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Shubiao Wu

Integrated approach to sustain biogas production in anaerobic digestion of chicken manure under recycled utilization of liquid digestate: Dynamics of ammonium accumulation and mitigation control

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  • Shubiao Wu
  • Ping Ni, China Agricultural University
  • ,
  • Jiaxi Li, China Agricultural University
  • ,
  • Hao Sun, China Agricultural University
  • ,
  • Yanfei Wang, China Agricultural University
  • ,
  • Hongzhen Luo, China Agricultural University
  • ,
  • Jacek Dach, Poznan University of Life Sciences
  • ,
  • Renjie Dong, China Agricultural University

The dynamics of ammonium accumulation and mitigation control in anaerobic digestion of chicken manure under the recycled utilization of liquid digested slurry were investigated by using an integrated approach in two laboratory-scale semi-continuously stirred tank reactors. In the reactor with direct recycled utilization of the anaerobic digested liquid slurry, total volatilized fatty acids (in CH3COOH) and NH4 +-N increased from 1600mg/L to 8000mg/L and from 2600mg/L to 5000mg/L, respectively. The daily volumetric biogas production decreased from 1.4±0.1L/(L·d) to 0.8±0.1L/(L·d) with a reduction efficiency of 43±4%. Air stripping was integrated for ammonium mitigation of recycled liquid digested slurry and was shown to effectively reduce the ammonium to 3000mg/L. Correspondingly, the biogas production was recovered back to 1.4±0.1L/(L·d). This indicated the potential of the integration of air stripping for ammonium mitigation in an anaerobic digestion process with liquid digested slurry recirculation.

OriginalsprogEngelsk
TidsskriftBioresource Technology
Vol/bind205
Sider (fra-til)75-81
Antal sider7
ISSN0960-8524
DOI
StatusUdgivet - 1 apr. 2016
Eksternt udgivetJa

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