Sebelum diminum, jus itu perlu disaring; saya menyaringnya dengan saringan kecil di dapur.

Because diminum is the passive form of minum.

• sebelum diminum = before being drunk / before it is drunk
• The focus is on the juice, not on who drinks it

This is very natural in Indonesian when the agent is unimportant or obvious.

Compare:

• Sebelum diminum, jus itu perlu disaring.
  = Before being drunk, the juice needs to be strained.

• Sebelum minum, ...
  = Before drinking, ... / Before you drink, ...

So sebelum minum would shift the focus more toward the person drinking, while sebelum diminum keeps the focus on the juice.

Here, di- marks the passive voice.

• minum = to drink
• diminum = to be drunk
• saring = to filter / strain
• disaring = to be filtered / strained

So:

• jus itu perlu disaring = the juice needs to be filtered
• sebelum diminum = before it is drunk

A very important point: this di- is different from the separate word di meaning in / at / on.

• disaring = one word, passive prefix
• di dapur = two words, preposition + noun, meaning in the kitchen

They look similar, but they are completely different.

1. di- as a prefix
This attaches directly to a verb and makes it passive.

• disaring = filtered / strained
• diminum = drunk

2. di as a preposition
This is written separately and means in, at, on.

• di dapur = in the kitchen
• di meja = on the table
• di rumah = at home

A good spelling clue:

• If it is a passive verb, it is usually one word
• If it is a location phrase, it is written separately

They all come from the same root: saring, which has to do with filtering or straining.

Here is the family:

• saring = root
• menyaring = to filter / to strain
  active verb, used when the subject does the action
• disaring = to be filtered / to be strained
  passive verb
• saringan = filter / strainer / sieve
  a noun, usually the tool

In the sentence:

• jus itu perlu disaring
  the juice needs to be strained
• saya menyaringnya
  I strain it
• dengan saringan kecil
  with a small strainer

This is a very common pattern in Indonesian: one root can produce related verbs and nouns through affixes.

perlu means need to / necessary to.

So perlu disaring literally means needs to be filtered or it is necessary for it to be filtered.

This pattern is very common in Indonesian:

• perlu dibersihkan = needs to be cleaned
• perlu diperbaiki = needs to be repaired
• perlu dicuci = needs to be washed

Indonesian often uses perlu + passive verb when talking about what needs to happen to something.

That is why jus itu perlu disaring sounds natural: the juice is the thing receiving the action.

itu literally means that, but in many contexts it also works a lot like the in English.

So jus itu can mean:

• that juice
• the juice
• the juice we are talking about

Indonesian does not have a direct word for English the, so words like itu often help mark something as specific or already known in context.

Also notice the position:

• jus itu = the/that juice

In Indonesian, demonstratives like ini and itu usually come after the noun:

• rumah ini = this house
• rumah itu = that house

The suffix -nya here means it.

So:

• saya menyaringnya = I strain it

In this sentence, -nya refers back to jus itu.

This is very common in Indonesian. Instead of repeating the noun, you can attach -nya to the verb:

• Saya minum jus itu. = I drink the juice.

• Saya meminumnya. = I drink it.

• Saya menyaring jus itu. = I strain the juice.
• Saya menyaringnya. = I strain it.

So -nya is often a very natural way to say him/her/it/them, depending on context.

Because the prefix meN- changes shape depending on the first sound of the root.

With the root saring, the s disappears after the prefix, giving:

• meN- + saring → menyaring

This is a normal sound change in Indonesian morphology.

Some common patterns:

• meN- + sapu → menyapu
• meN- + tulis → menulis
• meN- + pukul → memukul
• meN- + kirim → mengirim

So menyaring is the correct active form, not mensaring.

dengan means with / by means of.

Here it introduces the instrument used for the action:

• dengan saringan kecil = with a small strainer

So the structure is:

• saya menyaringnya dengan saringan kecil
  = I strain it with a small strainer

This is a normal way to express tools or means in Indonesian.

You could also hear pakai in everyday speech:

• Saya menyaringnya pakai saringan kecil.

That is also natural, but dengan is a bit more neutral and works well in both spoken and written Indonesian.

In this sentence, saringan clearly means the tool: a strainer or filter.

With the suffix -an, Indonesian often forms nouns connected to the action, and sometimes the exact meaning depends on the word. For saringan, the most common meaning is the object used to strain something.

So here:

• saringan kecil = a small strainer / small filter

In context, that is the most natural interpretation.

Because it is a location phrase, and Indonesian often puts location information after the main action.

• saya menyaringnya dengan saringan kecil di dapur
  = I strain it with a small strainer in the kitchen

This order is very natural:

1. subject
2. verb
3. object
4. instrument
5. location

But Indonesian word order is fairly flexible, so other orders are also possible if you want to emphasize something:

• Di dapur, saya menyaringnya dengan saringan kecil.
• Saya menyaringnya di dapur dengan saringan kecil.

All of these are understandable. The original version is just a smooth, neutral order.

Yes, but it means something slightly different.

• Sebelum diminum, jus itu perlu disaring.
  = Before being drunk, the juice needs to be strained.
  Focus: the juice

• Sebelum saya minum, jus itu perlu disaring.
  = Before I drink it, the juice needs to be strained.
  Focus: me, the drinker

So both can work, but they are not identical.

The original sentence is more general and more object-focused. It sounds like a natural instruction about what should happen to the juice before consumption.

Not especially. It is mainly punctuation linking two closely related clauses.

The sentence could also be written as:

• Sebelum diminum, jus itu perlu disaring. Saya menyaringnya dengan saringan kecil di dapur.

That is probably the most common way in everyday writing.

The semicolon simply shows that the two parts are strongly connected:

• first clause: what needs to happen
• second clause: how the speaker does it

So it is fine, but not grammatically essential.