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Relevance of biochar to influence the bacterial succession during pig manure composting

Mukesh Kumar Awasthi1, Yumin Duan2, Tao Liu2

  • 1College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China; Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.

Bioresource Technology
|February 18, 2020
PubMed

Insights

Adding pig manure biochar amendment (PMBA) to pig manure and wheat straw composting significantly boosted bacterial abundance. The 6% PMBA addition resulted in the most diverse and abundant bacterial communities in the compost.

Area of Science:

  • Environmental Microbiology
  • Soil Science
  • Waste Management

Background:

  • Composting is a vital process for recycling organic waste, such as pig manure (PM) and wheat straw (WS).
  • Biochar amendments can potentially enhance composting efficiency and microbial community development.

Purpose of the Study:

  • To investigate the effect of pig manure biochar amendment (PMBA) on bacterial community structure during PM and WS co-composting.
  • To determine the optimal PMBA concentration for promoting microbial abundance and diversity.

Main Methods:

  • Co-composting of PM and WS with varying PMBA concentrations (0%, 2%, 4%, 6%, 10%).
  • Bacterial community analysis using 16S DNA amplicon sequencing.
  • Statistical analyses including beta-diversity, principal component analysis, and redundancy analysis.

Main Results:

  • The addition of 6% PMBA significantly enhanced bacterial community abundance compared to other treatments and the control.
  • Bacterial community composition and diversity varied distinctly with different PMBA dosages.
  • Beta-diversity analysis and principal component analysis confirmed a strong correlation between bacterial communities and increasing PMBA levels.

Conclusions:

  • Pig manure biochar amendment acts as a potent booster for bacterial communities during co-composting.
  • The 6% PMBA treatment (T4) yielded the most abundant and diverse bacterial community, indicating its potential for optimizing composting processes.
Keywords:
Bacterial communityBeta-diversityEnvironmental factorsPig manure biochar amendmentVisualization

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