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Effect of asparagine, corncob biochar and Fe(II) on anaerobic biological treatment under low temperature: Enhanced performance and microbial community dynamic

Journal of Environmental Management, ISSN: 0301-4797, Vol: 317, Page: 115348
2022
  • 17
    Citations
  • 0
    Usage
  • 12
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    17
    • Citation Indexes
      17
  • Captures
    12

Article Description

To ensure the efficiency of anaerobic biological treatment technology at lower temperature will expand the application of anaerobic reactor in practical industrial wastewater treatment. Through a batch experiment, asparagine, corncob biochar and Fe 2+ were selected as strengthening measures to analyze the effects on the anaerobic sludge characteristics, microbial community and functional genes in the low temperature (15 °C). Results showed that after 21 days, asparagine began to promote chemical oxygen demand (COD) removal by the anaerobic treatment, with highest COD removal rate (81.65%) observed when the asparagine concentration was 1 mmol/L. When adding 3 g biochar, 25 mg/L Fe 2+, and the combination of biochar and Fe 2+, the COD removal rates reached to 82%, 92% and 97%, respectively. In the presence of asparagine, both biochar and Fe 2+ alone or in combination increased the activity of protease (16.35%–120.71%) and coenzyme F 420 (5.63%–130.2%). The relative abundance of Proteobacteria and Methanobacterium increased in the presence of biochar and Fe 2+. In addition, the KEGG results showed that the combined addition of biochar and Fe 2+ enhanced bacterial replication and repair and promoted amino acid metabolism of archaea.

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