Listed below are recent posts across all of CalRecyle's blogs.

  • Yolo County Prepares for SB 1383 Implementation with Launch of New Anaerobic Composter

    organic food scraps and hands holding compost

    Yolo County began operating a new anaerobic composter on Oct.1 that can recycle 52,000 tons of organic waste each year into compost, biofuel, and electricity. 

     The facility will keep that organic material out of the county landfill. In landfills, organic waste decomposes and generates methane, which is a major contributor to climate change.

     Instead, food waste, grass clippings, and other organic material collected from local businesses and residents is delivered to the anaerobic composting facility, a 10-acre spot with seven “cells,” at the Yolo County Central Landfill site. 

     When the organic material is delivered to this site, it is ground up and deposited into cells. Each cell is sealed by spraying the surface with a mixture of cement, fibers, and polymer. Once the bacteria-rich liquid is pumped into the cell, the anaerobic digestion process takes place, and in less than six months, biogas is finally produced.

     “Moisture is removed from the biogas produced, and it’s injected into an internal combustion engine that burns the gas, which creates electricity,” said Ramin Yazdani, Director of Yolo County Integrated Waste Management.  “The electricity goes on the grid and is sold to SMUD (Sacramento Municipal Utility District).”

     After methane production has dropped off, the is operated aerobically, utilizing the aeration piping system. Air is injected into the cells to aerate the digestate material for a two-week aerobic digestion phase. This creates compost. 

     The material is then excavated, cured, and screened of contamination. Once the process is complete, the county will sell the compost to residents and businesses. 

     Compost has many beneficial uses, including as a soil amendment and in erosion control. Learn more about compost on our website.

     In 2007, Yolo County received a $200,000 CalRecycle grant to run a pilot project that broke down 2,000 tons of organic waste in a smaller cell.

     “That created the basis of our current design,” Ramin said, “and it showed us operational challenges that we had to learn from in order to design and operate a better system.”

    Posted on In the Loop by Syd Fong on Nov 18, 2019

  • Smashing Pumpkins

    How to recycle Jack-o-Lanterns

    Now that Halloween is over and the trick-or-treating is all done, you probably have a jack-o’-lantern still sitting on your front porch. Seriously, what are you going to do with that pumpkin?

    Well, a lot of people simply put it in the trash can, and that’s not the best place to put it.

    If tossed into the trash, a rotting pumpkin will decompose like any other food waste and emit methane, a harmful greenhouse gas.

    American’s likely spent $377.23 million on pumpkins for carving into jack-o-lanterns in 2019. Across the nation, more than 650,000 tons (1.3 billion pounds) of pumpkin flesh could be headed to landfills because many consumers will carve the pumpkin but not consume it.

    So, what’s a possible solution? Well, how about composting old pumpkins?

    If you have a green waste curbside collection bin, chances are you can put your pumpkin in there where it will be taken to a compost or anaerobic digestion facility and turned into biofuel. If you would like to compost the pumpkin in your own compost pile, you can find a compost recipe and tips on our website. But here’s the basic gist of how to get it done.

    • Remove candles, artificial lighting, or any other decorations that are in or attached to the pumpkin. Pumpkins that have been decorated with paint or glitter should not be composted.
      • Remove the seeds so you don’t risk starting a pumpkin patch in your compost pile. (It’s OK if you do—just turn those pumpkins back into more compost.)
      • A clean pumpkin can be added to an existing compost pile and mixed in with other ingredients.
      • Another bonus to composting pumpkins—you can smash the orange head into smithereens and compost all of the tiny pieces. (Such a good way to let out your aggression after someone egged your house. Darn kids!)

      Posted on In the Loop by Syd Fong on Nov 4, 2019

    • CalRecycle Launches New Recycling and Disposal Reporting System

      CalRecycle Launches New Recycling and Disposal Reporting System


      As a state with more than 40 million residents, California generates a lot of waste—to the tune of 77.2 million tons in 2017 alone. In 2019, CalRecycle launched a new Recycling and Disposal Reporting System to track how organics, recyclable material, and solid waste are managed throughout the state. Regulated businesses have registered and, in some cases, have already started reporting data to CalRecycle. The department expects to release the first quarterly report in January 2020.

      Under the previous reporting system, information was reported to counties and regional agencies that aggregated the data before sending it to CalRecycle. To better understand the composition of our waste streams, CalRecycle supplemented that data with detailed waste characterization studies.

      The new system builds on these efforts by requiring recycling and composting businesses, facilities, and operations to report directly to CalRecycle, thereby streamlining the submittal process and helping CalRecycle not only understand what is being recycled, but also where in the state materials are managed. With better data, CalRecycle can more accurately assess the waste and recycling industry landscape in order to identify specific challenges and promulgate potential solutions.  

      Regulated businesses are starting to report their data in incremental steps as materials flow through collection centers and transfer stations to recyclers, composters, and landfills. Quarter Three (July-September) 2019 data will be fully reported by the end of December 2019, and CalRecycle will analyze and report the results in January 2020.

      Posted on In the Loop by Christina Files on Oct 24, 2019