An innovative wood-chip-framework soil infiltrator for treating anaerobic digested swine wastewater and analysis of the microbial community

Bowei Zhao, Jianzheng Li, Shao Yuan Leu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

48 Citations (Scopus)


Combined anaerobic-aerobic processes are efficacious and economic approaches in treating swine wastewater. Nitrogen removal efficiency of these processes, however, is usually limited due to the low carbon/nitrogen (C/N) ratio of the wastewater. An innovative wood-chip-framework soil infiltrator (WFSI) was developed and its performance in treating anaerobic digested swine wastewater was investigated. The WFSI showed comparable removal of chemical oxygen demand (COD) and amongst the highest efficiency of nitrogen removal in treating low C/N wastewater. At a COD volume loading rate of 98.6g/m3d the WFSI could remove up to 47.7g/m3d of COD. Removal rates of NH4+-N and total nitrogen, also reached 69.1 and 30.4g/m3d, respectively, when NH4+-N loading rate was 88.4g/m3d. Biological analysis indicated that aerobic, anoxic and anaerobic microbiota occurred throughout the WFSI. Abundant cellulose and lignin decomposing bacteria could degrade the wood chips and provided extra carbon source to enhance denitrification.
Original languageEnglish
Pages (from-to)384-391
Number of pages8
JournalBioresource Technology
Publication statusPublished - 1 Dec 2014


  • Ammonia loading rate
  • Biofilter
  • Combined anaerobic-aerobic process
  • Nitrogen removal
  • Swine wastewater

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

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