can you kill bacteria by freezing? or just boiling?

@bulastika (5967)
Philippines
December 8, 2009 6:03am CST
Hi guys! I have a problem, cause be boiled our drinking water to kill bacteria and some if not all harmful germs.. But my brother love to put ice cubes on his drinks. But my concern is what the point of boiling the water if the ice that he used is not boiled.. He said that the ice is frozen so the bacteria is dead.. I use the boiling point He use the freezing point to kill bacteria and germs.. Is that true? you can kill bacteria by freezing? or boiling is the only method that can kill bacteria and germs?
2 people like this
18 responses
• India
9 Dec 09
boiling water at 100 degree celcius will kill almost all the bacteria in the water.That's what i' ve been taught in school.Nowadays water purifiers are available for cheap price..so it is better to have a purifier instead of boiling the water.
@bulastika (5967)
• Philippines
10 Dec 09
Actually we buy distilled water. but we boiled our water sometimes when we forgot to buy. but my concern is what the use of buying distilled water or boiling our tap water if you go to your neighbor and buy ice cubes..
• India
15 Dec 09
how will you drink the water if you freeze it! Boiling is much better.
@bulastika (5967)
• Philippines
15 Dec 09
I'm sorry I don't get you this time. What to you mean? that we drink freeze water? I'm mix up with your question but I will try my best to answer it. ..... If your referring to this. We don't freeze up our water.. Yes we put it in a Refrigerator. But not to freeze it just to make it cold. .. We buy ice cube from our neighbor because were saving our refrigerator space. Rather put an ice cube on it we rather want to buy ice cube. .. Then why put ice cube when the water is cold? .. We do put ice on it to maintain the coolness. .. As you know opening and closing the refrigerator door makes the thermostat work over time..and its means more electric consumption and result to high electric bill. .. And also if my brother go to work. He bring his own water. that why he buy ice to keep his water cool. .. Did I answer your you? thanks.
@warvial (1154)
• Singapore
8 Dec 09
Hm... I am not too sure whether which way works but at my home, we actually used the tap water for the ice cube and so far, nothing happens so I guess it's not harmful for the health (if that's what you are hoping to know). But then again, even if you used boiled water to make the ice cubes, in your fridge, are you sure it is bacteria free? Cheers
@warvial (1154)
• Singapore
10 Dec 09
Apologies for not taking into considerations such scenarios. You are right about it. I shall tried to make sure my family changed to using boiled water for ice cubes. Thank you for sharing
@bulastika (5967)
• Philippines
11 Dec 09
That's good, its better to have safe family. We don't know when bad things happen. Its better if we just been prepared.
@Avinigav (238)
• Indonesia
22 Jan 10
Hi, Bulastika! Some bacteria can die at freezing temperature but not like virus. Some virus at freezing temperatur, as I know, come into a "incubation". It make their body inactive, same as die. But when they come into an environment that support their life, it can back to active again. The most way that work is to heat them. Give heat and almost of them die. The amount of bacteria and virus that survive from heat is less than freeze them.
@bulastika (5967)
• Philippines
22 Jan 10
Thank you. Its been awhile since this post have a visitor. Your response give me hope that this thread will comeback again. .. Yeah I also believe that. Heat is still much effective than cold.
@Khushi309 (139)
• India
9 Dec 09
freezing also works for killing bacteria. atleast thats what i have heard... and to be safe, why not fill the ice trays with the water that you boil for drinking? hmm?
@bulastika (5967)
• Philippines
10 Dec 09
So you agree with my brother ha? lolz. Where only buying ice cubes from our neighbor.. That's why. We don't make our own ice cube because of refrigerator space. We rather use the space for food storage than for ice. Beside its much cheaper to buy ice cube and to make one.
@Yaminz (32)
• Malaysia
9 Dec 09
Hot temperature (more than 60 degrees celcius) can kill bacteria likes heating and boiling. Meanwhile, freezing only make bacteria in-active.
@bulastika (5967)
• Philippines
10 Dec 09
Thanks..but I don't agree with the 60 degrees..Even it state more than 60 degrees. I thinks its more than 80 degrees and 10 to 30 minutes of boiling just to be safe. .... yeah I believe that freezing point makes bacteria dormant only.. But if you try to read my post the 50% of the upper thread believes that freezing point do kills bacteria..
