Simple Centrifuge
Clean waste vegetable oil (WVO), bio diesel, lube oils, and even hydraulic oil in your garage
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Photo Gallery - This gallery represents the work over several years. Some designs have been replaced and/or updated as time progressed. Most images contain a date stamp visable on the large version. Please note the date when viewing. We are always experimenting with new concepts and designs. If you have any questions about any photo please contact us.
Total photos in gallery 1296 - Latest photo update 2021/12/10 18:48:01
Asterisk(*) indicates new photos in the past 30 days
Adapter 56C to 56J ( 15 )
Algae Recovery ( 42 )
Bacterial fermentation ( 1 )
Balancer Mandrels ( 8 )
Bearing replacement ( 25 )
Botry Culture ( 2 )
Building a gantry ( 16 )
Chestnut Extract ( 9 )
CNC Coolant ( 6 )
Coconut Oil ( 8 )
Construction ( 43 )
Contaminated diesel ( 2 )
Craig's Machine ( 31 )
Cross Drill End Bell ( 10 )
Crude oil ( 5 )
Custom motor shaft ( 23 )
Experimental Motor ( 19 )
Explosion proof motor ( 3 )
Feed Cone ( 29 )
Feed Cone with Fins ( 8 )
Feed Tube ( 3 )
Filter Paper ( 7 )
Ford on WMO ( 2 )
Foundry ( 5 )
Foundry 2 ( 18 )
Gear pump ( 2 )
Grinding fluid ( 19 )
Grinding fluid 2 ( 14 )
Heaters ( 9 )
History ( 11 )
Homemade Diesel ( 7 )
Homemade diesel 2 ( 41 )
Homemade Diesel 3 ( 15 )
Homemade Diesel 4 ( 12 )
How it works ( 3 )
Hydraulic Oil ( 3 )
Keyless Bushing ( 11 )
Lab Centrifuge ( 16 )
Lab Centrifuge 2 ( 18 )
Lapidary Cutting Oil ( 2 )
Lock motor shaft ( 6 )
Magnesol removal ( 6 )
Microwave heater ( 7 )
Misc. Mods ( 4 )
Mitsubishi 4x4 on WMO ( 10 )
New Feed Cone ( 16 )
New Feed Tube ( 7 )
New Rotor 2013 ( 24 )
New rotor design ( 16 )
Oil and Contaminants ( 47 )
Oil Skimmer ( 8 )
Our Shop ( 37 )
Peristaltic Pump ( 32 )
Powder Coating ( 10 )
Renderings ( 8 )
Retrofit rotor for WVOD ( 17 )
Rework Mount ( 10 )
Rotor fins ( 34 )
Rotor Fins One Piece ( 6 )
Seal ( 6 )
Sea Weed ( 4 )
Sediment removal ( 16 )
See thru lid - Building ( 16 )
See thru lid - Testing ( 28 )
Sight Glass ( 6 )
Skim Tube ( 56 )
Skim Tube for VCO ( 8 )
Small Settling Tank ( 14 )
Tanks ( 9 )
Tanks - Complete System ( 13 )
Tap drain ( 10 )
Testing Seal Screws ( 6 )
Tests by fuelfarmer ( 22 )
Turn key machine ( 38 )
Two part rotor ( 30 )
Ultrasonic filter cleaning ( 8 )
Updates ( 26 )
Users Machines ( 34 )
Vacuum pickup ( 3 )
VW on WMO ( 7 )
Water-Oil Seperator ( 7 )
Water trap ( 5 )
Wine Clarification ( 4 )
WVO Heat Tests ( 7 )
WVO Pump ( 6 )
WVO Tests ( 14 )
 Filter Paper
A customer wanted to know if the centrifuge could be modified to filter using filter paper. Normally this would require perforating the diameter of the rotor. This would commonly be called a perforated basket. After some thought it was decided to experiment with some plastic washers to allow the water to escape the top edge. I lined the rotor with paper towels and turned it on. Here are the impressive results.
Rotor lined with paper towels. Using clear lid to be able to see what's happening. Once the rotor is spinning at speed the paper towel flattens out a bit. During operation the a slurry of corn starch and water was added to the centrifuge. Water escapes on the gap between the rotor and the lid.
Rotor lined with paper towels. Using clear lid to be able to see what's happening. Once the rotor is spinning at speed the paper towel flattens out a bit. During operation the a slurry of corn starch and water was added to the centrifuge. Water escapes on the gap between the rotor and the lid.
The water escapes fairly quickly leaving behind the corn starch. It was tough to get a photo without getting wet. Once the rotor stops you can see how the paper towel has been forced into the space between the lid and the rotor base. Once the lid is removed you can see how the filter paper (common paper towels) has captured the corn starch. The heavier clumps tended to collect near the bottom because despite the centrifugal forces you can't escape earths gravity. There was some concern that the coating would be heavier near the bottom but it appears fairly consistent aside from the clumps. A screen baffle would likely even it even more. Not the six nylon plastic washers to create the small gap between the rotor and the lid.
The water escapes fairly quickly leaving behind the corn starch. It was tough to get a photo without getting wet. Once the rotor stops you can see how the paper towel has been forced into the space between the lid and the rotor base. Once the lid is removed you can see how the filter paper (common paper towels) has captured the corn starch. The heavier clumps tended to collect near the bottom because despite the centrifugal forces you can't escape earths gravity. There was some concern that the coating would be heavier near the bottom but it appears fairly consistent aside from the clumps. A screen baffle would likely even it even more. Not the six nylon plastic washers to create the small gap between the rotor and the lid.
The filter material and corn starch removed fairly cleanly from the rotor with minimal damage to the cake.    
The filter material and corn starch removed fairly cleanly from the rotor with minimal damage to the cake.    
Numeric Control, LLC
PO Box 916
Morton, WA 98356