Ovlašćeni centar za sakupljanje će razvrstati opasan otpad.

Serbian does not have articles.

So ovlašćeni centar can mean either the authorized center or an authorized center, depending on context.

If Serbian needs to be more specific, it often uses:

• word order,
• context,
• or demonstratives such as ovaj (this) and taj (that/the in some contexts).

So the lack of an article here is completely normal.

Ovlašćeni means authorized or licensed.

It behaves like an adjective here and agrees with centar:

• centar = masculine
• singular
• nominative

So the form is ovlašćeni to match centar.

Historically, it comes from a participial form, but for a learner it is easiest to treat it as a normal adjective meaning authorized.

Here za means for, expressing purpose:

• centar za sakupljanje = center for collecting / collection center

Sakupljanje is a verbal noun meaning collecting or collection, formed from the verb sakupljati / sakupiti.

After za, Serbian normally uses the accusative in this kind of phrase.
But sakupljanje is a neuter noun whose nominative and accusative singular look the same, so you do not see any visible change.

Because će is a clitic, and Serbian clitics usually go in second position.

That means they come after the first whole sentence element, not necessarily after the first single word.

In this sentence, the first element is the whole subject phrase:

• Ovlašćeni centar za sakupljanje

So će comes right after that:

• Ovlašćeni centar za sakupljanje će razvrstati opasan otpad.

This is normal Serbian word order.

Yes.

You can also say:

• Ovlašćeni centar za sakupljanje razvrstaće opasan otpad.

That is also standard.

A useful rule:

• when the future clitic comes before the infinitive: će razvrstati
• when the verb comes before the clitic, Serbian usually writes them together: razvrstaće

So razvrstaće is fine, but razvrstati će is not the usual standard spelling.

Razvrstati is perfective.

That means it presents the action as a completed whole: to sort / to classify completely.

Its imperfective partner is razvrstavati, which would focus more on:

• the process,
• repetition,
• or an ongoing activity.

So here će razvrstati suggests that the center will sort the hazardous waste as a completed action.

Yes — otpad is normally used as a singular mass/collective noun, much like English waste.

So:

• opasan otpad = hazardous waste

You do not usually need a plural form unless you are talking about different categories or types of waste in a more technical sense.

So the singular here is exactly what you would expect.

It is in the accusative, because it is the direct object of razvrstati.

However, it looks the same as the nominative because:

• otpad is masculine singular
• and it is inanimate

For masculine inanimate nouns in Serbian, nominative and accusative singular are usually identical.

So:

• nominative: opasan otpad
• accusative: opasan otpad

Same form, different function.

The adjective must agree with otpad, so it needs a masculine singular form.

Here opasan is the standard form in this expression, and opasan otpad is the usual technical/legal term for hazardous waste.

You may also encounter opasni in other contexts with masculine nouns, because Serbian has an older short/long adjective distinction. But in this fixed collocation, opasan otpad is the normal form to learn.

So the safest choice is simply:

• opasan otpad

Yes. Serbian word order is flexible, though not random.

The sentence given is fairly neutral:

• Ovlašćeni centar za sakupljanje će razvrstati opasan otpad.

But you could also move things around for emphasis, for example:

• Opasan otpad će razvrstati ovlašćeni centar za sakupljanje.

That puts more focus on opasan otpad.

Even when the word order changes, the clitic će still tends to stay in second position.

You know it from both meaning and grammar.

The subject phrase is:

• Ovlašćeni centar za sakupljanje

It is in the nominative and matches the verb as the doer of the action.

The object is:

• opasan otpad

Even though otpad looks like nominative in form, its role in the sentence is object, so it is accusative.

So the structure is:

• [Subject] Ovlašćeni centar za sakupljanje
• [Future marker] će
• [Verb] razvrstati
• [Object] opasan otpad