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Bioresour Technol. 2017 Dec;245(Pt A):152-161. doi: 10.1016/j.biortech.2017.08.147. Epub 2017 Aug 24.

Using cow dung and spent coffee grounds to enhance the two-stage co-composting of green waste.

Author information

1
College of Forestry, Beijing Forestry University, Beijing 100083, PR China.
2
College of Forestry, Beijing Forestry University, Beijing 100083, PR China. Electronic address: sunxy1211@163.com.

Abstract

The objective of this study was to determine the effects of cow dung (CD) (at 0%, 20%, and 35%) and/or spent coffee grounds (SCGs) (at 0%, 30%, and 45%) as amendments in the two-stage co-composting of green waste (GW); the percentages refer to grams of amendment per 100g of GW based on dry weights. The combined addition of CD and SCGs improved the conditions during co-composting and the quality of the compost product in terms of composting temperature; particle-size distribution; mechanical properties; nitrogen changes; low-molecular weight compounds; humic substances; the degradation of lignin, cellulose, and hemicellulose; enzyme activities; the contents of total Kjeldahl nitrogen, total phosphorus, and total potassium; and the toxicity to germinating seeds. The combined addition of 20% CD and 45% SCGs to GW resulted in the production of the highest quality compost product and did so in only 21days.

KEYWORDS:

Compost product; Cow dung; Green waste; Spent coffee grounds; Two-stage co-composting

PMID:
28892685
DOI:
10.1016/j.biortech.2017.08.147
[Indexed for MEDLINE]

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