Evaluation of compost, vegetable and food waste as amendments to improve the composting of NaOH/NaClO-contaminated poultry manure

PLoS One. 2018 Oct 11;13(10):e0205112. doi: 10.1371/journal.pone.0205112. eCollection 2018.

Abstract

Regular usage of NaOH/NaClO disinfectants results in high sodium salt and alkalinity of poultry manure. This study compared three amendments: vegetable waste (V), food waste (F) and mature compost (C) for their ability to improve the composting of NaOH/NaClO-contaminated poultry manure. C compost resulted in the highest compost temperatures (p<0.001) and greatest reduction in OM, TC, TN and NH4-N (p<0.05). C and V composts were more efficient at lowering extractable-Na (ext-Na) and electrical conductivity (EC) than F (p<0.05). Maturity was primarily indicated by NH4-N, EC and ext-Na. Bacterial dynamics was profoundly influenced by NH4-N, EC and TC, with the decrease leading to discriminate genera shift from Sinibacillus and Thiopseudomonas to Brevbacterium, Brachybacterium, and Microbacterium. These findings suggest that mature compost was more desirable amendment than vegetable and food waste in the composting of NaOH/NaClO-contaminated poultry manure, and the decrease of ext-Na indicated compost maturity but did not influence bacterial dynamics.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Ammonia / analysis
  • Animals
  • Carbon / analysis
  • Composting* / methods
  • Disinfectants* / chemistry
  • Electric Conductivity
  • Food*
  • Manure* / analysis
  • Manure* / microbiology
  • Nitrogen / analysis
  • Potassium / analysis
  • Poultry
  • Sodium / analysis
  • Sodium Hydroxide* / chemistry
  • Sodium Hypochlorite* / chemistry
  • Temperature

Substances

  • Disinfectants
  • Manure
  • Sodium Hydroxide
  • Carbon
  • Ammonia
  • Sodium
  • Sodium Hypochlorite
  • Nitrogen
  • Potassium

Grants and funding

This study was supported financially by the Research Project Foundation of Dalian University of Technology (DUT15RC(3)052 and DUT17JC35), URL:www.dlut.edu.cn; the General Research Project of Liaoning Provincial Education Department (L2015117), URL: http://www.lnen.cn/; the Scientific Research and Development Project of Panjin Industrial Technology Institute of Dalian University of Technology (PJYJY2016A009), URL: http://pjyjy.dlut.edu.cn/index.htm; and the National Natural Science Foundation of China (NSFC No.31670767 and 31400307), URL:http://www.nsfc.gov.cn/. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.