ɑ/. — trlkly 03:51, 8 June 2011 (UTC)
Needs editing for clarity
Guys, this is kinda silly, but toward the end of the first paragraph under the "Pasteurization of milk" heading, read the following words: "...as a result milk is now widely considered to be one of the safest foods."
Okay, I could get with that if it weren't for:
"...making it one of the world's most dangerous food products." At the end of paragraph five under the SAME HEADING! LoL.
RE: "Needs editing for clarity"– The end of the first paragraph talks about pasteurized milk, while the fifth paragraph talks about raw milk. It's written pretty clearly. 22.214.171.124 (talk) 03:32, 9 October 2013 (UTC) — Preceding unsigned comment added by 126.96.36.199 (talk) 03:19, 9 October 2013 (UTC)
Moved from 2007 Update
Repasteurization Internet rumour
There is a rumour going around the internet (at least in emailing lists I'm in...) that if milk cartons are not sold at supermarkets within their expiry dates, they are taken back to the factory/dairy farm and repasteurized. According to the email this is allowed by law to happen up to five times (after that the taste of the milk has changed from the desirable), hence the number (1-5) that can be found printed/pressed at the bottom of the carton. Industry people however say that the number at the bottom signifies the number of the machine that was used to put milk in the carton (so that in the extremely rare case of carton recall they can find the machine that has the problem, plus inform the public by using the number). So my question is: Can you repasteurize milk? My logic dictates to me that if milk has passed its expiry date it can not be saved. If anyone knows for sure I think this info could be added to the article (as trivia or something like that I suppose). Thanx. Kalambaki2 20:51, 30 June 2007 (UTC)
This rumor is obviously false. Firstly, it would not be at all profitable to have the expired milk shipped back to the plant, and then somehow screened to tell which milk was still good and which was not. Even if it was economical, theres no way that milk companies could get away with that without everyone knowing about it. It's common knowledge that milk usually still tastes fine after the expiry date. This is especially true if the milk has not been opened or removed from refrigeration. No matter how bad the milk has gone it would still be possible to repasteurize it, since pasteurization is simply a process for killing off micro-organisms. Of course any souring that had already occurred before the pasteurization would not be reversed, since the souring of milk is caused by chemical changes ,brought on by the presence of too many of the wrong kinds of micro-organisms. I would be more specific but I really dont have that knowledge. Suffice to say it probably has something to do with bacteria, yeasts, or molds feeding on the milk and excreting nasty bi-products. Matt Munson Oct 13 2007
- Really? http://www.leginfo.ca.gov/cgi-bin/displaycode?section=fac&group=35001-36000&file=35831-35834 "Repasteurized milk may only be reprocessed and sold as a
"Grade A" product under the following conditions and restrictions:.......... (2) Equipment, designated areas, or rooms utilized for handling, processing, and storage of returned packaged milk or milk products.......The repasteurization of milk and milk products shipped in milk tank trucks, which have been pasteurized at another Grade A milk plant and have been handled in a sanitary manner and maintained at 45 degrees Fahrenheit (7 degrees Celsius) or less, is permitted.." And the US Army reported that re-pasteurized milk was not fit for the troops :http://cdm15290.contentdm.oclc.org/cdm/ref/collection/p15290coll6/id/1301 and and interesting reason why milk shipped to Hawaii is re pasteurized http://archives.starbulletin.com/2006/10/08/news/kokualine.html188.8.131.52 (talk) 00:11, 27 November 2013 (UTC)