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home composters natureMill automatic composter

click images to enlarge

Compostio C40
Kitchen Composter

Please allow 2-4 weeks for delivery


The NatureMill Compostio C40 Kitchen Composter

A Home Solution, Great for the Environment!

NatureMill brings composting to the home user. It is essentially a miniature in-vessel system. Waste is collected right where it is generated-in the kitchen. A computer controls the temperature, air flow, moisture, and mixing to accelerate the process and eliminate the backbreaking work. Everything is fully self contained in an modern, attractive container.

Best of all, NatureMill provides home gardeners with a source of rich, organic fertilizer. And there is something uniquely satisfying about witnessing the entire food chain: from the garden, to the dining table, and back to the garden again.


"This thing is has reduced our household waste 50% and has led us to make healthier food choices.... THANK YOU FROM THE BOTTOM OF MY GARDEN!"

Jacob S., Wyoming

"NatureMill has changed my life. As I get older I can't turn my compost pile (and I never really got it to work anyway). Now I have great compost on a regular basis, without the heavy lifting."

Edmond R., Nevada

"The great thing is that I didn't have to put anything together. Simply plug it in and start using it... Cuts down on house hold waste and is great for the environment."

Jeffrey B., New Jersey


Did You Know ::

  • Landfills contain more food and paper waste than diapers, styrofoam, and tires - combined.
  • Our society recycles more and more each year. But due to rising personal consumption and overall population growth, total annual landfill waste is still increasing.



This is our top of the line composter and is able to handle 4 gallons of food scrapes per week. This is perfect for customers who have a lot of food waste or a family of 3-5 people.

Recommended Materials: Add a mix of "green" and "brown" items.

"Green" items include: fruit, vegetable scraps, meat, chicken, fish, fish bones, shrimp tails, cheese, eggs, egg shells, tea leaves, grass & plant clippings

"Brown" items include: sawdust, wood shavings (untreated, unpainted wood), bread, rice, pasta, grains, nuts, nut shells, straw, dry flowers, small yard leaves, coffee grounds

Limit very acidic items to 2 lbs (900g) per load: oranges, grapes, berries, plums, pickles, tomatoes. 3-4 piece limit for lemon, lime, grapefruit, pineapple.

Not Recommended Materials:

pourable liquid, chemicals, soap, cosmetics, medicine, plastic, metal, glass, rubber, alcohol, cigarettes, office paper, newspaper, magazines, hard or fibrous itmes such as chicken and steak bones, lobster and clam shells, wine corks, avocado pits, corn cobs & husks, coconut shells, lemongrass, diseased foods, human waste, disposable diapers.


Sets the Industry Standard for Composting

  • Fully automatic and odor free
  • Indoor or outdoor use, even in cold weather, rain, or snow
  • Add food waste any time
  • All NatureMill composters can compost pet waste, kitty litter, and cage beddings.
  • Compost is ready every 2 weeks
  • WARRANTY: 1 year
nature mill compostion diagram

How it Works

Items remain in the upper chamber, with "hot composting" conditions: mixing, air flow, heat, and moisture (see diagram). The energy released destroys odors, pathogens, and seed germination. The compost is later transferred through a trap door to the lower cure tray chamber, where it continues to compost while you add fresh waste items to the upper chamber.

  1. Add waste items - any time, any day!
    Add organic waste: vegetables, coffee grounds - even dairy, meat or fish!
  2. NatureMill does the rest!
    The upper chamber mixes, heats, and aerates. Compost later transfers to the lower chamber, so you can add fresh items.
  3. Remove rich compost fertilizer every 2 weeks
    Empty every 2 weeks, when the red light comes on.


Compare our Composters

More info about the NatureMill Compostio C40 Kitchen Composter

Compostio C40 Features:

  • 4 gallon (15 L) weekly capacity:
  • Double reinforced, metal motor gears to help grind food more efficiently and internal release mechanism for jams.
  • Control panel with 3 power settings: High, Medium, and Low
  • Material-energy efficient APPRO which keeps the heat in the unit, helping the compost break down faster.
  • Fresh Compost every two week
  • Color: Black
  • Warranty 1 Year
  • Made in USA

 Features All Compostio Units: 

  • Control panel with 3 power settings: High, Medium, and Low
  • Made from APPRO which is a durable, recyclable, lightweight, and energy efficient material. Helps keep heat in the unit which breaks the food scraps down faster.
  • Automatic mixing, heating, and air flow
  • Fully assembled, ready to use –includes power supply, 1 box of baking soda, and 5.5 pounds of pellets to get you started with.
  • Hot composting process which accepts meat, fish, and diary.
  • Two chamber system: add food any time to the upper chamber and then when full transfer to the lower chamber and start over again. The lower chamber keeps curing.
  • Internal Components food grade metal that will not rust
  • Internal Temperature: 110-140 degree's , depending on usage and settings. 
  • External Temperature
  • Produces fresh compost every 2 weeks , based on usage. 
  • Use indoors or outdoors –
  • Dimensions: 20 x 12 x 20 inches and 22 pounds
  • Made from recycled and recycable materials and stamped with the "5" triangle recycling symbol
  • Manufactured in the USA
  • Comes with a quick guide, food guide, and instructions to get you started composting right away. 

A Little Company History: A Chance Discovery

We aim to make a difference. We diligently recycle paper, bottles, and cans. We read newspapers online to cut down on paper. We favor environmentally friendly products and packaging. Some of us even walk or bike to work. But despite our commitment to “the 3Rs” - reduce, reuse, recycle - we still produce shameful amounts of trash.

So we ventured into backyard composting. A humble kitchen crock diverts an impressive amount of trash from the kitchen to an outdoor compost pile. And unlike other forms of recycling, composting uses no chemicals, fossil fuels, or other environmentally harmful materials.

But a few months into our compost adventure, reality set in. It smells! It's dirty! Turning the pile each month is backbreaking! It's definitely no fun in the cold and rainy months. And besides, not everyone has a backyard. We should be able to engineer a better solution.

A Chance Discovery

Then a funny thing happened. Someone (we won't name names) went away on vacation without emptying the kitchen compost crock. A nasty surprise awaited his return - the smell, the flies, and a very unpleasant clean-up job.

While grudgingly cleaning out the compost crock, he noticed it was warm. Compost cultures were hard at work. The compost process had begun! Just a little more oxygen, some mechanical mixing, and a strong air filter would accelerate the process and eliminate the odors and bugs. Dozens of prototypes and patents later, NatureMill was born.

We're up to great things. Just watch us. Someday everyone in the world will compost, and what a difference that will make.



  • For a one year period after purchase: free replacement parts, repair by field technicial, or replacement of entire unit.
  • Return an unused unit within 30 days for a full refund. Due to the biological implications of composting, returns generally not accepted after contact with food waste..


  • shipping box: 20" x 12" x 20" (68.6 x 58 x 43 cm); 24 lbs (13 kg)
  • shipping is $15

Return Policy