Our Technology

Fengen Technology

The Fengen technology provides conversion of organic feedstocks to a more biodegradable form unlocking potential in a variety of markets.  We are initially focused in two main markets:
  • Increasing the production of RNG in the dairy sector
  • Reduction of waste to reduce hauling and disposal expense at small water resource recovery facilities (WRRFs)

Our Technology In The WRRF Sector

Small WRRFs are experiencing increased regulatory pressures, limited technical solutions, and increasing operations and maintenance budgets.  Specifically related to sludge management, disposal options are decreasing and hauling distances continue to increase.  Hauling and disposal costs continue to rise, making sludge management a significant liability.  Anaerobic digestion and biogas production are generally not economically feasible for WRRFs in the 15 mgd and smaller range.
The Fengen technology can relieve these mounting pressures by:
  • Providing a 30% - 40% sludge reduction
  • Direct electricity generation
  • Simple, modular process

Fengen provides significant benefits to solids management in the wastewater industry.  Waste activated sludge (WAS) enters the Fengen and through a biological process, the feedstock is broken down into a more biodegradable form with increased volatile fatty acid production.  The intermediate product is capable of producing direct electricity to run the process and the end solids product is reduced by 30% – 40%, dramatically lowering the cost of hauling and disposal.

WRRF Process infographic
  • Provides a 30% - 40% sludge reduction
  • Direct electricity generation
  • Product with higher gas yield per VSR
  • Simple, modular process
  • Thickened manure product increase capacity or loading capability in the digester
  • Liquid product with high nutrient value

We are strengthening the path to climate neutrality in the Dairy Sector by providing an affordable solution for small dairies to participate in the production of renewable energy.  The Fengen Boost makes RNG projects for smaller dairies and even more profitable for larger dairies.

Our Development Path

The Fengen Proof of Concept and Technology Development is complete.  We are currently in the Technology Demonstration and Product Development Phase.  We have continuously operating pilots at WRRF and dairy facilities and we look forward to scaling up to a demonstration system in late 2022.

Current focus is:

  • Defining scale-up and identifying optimal module sizes
  • Iterating on design and materials to guarantee cost affordability and robust construction
  • Validating performance for different feedstocks

Proof of concept

  • Bench scale
  • Batch Experiments (no flow)

Technology Development 2021

  • Bucket-Scale
Technology Demonstration and Product Development
  • Small Pilot Scale to Demonstration Scale
  • Unmanned Continuous Experiments
  • Automated System
Development path for Fengen infographic
Fengen logo white
Welcome to Fengen! For over 25 years, our employees have had previous working experiences within the industry, from consulting engineering to research and development, and operations jobs, as well as having backgrounds in academia.

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