Evaluation of microbial dynamics during post-consumption food waste composting

Sanjeev Kumar Awasthi, Jonathan W C WONG, Jiao Li, Quan Wang, Zengqiang Zhang, Sunil Kumar, Mukesh Kumar Awasthi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

The objective of present study was to evaluate the efficacy of bacterial consortium to boost the microbial population and enzyme activities during post-consumption food waste (PCFWs) composting. Three treatments of PCFWs mixed with saw dust and 10% zeolite (dry weight basis) was design, where treatments T-2 and T-3 were applied with two distinctive bacterial consortium, respectively, while T-1 was served as control. The results showed that total aerobic proteolytic, amylolytic, cellulolytic, oil degrading and total aerobic bacteria populations were significantly higher in treatment T2 and T3 than T1. Consequently, the selected hydrolytic enzymes were also higher in T2 and T3 than T1, whose apparently gave the interesting information about rate of decomposition and end product stability. Furthermore, T2 and T3 showed significant correlations between the enzymatic activities and microbial population with other physico-chemical parameters. Based on germination assays and CO2-C evolution rate, T2 and T3 were considered phytotoxic free and highly stable final compost on day 56.

Original languageEnglish
Pages (from-to)181-188
Number of pages8
JournalBioresource Technology
Volume251
DOIs
Publication statusPublished - Mar 2018

Scopus Subject Areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

User-Defined Keywords

  • Bacterial consortium
  • Compost
  • Enzyme activity
  • Food waste
  • Phytotoxicity
  • Stability

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