Adding compost to one’s garden can significantly improve the health of your plants. Coffee grounds can help increase nutrient levels while decreasing the greenhouse gas emissions of one’s compost.
Repel insects and pests
Several compounds in SCG are toxic to many insects. It’s surprising to learn that coffee grounds can actually be used to repel mosquitos, fruit flies, beetles, and other pests.
Remove fleas from your pets
Like some of those previously mentioned insects, fleas do not like coffee. Keep your pet flea-free by bathing them in used coffee grounds.
Neutralize odors
Odors emanating from the refrigerator can be unpleasant but no need to worry. Coffee grounds can help absorb and eliminate odors from your refrigerator, gym bag, or even from smelly shoes. Using them as a hand scrub can also help remove lingering smells from onion or garlic.
Use it as a natural cleaning scrub
SCG can be used as an abrasive cleaner and can help sanitize and remove buildup from sinks, cookware, grills, and other surfaces around the house.
Coffee Ground Uses: Removing lead ions from water
In an attempt to reuse food waste for useful purposes, a study investigated the possibility of using coffee grounds to remove lead ions from drinking water. The lead ion adsorption characteristics of coffee beans and grounds were studied by measuring their fat and protein content, adsorption isotherms for lead ions, and adsorption rates for lead ions. The number of lead ions adsorbed by coffee grounds did not depend on the kind of coffee beans or the temperature at which adsorption tests were performed.
The rate of lead ion adsorption by coffee grounds was directly proportional to the amount of coffee grounds added to the solution. When coffee grounds were degreased or boiled, the number of lead ions decreased. The experiments demonstrated that proteins contained in coffee beans depend upon the adsorption of lead ion. In essence, this study demonstrated that the abundant food waste that is coffee grounds can indeed be used for removing lead ions from drinking water.
Coffee Ground Uses: Converting to biodiesel
Yet another study conducted with SCG attempted to extract oil from the grounds and then convert that same oil to biodiesel. Depending on whether it uses Arabica or Robusta coffee, this process yields 10-15% oil. The biodiesel derived from the coffee grounds (100% conversion of oil to biodiesel) was found to be stable for more than 1 month under ambient conditions.
It is projected that 340 million gallons of biodiesel can be produced from the waste coffee grounds around the world. In addition, the coffee grounds after oil extraction also proved to be ideal materials for garden fertilizer, feedstock for ethanol, and as fuel pellets.
Key takeaways
The world continues to learn new ways of recycling waste products. An unexpected bonus that most are likely unaware of might be in coffee ground uses. More uses are being found for something seemingly so ubiquitous as coffee grounds. It is heartening to learn how these can be reused for other purposes.
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