The idea behind the trommel is [that] you're meant to have it running in the background anyway. It shouldn't be your main plan of action; it's just a way to get the most out of trash resources.[1]
— Mak, January 12, 2022
The trommel is a utility block capable of recycling dirt, gravel, and similar sediments into more useful resources such as clay, quartz, and olivine.
Obtaining
Breaking
Trommels can be mined using a pickaxe, in which case it drops itself. When mined without a pickaxe, it drops nothing.
The trommel has four input slots in its GUI, each capable of holding one stack of blocks. To begin the sifting process, the trommel must also have fuel. The trommel accepts the same fuels as the furnace. The trommel will only process one slot at a time; fuel consumption is the same regardless of how many slots are used (i.e a piece of coal will process 30-32 blocks in total).
The trommel does not have an output slot; any items processed are spat out unless the trommel is connected to a chest. There is a 1 in 4000 chance when using the trommel for it to throw a small slime out of the front.
A chest connected to a trommel.
The trommel is capable of processing the following blocks: