peteubyeongeun jaehwaryongpumeuro ttaro mo-eupnida.

페트병 means PET bottle, and in everyday Korean it usually refers to a plastic drink bottle.

• 페트 comes from PET: polyethylene terephthalate
• 병 means bottle

So although an English speaker might naturally say plastic bottle, Korean often uses 페트병 very specifically for this kind of recyclable bottle.

은 is the topic marker. It sets 페트병 as the thing being talked about: As for PET bottles, ...

Even though 페트병 is also the thing being collected, Korean often uses the topic marker in general statements, rules, or instructions instead of the object marker.

So:

• 페트병은 재활용품으로 따로 모읍니다 = As for PET bottles, collect them separately as recyclables
• 페트병을 재활용품으로 따로 모읍니다 would focus more directly on PET bottles as the object

Using 은 sounds very natural in notices or sorting instructions.

Yes, it can.

은/는 often suggests a contrast like as for X... In a recycling context, that can imply something like:

• PET bottles should be handled this way
• other items may be handled differently

So the sentence can carry the feeling of PET bottles, unlike some other trash, are collected separately as recyclables.

That contrast does not have to be strongly emphasized, but it is a common nuance.

재활용품 means recyclables or items for recycling.

It is made of:

• 재활용 = recycling, reuse
• 품 = item, goods, article

In this sentence, it does not mean finished products made from recycled material. It means the category of things that should go into recycling.

Here 으로 shows the category/status/treatment of the item: as recyclables.

So 재활용품으로 따로 모읍니다 means something like:

• collect them separately as recyclable items
• sort them separately into the recyclables category
• collect them separately for recycling

This is one of the many uses of 으로. It does not always translate neatly as just to or with.

따로 means separately, apart, or on its own.

In this sentence, it tells you that PET bottles should not be mixed together with other trash. They should be sorted out into their own group.

So:

• 따로 모읍니다 = collect separately
• without 따로, the idea of separate sorting would be weaker or missing

The subject is omitted because Korean often leaves out subjects when they are obvious from context.

In a notice, instruction, or guideline like this, the understood subject is usually something generic such as:

• people
• residents
• we
• you

So depending on context, the sentence can feel like:

• PET bottles are collected separately as recyclables
• Please collect PET bottles separately for recycling
• PET bottles should be collected separately as recyclables

Korean often leaves that unstated.

모읍니다 is the formal polite present form of 모으다, which means to collect or to gather.

This style is common in:

• public notices
• instructions
• official information
• signs

In English, it may be translated as a simple present, but in context it often sounds like a rule or instruction rather than just a description of what is happening right now.

The sentence breaks down like this:

• 페트병은 = as for PET bottles
• 재활용품으로 = as recyclables / into the recyclables category
• 따로 = separately
• 모읍니다 = collect

So the literal order is:

As for PET bottles, as recyclables, separately, collect.

This reflects normal Korean word order, where the verb usually comes at the end.

Yes. Even if the literal structure is different, natural English translations include:

• PET bottles are collected separately as recyclables.
• Collect PET bottles separately for recycling.
• PET bottles should be separated and collected with recyclables.

Which one sounds best depends on whether you want the sentence to sound like a statement, a rule, or an instruction.