It had been suggested to me months ago that denim can make a pretty good filter for waste oils. Since I am trying to reduce my filter costs both in the obtainment system and under the hood I thought I would cut up some old jeans and try out the theory. I am really impressed with the quality of the oil I am getting with two layers of denim as a filter. It takes hours to get a few gallons of oil filtered, but I've come up with a extremely minimal setup that can be run in parallel. Pretty much every greaser will have these tools on hand:
- 4 cubies
- old denim, secure around cube cap threads
- 1 funnel
- 1 clean cube to catch the filtered grease
Even with my oil at 100F from the sun I'm still filtering less than 2.5 gallons per day. I just poked a hole in the top of the dirty cube to act as a air intake. I've tried filtering oil that had water content and the denim swells right up preventing contaminated oil from passing. I believe each layer of denim acts as a 20-30 micron filter.
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2 comments:
To get better throughput, increase the pressure differential across the denim. You can do this by using a taller container or by stacking the containers on top of each other with each container feeding into the previous containers hole. Although with stacking and using the holes you may run into issues with the pressure loss across the tubing, large short pieces of tubing would be best, also it would be best to keep it completely filled up to the top reservoir.
I drive my car on it. After filtering through denim I settle for 30 days, heat the oil to 130 and eventually filter through a 2 micron filter into a second tank on my car. I am using a frybrid grease car conversion kit.
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