Clarifier Purification Unit

The Clarifier Purification Unit (CPU) is an LuV tier multiblock used for the first step of the Water Line. Its automation challenge is very simple: it requires an Activated Carbon Filter to run, and has a 20% chance of consuming that filter on each cycle, so it is necessary to passively produce the filters to run the CPU.

The CPU has no tiered components or energy hatches because it receives power directly from the Water Purification Plant once linked with a data stick, like the rest of the Water Line multiblocks. The water is spawned for free once formed and therefore does NOT need to be placed manually. Use the Multiblock Structure Hologram Projector to visualize/build the structure.

Structure

• Controller: Front center, 2nd layer
• 123-128 Reinforced Sterile Water Plant Casing
• 21 Filter Machine Casing
• 12 Iridium Frame Box
• 12 Damascus Steel Frame Box
• 3 PTFE Pipe Casing
• 1+ Input Bus: Any center side casing
• 1+ Input Hatch: Any center side casing
• 0+ Output Bus: Any center side casing
• 1+ Output Hatch: Any center side casing

See More: Waterline#Shared Mechanics

The CPU requires Activated Carbon Filters in an Input Bus to run, and has a 20% chance of consuming one when it starts a recipe. It has a fixed success chance of 70%. Because the CPU has this fixed success chance, it's almost always a good idea to feed Grade 1 water back into it to increase the success chance to 85%, which can be done using Fluid Storage Bus priorities to ensure Grade 1 water is sent to the CPU before being sent to either the next step or the main network.

See More: Automation#Passive Processing with AE2

The process for making Activated Carbon Filters is a simple passive line that requires Carbon and Zinc and loops Phosphoric Acid, which can be automated using either a fully passive or a level maintained approach. Because the demand for Activated Carbon Filters never increases, it's very possible to use singleblocks to produce them, which should be done for at least the Assembler step to avoid the expense and size of the Precise Assembler. The following table shows the minimum voltage needed for each step to consistently produce the filters, both for the worst case of one filter every 2 minutes and the average case of one filter every 10 minutes.