Effects of Hydrolysis and Torrefaction on Pyrolysis Product Distribution of Spent Mushroom Compost (SMC)

Poland, being the 3rd largest and growing producer of mushrooms in the world, generates almost 25% of the total European production. The generation rate of waste mushroom spent compost (MSC) amounts to 5 kg per 1 kg of mushrooms produced. We proposed the MSC treatment via torrefaction for the production of solid fuel—biocoal. In this research, we examined the MSC torrefaction kinetics using thermogravimetric analyses (TGA) and we tested the influence of torrefaction temperature within the range from 200 to 300 °C and treatment time lasting from 20 to 60 min on the resulting biocoal’s (fuel) properties. The estimated value of the torrefaction activation energy of MSC was 22.3 kJ mol−1. The highest calorific value = 17.9 MJ kg−1 d.m. was found for 280 °C (60 min torrefaction time). A significant (p < 0.05) influence of torrefaction temperature on HHV increase within the same group of torrefaction duration, i.e., 20, 40, or 60 min, was observed. The torrefaction duration significantly (p < 0.05) increased the HHV for 220 °C and decreased HHV for 300 °C. The highest mass yield (98.5%) was found for 220 °C (60 min), while the highest energy yield was found for 280 °C (60 min). In addition, estimations of the biocoal recirculation rate to maintain the heat self-sufficiency of MSC torrefaction were made. The net quantity of biocoal (torrefied MSC; 65.3% moisture content) and the 280 °C (60 min) torrefaction variant was used. The initial mass and energy balance showed that MSC torrefaction might be feasible and self-sufficient for heat when ~43.6% of produced biocoal is recirculated to supply the heat for torrefaction. Thus, we have shown a concept for an alternative utilization of abundant biowaste (MSC). This research provides a basis for alternative use of an abundant biowaste and can help charting improved, sustainable mushroom production.

show abstract

“…Table 1. The properties of mushroom spent compost (MSC) given in the literature [1,6,[9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Proof-of-Concept of Spent Mushrooms Compost Torrefaction—Studying the Process Kinetics and the Influence of Temperature and Duration on the Calorific Value of the Produced Biocoal

2019

View full text Add to dashboard Cite

show abstract

“…One of the main studied objectives has been the bio-oil production through pyrolysis. Finney et al [88] and Garrido et al [89] compared different heat treatment technologies (pyrolysis and combustion) to determine an appropriate method of energy recovery from mushroom compost. In both cases under pyrolysis process a bio-oil with a low calorific value has been obtained.…”

Section: Thermogravimetry In Compost Bio-oil Productionmentioning

confidence: 99%

Thermogravimetry Applicability in Compost and Composting Research: A Review

et al. 2021

View full text Add to dashboard Cite

Composting could be a suitable solution to the correct treatment and hygienization of several organic waste, producing compost that can be used in agriculture. The evolution and maturity of this process has been studied using a variety of techniques. One very promising technique for these studies is thermogravimetric analysis. On the other hand, the compost can be used for a variety of purposes different to the agricultural one, such as direct energy by combustion or energy and products by pyrolysis and its suitability can be measured by thermogravimetric techniques. With these goals, a bibliographic analysis has been done, applying Preferred Reporting Items for Systematic Reviews and Meta-Analyses PRISMA methodology, to the use of thermogravimetric equipment applied to the study of composting and compost uses. According to the methodology for PRISMA systematic reviews, the following databases have been searched Google Scholar, Web of Science, Mendeley, Microsoft Academic, World Wide Science, Science Direct, IEEE Xplore, Springer Link, Scopus, and PubMed by using the terms “thermogravimetry AND (compost OR composting) AND NOT plastic”.

show abstract

“…Torrefied biomass also contains improved grindability characteristics [38]. Recent studies have reported the effect of torrefaction pretreatment on biomass pyrolysis [27,[39][40][41][42]. While studies on biomass pretreatment by hydrolysis and by torrefaction have been reported, studies on combined hydrolysis and torrefaction are still limited.…”

Section: Introductionmentioning

confidence: 98%

“…All pyrolysis experiments were performed at 500 • C. The pyrolysis vapors were directly injected into the GC/MS (gas chromatography & mass Spectrometry) using helium as the carrier gas, in which the constituents of the pyrolysis vapor were separated in the GC column and identified. The method of chromatographic separation of pyrolysis products was adapted from Patwardhan [51] and previously used in other waste biomass studies done by the research group [27,42]. Py-GC/MS analytical procedure was explained thoroughly in Reckamp et al [42].…”

Section: Analytical Fast Pyrolysismentioning

confidence: 99%

Effects of Pretreatments on Yields, Selectivity and Properties of Products from Pyrolysis of Phragmites australis (Common Reeds)

2017

Self Cite

View full text Add to dashboard Cite

Phragmites australis (PHA) is a grass-type biomass, commonly known as reed grass, which has the potential to be a valuable energy and chemical feedstock due to its high yield (4.5-7 kg biomass m −2 year −1 ). It is demonstrated that the physicochemical properties and composition of phragmites can be altered by subjecting the feedstock to a combined acid hydrolysis at various level of acid concentrations and torrefaction pre-treatment processes. In this paper, we conducted fast pyrolysis on pretreated PHA, resulting in bio-oil with significantly higher selectivity towards levoglucosenone and appreciably reduced amounts of ketones and aldehydes being produced. The experiments demonstrated that 4% H 3 PO 4 acid hydrolysis and 220 • C torrefaction combined pretreatments prior to fast pyrolysis resulted in 17 times increase of relative selectivity to levoglucosenone in the bio-oil portion along with a reduction of ketones and aldehydes relative concentrations from 23% to 13%. Pyrolysis of pretreated PHA produced higher amount of biochar. The phosphorus-enriched biochar offers a potential usage for soil amendment or sorbent material. This study presents an opportunity to convert this underutilized feedstock into valuable bio-based products. Additional in-depth investigation is essential to gather more data for assessing the economic and sustainability features of the proposed process.

show abstract

Effects of Hydrolysis and Torrefaction on Pyrolysis Product Distribution of Spent Mushroom Compost (SMC)

Cited by 5 publications

References 21 publications

Proof-of-Concept of Spent Mushrooms Compost Torrefaction—Studying the Process Kinetics and the Influence of Temperature and Duration on the Calorific Value of the Produced Biocoal

Proof-of-Concept of Spent Mushrooms Compost Torrefaction—Studying the Process Kinetics and the Influence of Temperature and Duration on the Calorific Value of the Produced Biocoal

Thermogravimetry Applicability in Compost and Composting Research: A Review

Effects of Pretreatments on Yields, Selectivity and Properties of Products from Pyrolysis of Phragmites australis (Common Reeds)

Contact Info

Product

Resources

About