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Efficiency and bacterial populations related to pollutant removal in an upflow microaerobic sludge reactor treating manure-free piggery wastewater with low COD/TN ratio

  • Harbin Institute of Technology
  • Centre de recherche industrielle du Québec

Research output: Contribution to journalReview articlepeer-review

Abstract

A novel upflow microaerobic sludge reactor (UMSR) had proved excellent in nitrogen removal from manure-free piggery wastewater characterized by high concentration of ammonium (NH4+-N) and low chemical oxygen demand (COD) to total nitrogen (TN) ratio, but the biological mechanism in the UMSR was still indeterminate. With a constant nitrogen loading rate of 1.10kg/(m3d) at hydraulic retention time 8h, the UMSR was kept performing for 67days in the present research and the average load removal of COD, NH4+-N and TN was as high as 0.72, 0.76 and 0.94kg/(m3d), respectively. Compared with the inoculated sludge, the acclimated sludge was richer in genera responsible for the biological removal of carbon, nitrogen and phosphorus. Ammonium oxidation bacteria, heterotrophic denitrifiers, autotrophic denitrifiers and phosphate accumulating organisms coexisted perfectly in the microaerobic system, and their synergistic action made the UMSR perform well in COD, NH4+-N, TN and phosphate removal.

Original languageEnglish
Pages (from-to)166-173
Number of pages8
JournalBioresource Technology
Volume201
DOIs
StatePublished - 1 Feb 2016

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

Keywords

  • High-throughput sequencing
  • Microaerobic condition
  • Microbial community structure
  • Nitrogen removal
  • Piggery wastewater

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