Solutions to Make the World a Better Place For All of Us

TNRE develops, builds, and operates state-of-the-art organics-to-renewable energy facilities, including large scale, regional, high-solids anaerobic digestion (HSAD) infrastructure. These facilities reuse and repurpose organic resources diverted from landfills to create beneficial, sustainable products, including biogas, RNG for pipeline injection, and soil-amending compost. TNRE is focused on partnering with communities in California to meet local and state requirements for diverting organic waste from landfills and cutting short-lived climate pollutant (SLCP) emissions.


Diverting organic wastes from landfills should be an immediate priority putting us on the quickest path to reducing SLCPs in the near-term while facilitating the circular economy.


TNRE believes strongly in the importance and urgency of diverting organics from landfill – avoiding methane emissions and putting organic material to work.  Regional, well-managed, controlled composting operations along with anaerobic digestion (AD) facilities can help accomplish meeting big SLCP-reducing targets and with these new, modern facilities, minimize any new potential source of methane emissions.  

Putting organic streams to beneficial use, TNRE has developed holistic AD infrastructure, processing the entirety of the organic material stream, producing renewable natural gas (RNG), natural fertilizers and soil amendments.

The proven leadership of TNRE has developed and operated more than 30 projects throughout the UK and EU, select projects in California, and offers more than 60 years of collective experience in developing AD projects, energy and waste market analysis.

Modular & Scalable

We are developing a solution that helps municipalities and waste management companies address changing collection behavior and increased percentage of food material in the organics stream.  The TNRE facilities can adapt as organic make-up changes. 

At full build-out, a TNRE facility in California


TNRE Organics Recycling Facilities can process and recycle commingled (“mixed”) organic material. What does that mean? Mixed organic material can come from your kitchen table, your local restaurant, or your backyard.  TNRE can handle those mixed organics – like food scraps, grass clippings, or yard trimmings – all at one facility. Plus, our facilities are versatile and can scale-up given a community’s changing collection system or even eating habits. 

Distinct Features & Services – 

TNRE’s process is transformative for the recycling sector – meeting the diversion goals of today and into the future

  • Complying with CalRecycle requirements
  • Guaranteed processing capacity to meet company and community needs
  • Accept a wide and changing range of organic wastes
  • Cope with varying levels of non-organics and changing waste composition
  • Supports SSO/commingled collected organics (green & food)
  • Does not produce liquid digestate
  • The process is highly automated process allowing a 24/7 operation of the key systems – digestion process, biogas upgrading and air cleaning
  • Enclosed receiving area
  • Pre-processing includes removing contaminants (plastics, non-organics) prior to feeding of the digester
  • Proven and robust Anaerobic digestion process
  • Air cleaning and odor abatement
  • Yielding a ready-for-market compost product servicing regional agricultural, farming and landscaping needs
  • High yield of renewable natural gas feeding into the natural gas pipeline


Accepted Organic Materials * – 

TNRE will process the entirety of the organic waste stream – food scraps, green waste and yard trimmings. The digester is continuously fed with fresh material. The system is an anaerobic thermophilic dry digestion process effectively eliminating pathogens.  TNRE facilities can manage loads from a variety of sources – residential, industrial, institutional and commercial sources – and will accept the following: 

  • Food scraps (postconsumer food either deemed not edible by the consumer or plate scrapings)
  • Commingled collected food & green material
  • Green material
  • Yard trimmings
  • Industrial commingled food
  • Compostable material**
  • Packaged food **
  • Fat, oil and grease (FOG) and liquid food 


* TNRE will not contain biosolids – a heavy metal source

** limitations apply, details to be discussed with TNRE.  Packaged foods can be de-packaged. TNRE facilities will be able to process most compostable foodservice ware products, for instance those that follow ASTM and ISO standards and certified by the Biodegrable Products Institute (BPI). 


Did you know that organics wasted at landfills constitute the largest component of municipal solid waste? When landfilled, those wasted organics result in the emission of super-pollutant methane.  We are focused on eliminating these current practices with an efficient and effective circular economy solution, using naturally occurring bacteria to produce biogas, a renewable fuel.  Given this process, at a 600,000 tpy processing facility, TNRE will reduce the greenhouse gas emissions of organic waste by over 80,000 MT of CO2e per annum. This is equivalent to removing over 17,000 cars from the road annually How do we do this?

Through a process utilizing AD – a controlled decomposition of organic resources in an oxygen‐free environment, resulting in a biogas containing mostly methane which is upgraded to biomethane as a replacement of fossil-derived natural gas and can be utilized as a vehicle fuel or injection in to the pipeline. A 300,000 tons per year facility will produce ~ 500,000 MMBtu of RNG per annum


We want to change the way waste is collected and disrupt how we think about recycling. By reusing and repurposing organics, diverted from our landfills, TNRE is creating useful, sustainable by-products including a solid soil amendment organic compost.

The Benefits of High-Quality Compost*

Producing large quantities of organically-certified compost and soil amendment, servicing regional agricultural, farming and landscaping needs.  At full build-out, a 600,000 tpy processing facility will produce ~ 240,000 tons of organic compost per year. 

We know that compost inspires microbes to improve soil structures so that 1) soils both hold and transmit water, and 2) nutrients are retained, leading to improved plant growth. The more we learn about the collective power of compost the more we know compost helps to increase the organic matter in the soil, water holding capacity and improves overall soil health.  

Recent research shows that compost application is a carbon sequestering method plus, TNRE compost will enable a circular economy keeping nutrients in the loop, helping to reduce pesticide usage, and synthetic fertilizers

*Note: TNRE compost will not contain biosolids – a heavy metal source

*Note: TNRE processing facilities will accept compostable material (certified IBI) from commingled residential and commercial routes. In the event an item looks like a plastic or bio-plastic, those items will be deemed as contamination and removed during the pre-processing stage.