Spent mushroom substrate is capable of physisorption-chemisorption of CO2

Author(s)

Alves, Lucas da Silva ^[1] ; de Almeida Moreira, Bruno Rafael ^[2] ; Viana, Ronaldo da Silva ^[3] ; Dias, Eustaquio Souza ^[4] ; Rinker, Danny Lee ^[5] ; Pardo-Gimenez, Arturo ^[6] ; Zied, Diego Cunha ^[3]

Affiliation

^[1] Sdo Paulo State Univ Unesp, Sch Agr & Veterinarian Sci, Dept Appl Microbiol, Jaboticabal, SP - Brazil

^[2] Sao Paulo State Univ Unesp, Sch Agr & Veterinarian Sci, Dept Engn & Exact Sci, Jaboticabal, SP - Brazil

^[3] Sao Paulo State Univ Unesp, Coll Agr & Technol Sci, Dept Plant Prod, Dracena, SP - Brazil

^[4] Univ Fed Lavras, Dept Biol, Lavras, MG - Brazil

^[5] Univ Guelph, Vineland Campus, Vineland Stn, ON - Canada

^[6] Ctr Invest Experimentac & Serv Champinon CIES, Quintanar Del Rey - Spain

• Document type: Journal article
• Source: Environmental Research; v. 204, n. A MAR 2022.
• Web of Science Citations: 0

Abstract

No in-depth investigation exists on the feasibility of integrating hydrothermal carbonization (HTC) and pelletization into the process of making spent mushroom substrate (SMS), an agro-food residue from the commercial mushroom industry, into an adsorbent for post-combustion CO2 removal. Therefore, this study analyzed if it could be possible for systematically converting low-pressure hydrochars of various SMSs into carbon-adsorbing mini-capsules. Sources of SMS included paddy straw and achiote capsule shell from Pleurotus ostreatus; eucalyptus sawdust and grassy straw from Lentinula edodes; and compost containing peat or soil as casing layer from Agaricus subrufescens. The eucalyptus sawdust and grassy straw from L. edodes outperformed the other biomaterials in adsorbing CO2 , and thus effectively encapsuled most of the gas, 8.25 mmol g(-1) and 8.10 mmol g(-1) , respectively. They contained mostly hetero-atoms of O and N, requiring less unit energy to bind acidic molecules of CO2 at the alkaline sites. The amount of unit energy the pore-filling process demanded at 25 degrees C was 12.65 kJ mol(-1) , an attribute of self-sustaining and saleable physisorption. A negative 6.80 kJ mol(-1) free energy validated both spontaneity and exothermal of biocarbons at steady-state atmosphere. The major findings and innovations of our study support utilizing SMS as an adsorbent as a carbon capture, storage and utilization networking. Our insights into the physisorption-chemisorption on SMS are timely and relevant to help manage the re-use of SMS, and thus bring the global mushroom industry closer to environmental sustainability and toward a lower carbon society and circular economy. (AU)

• FAPESP's process: 17/24234-1 - Energy efficiency of biomass from first-generation and second-generation bioethanol production with glycerin added during pellets production
• Grantee: Ronaldo da Silva Viana
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
• FAPESP's process: 15/15306-3 - Techniques and processes in mushrooming: supplementation of compost and utilization of spent mushroom in the agriculture
• Grantee: Diego Cunha Zied
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 19/19866-4 - New alternatives for sustainable integrated systems: agronomic and microbial aspects of maize after cultivation of sun mushroom in field
• Grantee: Lucas da Silva Alves
• Support Opportunities: Scholarships in Brazil - Master