A study of sewage sludge Co-gasification with waste shiitake substrate

Guan Bang Chen, Fang Hsien Wu, Sheng Pin Lin, Yun Ting Hsu, Ta Hui Lin

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

This study investigated the co-gasification of sewage sludge and waste shiitake substrates. The fuel properties were analyzed, and a lab-scaled bubbling fluidized-bed gasifier was used to identify the effects of the equivalence ratio (ER), gasification temperature, and blending ratio (BR) on the gas yield, lower heating value (LHV), cold gas efficiency (CGE), and carbon conversion efficiency (CCE). The results showed that a higher ER promoted the gasification of sewage sludge, while it was not conducive to gasification of shiitake substrates due to the oxidation reaction. A high gasification temperature increased the gas yield for both feedstocks. For the blended fuels, BR = 25% exhibited better gasification performance, with a maximum LHV at ER = 0.1. The effect of the BR decreased with ER, and the gasification performance was close to that of pure sludge at ER = 0.25. The CGE decreased with ER at BR = 0% and 25%, whereas it slightly increased with ER at BR = 75% and 100%. In addition, CCE increased with ER at the different blends, whereas it exhibited marginal variations for pure shiitake. Finally, an ASPEN Plus model was developed and the co-gasification characteristics of sewage sludge and waste shiitake substrates were successfully predicted.

Original languageEnglish
Article number124991
JournalEnergy
Volume259
DOIs
Publication statusPublished - 2022 Nov 15

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Modelling and Simulation
  • Renewable Energy, Sustainability and the Environment
  • Building and Construction
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Pollution
  • Mechanical Engineering
  • General Energy
  • Management, Monitoring, Policy and Law
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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