Journal
BIORESOURCE TECHNOLOGY
Volume 163, Issue -, Pages 112-122Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.04.041
Keywords
Green waste; Compost; Rhamnolipid; Initial compost particle size; Two-stage composting
Funding
- Fundamental Research Funds for the Central Universities [BLYJ201405]
- Major Project of the Science and Technology of Beijing, PR China [D09040903780801]
- National Level Project Promotion of forestry scientific and technological achievements of the National Forestry Bureau [39]
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Composting is a potential alternative to green waste incineration or deposition in landfills. The effects of the biosurfactant rhamnolipid (RL) (at 0.0%, 0.15%, and 0.30%) and initial compost particle size (IPS) (10, 15, and 25 mm) on a new, two-stage method for composting green waste was investigated. A combination of RL addition and IPS adjustment improved the quality of the finished compost in terms of its physical characteristics, pH, C/N ratio, nutrient content, cellulose and hemicellulose contents, water-soluble carbon (WSC) content, xylanase and CMCase activities, numbers of culturable microorganisms (bacteria, actinomycetes, and fungi), and toxicity to germinating seeds. The production of a stable and mature compost required only 24 days with the optimized two-stage composting method described here rather than the 90-270 days required with traditional composting. The best quality compost was obtained with 0.15% RL and an IPS of 15 mm.(C) 2014 Elsevier Ltd. All rights reserved.
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