Development of a two-stage anaerobic co-digestion technology using nano-zero valent iron to convert high-solid mushroom-wrapped sawdust into oxygen and oxygen

Project Details


As the world's population continues to grow and various resources are gradually scarce, the concept of "recycling" is getting more and more attention, which is why biomass energy cannot be replaced by other renewable energy sources. Anaerobic fermentation is a technology that uses microorganisms to convert waste into hydrogen and biogas in an anaerobic environment. People in Taiwan love to eat mushrooms. They eat more than 100,000 tons of mushrooms a year with an output value of about 10 billion. In contrast, about 500,000 tons of spent mushroom substrate are used up a year. The wood chips wrapped in mushrooms are often disposed of by burning them in the wild or stacking, while being convenient, also causes environmental pollution. spent mushroom substrate contains a lot of cellulose, which can be put into anaerobic digestion to generate hydrogen and biogas, so as to achieve the purpose of circular economy of converting waste into biomass energy. This plan develops dry-type anaerobic fermentation to increase the content of waste treatment. Dry-type anaerobic fermentation has a high organic load capacity and requires a low reaction volume, which can reduce manpower and time costs. The disadvantage is that mass transfer due to low fluidity Poor, resulting in poor efficiency of biological reaction rate compared with wet anaerobic fermentation. This plan can accelerate the production of VFA in the hydrolysis / acidification stage by adding zero-valent iron in the anaerobic digestion system, accelerate the degradation of VFA in the methanation process, provide buffer capacity and alkalinity to reduce inhibitors in the fermentation system, and improve the overall biogas output to solve problems encountered at high solid concentrations. Finally, continuous operation is introduced to improve system stability and develop the reactor with the most economic value, and establish a system for processing spent mushroom substrate.
Effective start/end date1/06/2331/05/24

UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):

  • SDG 2 - Zero Hunger
  • SDG 7 - Affordable and Clean Energy
  • SDG 11 - Sustainable Cities and Communities
  • SDG 12 - Responsible Consumption and Production
  • SDG 17 - Partnerships for the Goals


  • spent mushroom substrate
  • Two-stage anaerobic digestion
  • Nanoscale Zero-Valent Iron
  • Bioenergy


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