Fruit and vegetable compost

Food Waste Grinders for Organics

Government agencies around the world are enacting new restrictions on the disposal of food waste. Food waste and other organic waste disposed of in landfills produces methane, a greenhouse gas, as it decomposes. The amount of food waste has been increasing dramatically over the last several decades and some estimates indicate that as much as 40% of food in the US is thrown away. Composting or using food and other organic waste as feed stock for an anaerobic digester are two of the common alternatives to landfill. Both methods require food waste grinders to pre-condition the organic waste materials to make the processes more efficient.

Food Waste Grinders

Monster Industrial SHRED products are the perfect food waste grinder machine. Saving on transport costs, reducing the food waste volume, increasing surface area of the food waste to enhance digestion or protecting pumping equipment from trash and debris are all possible with a commercial food waste grinder. Unfortunately source sorting of pre and post-consumer foods waste is not perfect. JWC’s food waste grinders are tough enough to handle the unexpected materials like wood, flatware, and other trash.

Municipal Food Waste Recycling

Wastewater treatment plants in many cities have undertaken projects to collect food waste, FOG and other organics for beneficial reuse. Most commonly plants are receiving the organics for utilization within digestor for biogas production. Resulting biogas and reclaimed heat is used to run wastewater treatment operation and potentially sell back to gas and power grids. For organic materials arriving by tanker truck they are often run through a commercial food waste grinder like a 30K or 40K Muffin Monster. These will shred unexpected materials in the food waste protecting process pumps.

OEM Food Waste Shredders

JWC can also partner with OEM manufacturers to provide a customized commercial food waste grinder for food waste disposal equipment. The 1-SHRED and 1-HYDRO products are an excellent alternative to macerators which cannot effectively handle the tougher solids. Also a JWC’s food waste grinder does not require a constant flow of water to flush the cutting area like a macerator of food disposer system.


  • Handle the unexpected debris in food waste like wood, flatware and other debris
  • Able to meet MARPOL marine food waste disposal regulations
  • Minimize waste disposal costs by grinding up organic waste and sending it to be composted
  • Enhance biogas production through increasing food surface area in anaerobic digestion
  • Lower water usage compared to macerators or food waste disposers

Typical Applications

  • Cafeterias
  • Municipal Wastewater treatment plants
  • Ships complying with MARPOL Annex V Food Waste Disposal Regulation
  • Biogas and Waste-to-energy plants
  • Composting operations
  • Food Waste Management

Composting Fruit And Vegetable Waste – Should You Cut Up Compost Scraps

Should you cut up compost scraps? Shredding scraps for composting is a common practice, but you may have wondered if this practice is necessary or even effective. To find the answer, let’s look at the biology of compost.

Composting Fruit and Vegetable Waste

You add plant material, such as food scraps, garden waste, and lawn clippings, to the compost pile. Small invertebrate animals like earthworms, millipedes, sow bugs, and beetle grubs feed on the plant material, breaking it down into smaller pieces and increasing its surface area.

The greater surface area allows microbes, including bacteria and fungi, to access more of the organic material in the scraps and eventually break them down into finished compost. Meanwhile, predatory invertebrates like centipedes and spiders feed on the first group of invertebrates and contribute to the rich biology of the compost.

But will composting fruit and vegetable waste into smaller portions beforehand make any

difference to this naturally occurring process?

Does Cutting Scraps Help Compost?

The answer to this question is yes, but it’s not required. Cutting up scraps will help your compost break down faster by increasing the surface area of the compostable material. It will also help break up resistant materials like peels and shells. This allows microbes to access the decompostable material in the scraps and get to work faster.

However, even if you don’t shred scraps, the worms, millipedes, snails, and other plant material-feeding invertebrates in your compost pile will shred them for you by consuming them and breaking them down into smaller pieces. The pile will compost with time anyway.

On the other hand, it is important to break up large, hard-to-compost materials like sticks and wood mulch into smaller pieces to help them break down faster. Wood can take years to break down on its own, making it unlikely that large pieces will compost and be ready to use at the same time as the rest of the compost pile.

When composting fruit and vegetable waste, shredding or grinding is less important, and it’s certainly not essential. But it can help your compost pile break down faster, providing you with finished compost that will be ready to use on your garden sooner. It can also lead to a finer-textured finished product that may be easier to incorporate into your garden.

