Optimization of Energy Recovery from Cellulosic Wastewater Using Mesophilic Single-Stage Bioreactor

Samir Ibrahim Gadow, Yu You Li

Research output: Contribution to journalArticlepeer-review

Abstract

Abstract: The efficiency of single-stage biohythane production from synthetic cellulosic wastewater under mesophilic temperature was investigated. A lab-scale continuously stirred tank reactor was conducted at a hydraulic retention time of 10 days using mixed microflora without pretreatment. The experimental results show that a stable methane and hydrogen yields of 18.2 ± 0.16 and 5.6 ± 0.31 L/kg VS were maintained for 240 days, respectively with acetate/butyrate ratio of 0.39 as the main byproducts. Based on COD mass balance, more than 45% of the decomposed COD converted to bio-hythane, which means that the setting temperature 37 °C and pH improved the conditions of degradation efficiency. The energy recovery calculations indicated that the total net energy was 4.54 MJ/m3 of cellulosic wastewater. This work contributes to the limited knowledge on continuous cellulosic-hythane conversion into a safe and clean form of energy. Graphic Abstract: [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)6017-6023
Number of pages7
JournalWaste and Biomass Valorization
Volume11
Issue number11
DOIs
Publication statusPublished - 2020 Nov 1

Keywords

  • Bio-hythane
  • CSTR
  • Cellulosic wastewater
  • Fermentation
  • Mesophilic temperature

ASJC Scopus subject areas

  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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