@junmae (1562)
• Philippines
9 Dec 09
Some bacteria can be killed by cold temperature but some are. But the effective way of eliminating parasites is to boil them up to 100 degree celcius because even deadly virus cn kill them.
@bulastika (5967)
• Philippines
10 Dec 09
Thanks..Its funny cause this forum is an extension of me and my brother talking (arguing) about freezing and boiling point. 50 percents says its wrong 50 percents says yes its true..lolz..I'm back to square one. Can anybody give me a proof so that I can decide what is the real deal..
• Philippines
9 Dec 09
They usually do is sterilized tools in order to kill microbes or bacteria. So the most effective ways is still boiling for a utensils. But being frozen can make bacteria multiply by means of moistening.
@bulastika (5967)
• Philippines
10 Dec 09
Can I have a unanimous answer please..lolz.. I thought at first when I post this thread that I can have a unanimous answer. But now I'm quite more intrigue. Almost a 50-50 yes or no answer. If I use the probability with percentage of error. Its only means that theirs a 50% chance that my brother is correct also..lolz.
• United States
9 Dec 09
It may kill some bacteria, but doubtful that it is more effective than boiling.
@bulastika (5967)
• Philippines
10 Dec 09
Yeah..So you mean that my brother is also true ha? In his own argumental way.. I can't deny a fact that almost 50% says yes and 50% says no. Even in my own forum the answer is divided..lolz. I guess its safer that we boiled our water but I can't argue with him when he uses ice..grrrr
@evydabest (197)
• Malta
8 Dec 09
Boiling will kill the germs but freezing will not. Freezing will only stop the bacteria from working for a short period of time. By working i mean reproducing and making more bacteria. From what i have heard boiling is a gurantee for killing germs. However there are always those certain types of bacteria (not many though there are) which survive the two extremities. The point is there is always that 0.1 % of bacteria who remain alive, but then is killed by our immune system.
@bulastika (5967)
• Philippines
10 Dec 09
Thanks. I also like boiling. I feel safe if we boiled our drinking water especially if its a tap water. My problem is what the point of boiling the water if you buy ice cube from your neighbor who uses only tap water when making ice cube. But my brother insist that ice cube is bacteria free because of freezing point.
@cupkitties (6144)
• United States
8 Dec 09
I've always heard boiling is the best method. Not sure about the ice cubes though. A nurse told me once I shouldn't take ice in my drinks because it would badly effect my iron levels. Not so sure about that one either.
@bulastika (5967)
• Philippines
10 Dec 09
That's new, I don't know about that nurse, but.. What do ice got to do with your iron level? Its still water only in minus degree Celsius. I think that nurse is only teasing you. .......... Yeah me to..for me boiling is the best way to kill bacteria.. But if freezing is effective as some of this thread says..then its also good method.
@borg246 (541)
• Malta
8 Dec 09
Hey, this is a very interesting question. Yes, it's true both boiling and freezing help to kill bacteria but for food, your should always heat it and in drinks boiling would also be better because by boiling the water and having a container to collect it, when it is being heated, the water is evaporated and can be collected into a container and the germs/bacteria or harmful things that is left in the first container can be disposed of. It's true that both methods can kill bacteria and germs but I believe that boiling is more essential.
@bulastika (5967)
• Philippines
10 Dec 09
Thank you. If you don't mind can you help me out? I just want to have some scientific proof that freezing do kills bacteria. Or is it just your assumption? Cause majority says it does not kill, but minority says that it can be done..I need unanimous answer on this. Theirs only one scientific answer to this one. Cause I already answer each and single one of you. Thanking for your comments.. But I still don't know if my brother is correct or not.lolz
@tictac213 (118)
• United States
8 Dec 09
Hi bulastika! Its a nice and healthy discussion. Well, boiling has always been the preferred method to kill bacteria and other germs, there are some bacteria which cannot be killed by boiling even because such bacteria go into a resistant phase of their lifecycle called spores. But even then its preferred to use boiling method to kill atleast 75 - 80% of bacteria. Freezing might kill some but its not better than boiling. Regarding putting ice cubes of unboiled water, yes it is harmful as bacteria in ice cubes thought they are inactive in ice but once they encounter favorable temperature start their activities very soon and can thus be harmful. Its better if you counsel your brother regarding it or simply ask him to read your entire discussion by mylotters here on mylot ;) i m sure this helps in convinving him ;)
@bulastika (5967)
• Philippines
10 Dec 09
Yeah..but theirs also some who agree that freezing point do kill bacteria.. And if the ice cubes stay in the freezer about two to three hours compare to 10 to 15 minutes boiling time. I don't know really..If only you all have unanimous answers I can happily show them this thread. But some also believe that freezing point do kill bacteria so if theirs a possibility theirs a way..
