Effects of temperature and inoculation ratio on methane production and nutrient solubility of swine manure anaerobic digestion

Leipeng Cao, Harold Keener, Zhenghua Huang, Yuhuan Liu, Roger Ruan, Fuqing Xu

Research output: Contribution to journalArticlepeer-review

Abstract

This study investigated the effects of temperature and volatile solids (VS) ratio of feedstock to inoculum (F/I ratio) on methane (CH4) production and the solubility of nitrogen (N), phosphorus (P), cooper (Cu), and Zinc (Zn) after anaerobic digestion (AD) of swine manure. The highest cumulative CH4 yield of 470 L/kgVSfeed was obtained with F/I ratios of 2.0 and 3.0 with mesophilic (37 °C) temperature, and methane production rate decreased with the increase of F/I ratio. As F/I ratio increased from 0.5 to 4.0, the lag phase for methane production increased from 1.02 days to 13.52 days, indicating an initial inhibition at high F/I ratios. AD increased the concentrations of ammonia, Cu and Zn in the AD effluent supernatant, while decreased total and water extractive P concentrations. The changes of ammonia, Cu, Zn, and P concentrations were more significant with the increase of F/I ratio.

Original languageEnglish (US)
Article number122552
JournalBioresource Technology
Volume299
DOIs
StatePublished - Mar 2020
Externally publishedYes

Bibliographical note

Funding Information:
The project is supported by Ohio Department of Higher Education Harmful Algal Bloom Research Initiative; the National Natural Science Foundation of China (21466022, 21878139); the Young Talent Supporting Program Starting Fund of Xi'an Jiaotong University; and the National Study Abroad Fund in China.

Funding Information:
The project is supported by Ohio Department of Higher Education Harmful Algal Bloom Research Initiative; the National Natural Science Foundation of China ( 21466022 , 21878139 ); the Young Talent Supporting Program Starting Fund of Xi'an Jiaotong University; and the National Study Abroad Fund in China.

Publisher Copyright:
© 2019 Elsevier Ltd

Keywords

  • Ammonia
  • Anaerobic digestion
  • Heavy metals
  • Nutrient solubility
  • Phosphorus
  • Swine manure

PubMed: MeSH publication types

  • Journal Article

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