If you do cut up scraps before adding them to the compost pile, be sure to turn the pile often. A compost pile consisting of smaller pieces will be more compact, so there will be less air flow within the pile, and it will benefit from the extra aeration when you turn it over.

Composting At Home

  • What To Compost
    • Fruits and vegetables
    • Eggshells
    • Coffee grounds and filters
    • Tea bags
    • Nut shells
    • Shredded newspaper
    • Cardboard
    • Paper
    • Yard trimmings
    • Grass clippings
    • Houseplants
    • Hay and straw
    • Leaves
    • Sawdust
    • Wood chips
    • Cotton and Wool Rags
    • Dryer and vacuum cleaner lint
    • Hair and fur
    • Fireplace ashes
  • What Not To Compost and Why
    • Black walnut tree leaves or twigs
      – Releases substances that might be harmful to plants
    • Coal or charcoal ash
      – Might contain substances harmful to plants
    • Dairy products (e.g., butter, milk, sour cream, yogurt) and eggs*
      – Create odor problems and attract pests such as rodents and flies
    • Diseased or insect-ridden plants
      – Diseases or insects might survive and be transferred back to other plants
    • Fats, grease, lard, or oils*
      – Create odor problems and attract pests such as rodents and flies
    • Meat or fish bones and scraps*
      – Create odor problems and attract pests such as rodents and flies
    • Pet wastes (e.g., dog or cat feces, soiled cat litter)*
      – Might contain parasites, bacteria, germs, pathogens, and viruses harmful to humans
    • Yard trimmings treated with chemical pesticides
      – Might kill beneficial composting organisms

      * Check with your local composting or recycling coordinator to see if these organics are accepted by your community curbside or drop-off composting program.

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Benefits of Composting

  • Enriches soil, helping retain moisture and suppress plant diseases and pests.
  • Reduces the need for chemical fertilizers.
  • Encourages the production of beneficial bacteria and fungi that break down organic matter to create humus, a rich nutrient-filled material.
  • Reduces methane emissions from landfills and lowers your carbon footprint.

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How to Compost at Home

There are many different ways to make a compost pile; we have provided the following for general reference. Helpful tools include pitchforks, square-point shovels or machetes, and water hoses with a spray head. Regular mixing or turning of the compost and some water will help maintain the compost.

Backyard Composting

  • Select a dry, shady spot near a water source for your compost pile or bin.
  • Add brown and green materials as they are collected, making sure larger pieces are chopped or shredded.
  • Moisten dry materials as they are added.
  • Once your compost pile is established, mix grass clippings and green waste into the pile and bury fruit and vegetable waste under 10 inches of compost material.
  • Optional: Cover top of compost with a tarp to keep it moist. When the material at the bottom is dark and rich in color, your compost is ready to use. This usually takes anywhere between two months to two years.

Indoor Composting

If you do not have space for an outdoor compost pile, you can compost materials indoors using a special type of bin, which you can buy at a local hardware store, gardening supplies store, or make yourself. Remember to tend your pile and keep track of what you throw in. A properly managed compost bin will not attract pests or rodents and will not smell bad. Your compost should be ready in two to five weeks.

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Fruit and vegetable waste can be used for the production of organic compost, which when mineralized can increase the availability of nitrogen. The objectives of this study were: (a) to produce compost from different ratios of fruit and vegetable waste, rice husk and poultry manure that meets the legislation on organic fertilizers and (b) to assess the mineralization of N in substrates prepared with different ratios of compost. In experiment 1, the following treatments were prepared using (fruit and vegetable residue: rice husk: poultry waste) (v:v): Treatment 1 (2:1:0), T2 (1:1:1), T3 (1.5:1:0) and T4 (1.2:1:0). All the treatments were subjected to composting for 95 days, were subjected to analysis of nutrients, organic carbon, C/N, CEC/C, pH and moisture content. The composts were compared in regards to the parameters required by legislation. In experiment 2, the treatments consisted of eight blends of agricultural peat, carbonized rice husk and organic compost pre-selected from experiment 1. The NO3 –N and NH+ 4-N contents were analyzed in the substrate at time zero and at 7, 14, 28, 56, 112 days after incubation. Compost (C2) met the parameters required by legislation and the use of 40% in the substrate composition promoted the mineralization of N.

Keywords : organic fertilizer; nutrientes; substrates.

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