• Philippines
8 Dec 09
actually freezing cannot kill bacteria but rather only prevent their growth While properly refrigerating and freezing food is an important step in preventing food borne illness, but not kill Food Borne Pathogens(FBPs). Heat is a highly effective way to kill FBPs. When using heat to kill FBPs, it is not only important to make sure the temperature is high enough, but also that the exposure to that heat is long enough. The duration of exposure should be long enough to raise the internal temperature of the food to the relevant degree. According to the National Institute of Health, some appropriate internal temperatures are as follows: 145°F for roasts, steaks, and chops of beef, veal, and lamb; 160°F for pork, ground veal, and ground beef; 165°F for ground poultry; and 180°F for whole poultry.
@bulastika (5967)
• Philippines
10 Dec 09
Thanks..Very informative. I learn something from you today. Where talking about food and bacteria..Can I add a question? How about vinegar? do vinegar kills bacteria? Some food are preserved using vinegar..
@balasri (26579)
• India
8 Dec 09
Cooking alters the protein structure of bacteria.so Since proteins are involved in chemical processes essential for life, changing its protein dooms the bacteria. I the hot springs of Yellowstone and found some strange bacteria .These bacteria like water close to boiling hot. They thrived and reproduced.But enough heat can kill even heat-loving bacteria And Freezing food too doesn't kill bacteria and other harmful microorganisms. It simply inhibits their growth. When you thaw the frozen food, any microorganisms that were present before freezing will start multiplying again. So it is very tough to beat our friend the Bacteria.
@bulastika (5967)
• Philippines
10 Dec 09
Your right. Bacteria only go dormant when its cold..the best way really is to boil the water 10 to 15 minutes just to be safe. Also buy distilled water . I think its much cheaper if you compute the price of the gas and the time you spend on boiling water. Its much comfortable to think that you drink distilled water than a water that has been frozen for 8 hours. ............ About food..Just wondering.. If you put hot food in the freezer why do they spoil? Why do we need to lower the food temperature to room level before putting it to freezer? We have also that rules in our house. Cause if you put a hot food in the freezer it will spoil..
• China
8 Dec 09
i believe that some bacterias will be killed ,but some bacterias are able to resist the freezing and boiling ,their survivors can continue to hurt your body,i always take the water to get reach to the boiling point,though it is trouble
@bulastika (5967)
• Philippines
10 Dec 09
So you mean freezing and boiling has the same effect to some bacteria? So it means that you can also kill some by freezing? I know some bacteria has great resistance but I just can't accept the idea that freezing is same also as boiling in terms of killing bacteria.
@owlwings (33229)
• Cambridge, England
8 Dec 09
Most bacteria are killed by boiling but most are only deactivated by freezing. If the water used to make ice cubes is contaminated when frozen, the bacteria in it will simply start to live their lives again when it is unfrozen. This is why it is unsafe to re-freeze food that has been thawed. If the water used for making ice cubes was good drinking water, then there is no more risk in using them than in using the water as it was but it is quite wrong to suppose that freezing kills bacteria.
@bulastika (5967)
• Philippines
10 Dec 09
Thank you. It just nice that somebody agree with me in this..Cause its hard to explain it here in our house..lolz.. That what I keep on telling them...We buy distilled water but we also buy ice cube that our neighbor sell and knowingly that that ice cubes came from tap water. So what the point of buying distilled water.grr
@becdmd (705)
• Philippines
8 Dec 09
I almost laugh to your post...Well all I know is by boiling or heating can the bacteria die...In terms of freezing I still have no idea about it...uhm...If you want to make sure your drinking water is free from bacteria why not just buy a purifier instead.
@bulastika (5967)
• Philippines
10 Dec 09
That my point..Its useless. We buy distilled water but we also buy cube ice. So what the point..right? buying distilled water when you put a cube ice that you know is only tap water. For me its useless to buy distilled water if we also keep buying cube ice that are made come from tap water.
@kail2001 (250)
• India
8 Dec 09
Hi friend. Just boiling 100 degree for 10 minutes is enough to kill most of the bacteria. I am using boiling method to kill..