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Title: Application of sludge, organic solid wastes and yard trimmings in aerobic compost piles
Authors: Chazirakis, P.
Giannis, Apostolos
Gidarakos, E.
Wang, Jing-Yuan
Stegmann, R.
Keywords: sewage sludge
yard trimmings
organic solid waste
Issue Date: 2011
Source: Chazirakis, P., Giannis, A., Gidarakos, E., Wang, J.-Y., & Stegmann, R. (2011). Application of sludge, organic solid wastes and yard trimmings in aerobic compost piles. Global NEST Journal, 13(4), 405-411.
Series/Report no.: Global NEST Journal
Abstract: The effects of different mixture ratios of sewage sludge (SS), organic fraction of municipal solid waste (OFMSW) and yard trimmings (YT) on the performance of composting process were investigated in this study. The high water content and the proper carbon/nitrogen ratio make sludge ideal for this procedure, improving the characteristics of the initial composting mixture. OFMSW and YT enable the production of a quality product that may be used as a soil conditioner. Therefore, piles of about 1 m3 were prepared by mixing OFMSW, SS and YT in four different ratios (w/w) [only OFMSW, OFMSW:SS = 2:1, OFMSW:SS:YT = 3:1:2, and OFMSW:SS:YT = 4:1:2]. The piles were kept in controlled aerobic conditions for 10 weeks. The temperature of the piles was measured daily (for the first 4 weeks) and ranged between 60-70 oC, while air was provided to the piles by mechanical turning. Results showed that the pile OFMSW:SS:GW = 3:1:2 was most beneficial in composting, since its ability to accumulate and retain heat and achieve high organic matter degradation. The final compost products contained C/N ratio less than 15 indicating that achieved mature and stable products. The heavy metal contents in the final composts were several times lower than regulation limits.
ISSN: 1790-7632
Schools: School of Civil and Environmental Engineering 
Research Centres: Nanyang Environment and Water Research Institute 
Rights: © 2011 Global NEST. This paper was published in Global NEST Journal and is made available as an electronic reprint (preprint) with permission of Global NEST. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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