Co-liquefaction of swine manure and mixed-culture algal biomass from a wastewater treatment system to produce bio-crude oil

Wan Ting Chen, Yuanhui Zhang, Jixiang Zhang, Lance Schideman, Guo Yu, Peng Zhang, Mitchell Minarick

Research output: Contribution to journalArticlepeer-review

Abstract

This study explored the feasibility of combining two types of feedstocks, swine manure (SW) and mixed-culture algae (AW) from wastewater treatment systems, for bio-crude oil production via hydrothermal liquefaction. The effect of feedstock combination ratios on the bio-crude oil yields and qualities were investigated. SW to AW ratios (dry weight basis) were 1:3, 1:1 and 3:1 with a total solids content of 25%. Pure SW and AW were also hydrothermally converted at the same reaction condition for comparison. By combining 75% SW with 25% AW, the highest bio-crude oil yield was achieved (35.7% based on dry matter). By mixing 25% SW with 75% AW, the highest heating value (27.5. MJ/kg) was obtained. GC-MS spectra and thermal gravimetric analysis of bio-crude oils revealed that both light oils and heavy crude were produced, averaging 25% and 20% of the bio-crude oil, respectively. Analysis of energy consumption ratios indicated that co-liquefaction of AW and SW is energetically feasible and could be an economically competitive system for bio-crude oil production.

Original languageEnglish (US)
Pages (from-to)209-216
Number of pages8
JournalApplied Energy
Volume128
DOIs
StatePublished - Sep 1 2014

Keywords

  • Bio-crude oil
  • Energy consumption ratio (ECR)
  • Hydrothermal co-liquefaction
  • Nutrient recovery
  • Nutrient reuse

ASJC Scopus subject areas

  • Energy(all)
  • Civil and Structural Engineering

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