Differenziamo tutto prima del conferimento.

Not exactly. In everyday Italian, differenziare often means to sort/separate by type, especially with rubbish or recycling.

So in a waste-disposal context, differenziamo tutto means something like:

• we sort everything
• we separate everything properly
• let’s sort everything

It is related to the idea of making things different/separate, but in this context it is specifically about separating waste into categories.

Differenziamo is the 1st person plural form of differenziare:

• io differenzio = I sort/separate
• tu differenzi = you sort/separate
• noi differenziamo = we sort/separate

So grammatically it means we separate/sort.

However, this same form can also function as an imperative/exhortation:

• Differenziamo tutto! = Let’s sort everything!

In a slogan, sign, or public-information sentence, Italian often uses this form in a slightly general or exhortative way.

Yes. Italian often leaves out subject pronouns when the verb ending already makes the subject clear.

So:

• Differenziamo tutto
  means
• Noi differenziamo tutto

But noi is normally omitted unless the speaker wants emphasis or contrast.

Because tutto here is being used as a pronoun meaning everything.

Compare:

• tutto = everything
• tutti = everyone / all of them / all (masculine plural)

So:

• Differenziamo tutto = We sort everything

If you said tutti, it would no longer mean everything in the same way.

Prima di means before.

When di is followed by the masculine singular definite article il, they combine:

• di + il = del

So:

• prima del conferimento
  literally = before the depositing/disposal

This contraction is very common in Italian.

Italian often uses the definite article where English might not.

So del conferimento literally means of the disposal/depositing, but in natural English we would usually just say:

• before disposal
• before collection
• before throwing it away

The article sounds normal and expected in Italian in this kind of phrase.

Conferimento is a fairly formal word. In waste-management language, it refers to the act of placing, depositing, or handing over waste for collection/disposal.

In simpler everyday terms, it is the stage when the rubbish is put out, taken to the bin, or delivered to the collection point.

So prima del conferimento means before putting it out for collection/disposal.

It is common in official, municipal, environmental, and recycling-related language, but it sounds more formal and technical than ordinary speech.

In everyday conversation, people might say things like:

• prima di buttare tutto
• prima di portarlo fuori
• prima di metterlo nel bidone

But on signs, notices, or recycling instructions, conferimento is very natural.

That is a very normal word order in Italian.

The sentence is structured like this:

• Differenziamo tutto = main action
• prima del conferimento = time phrase

Italian often places time expressions after the main clause, especially in short informational sentences.

You could also say:

• Prima del conferimento, differenziamo tutto.

This gives more emphasis to before disposal, but the original version sounds very natural.

Yes. Without more context, both are possible.

• As a plain statement: We sort everything before disposal
• As a public instruction or slogan: Let’s sort everything before disposal

In notices and awareness campaigns, Italian often uses this kind of form in a way that feels both descriptive and encouraging at the same time.

It is mostly neutral to formal, especially because of conferimento.

The sentence sounds very suitable for:

• recycling instructions
• municipal notices
• posters
• environmental campaigns

It is not stiff or unnatural, but it does sound more like public-information Italian than casual everyday conversation.