How to make the perfect coffee filter
Coffee filters can be used to make a great tasting, but less expensive alternative to a plastic cup, but a new paper by researchers at MIT has found that the filters’ design and efficiency are just as important as the quality.
The paper, published today in the journal Environmental Science & Technology, examines the performance of three types of coffee filters: an alkaline filter, an oxygen-filled filter, and a carbon dioxide-filled, hydrogen-containing filter.
Each filter has been tested with a wide range of microorganisms, and each one produces a range of different compounds, according to the paper’s authors, who used a variety of methods to identify the most efficient and environmentally friendly filters.
“These filters are so versatile that the fact that they’re made of materials we can reuse and recycle means that they can be made with lower energy consumption and less environmental impact than plastic or plastic-coated filters,” said Dr. Robert M. O’Brien, an associate professor of environmental engineering and of materials science and engineering at MIT and lead author of the paper.
O-shaped coffee filters are often used to filter out the watery coffee aroma, and these filters, with their flexible shape, are very efficient at removing the coffee.
But they have drawbacks: They have to be made from plastic and can’t be reused.
The MIT researchers found that they could design a filter that uses a carbon-containing resin, and they did so by using a combination of polymers and a special kind of ceramic called a ceramics-reactive ceramic (CRCC).
They found that carbon-reactivating ceramicals made up of a single polymer, a hydrophobic polymer, and ceramic fragments could be easily fabricated and easily reused, and that these ceramic fragments were able to produce a wide variety of chemicals.
“We’re really excited about this research because the potential of these ceramically-reactivated ceramic components is really exciting,” said M.K. Rao, a senior author of this study.
“The material we’re interested in is the ceramates that we’ve found to be the best, because they’re very reactive and they have this property that we haven’t really been able to find yet.
It’s just an exciting area of research that we think will change the way we design filters.”
The researchers also tested the efficiency of their ceramitic filters by using two types of microbe.
The first tested a strain of Bacillus subtilis (a bacterium commonly found in the guts of animals and humans) and the second tested a bacterium called Pseudomonas aeruginosa.
These microbe strains are highly efficient at filtering out coffee but aren’t very good at removing other chemicals.
The researchers found a much higher efficiency of the Ceramics Reactive Ceramics (CRAC) filter when compared with the carbon-based Ceramicals.
“It is clear that the CRAC filter is the most environmentally-friendly of all the filters,” Rao said.
The CRAC ceramic filter, however, was not as efficient as the ceramic ones.
The carbon- and carbon-free ceramic filters were all equally effective, although the carbon ceramic filter was much more effective than the carbon CRAC.
The new research indicates that the ceramic filter’s efficiency is directly related to the strength of the ceramide and the ceramic fragments.
“There is a relationship between the strength and the ability of the ceramic to absorb certain chemicals,” Rao told The Verge.
“When we think of ceramic filter performance, we think that it has to be high.
We are seeing the opposite of that.
It is more important to think of the strength as how well the ceramic works when it comes to removing certain chemicals.”
Rao added that the research could be used in other applications as well.
“This research is exciting because it is a step forward toward using ceramides to produce new filter materials, such as ceramids that are very robust, and it could be applied to the production of a range from ceramic-recyclable to ceraminated filters,” he said.