Evaluation of Effective Microorganisms on home scale organic waste composting

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:216

Article; Proceedings Paper

Van Fan, Yee¹  Lee, Chew Tin^1,2  Klemes, Jiri Jaromir⁴  Chua, Lee Suan⁵  Sarmidi, Mohamad Roji^3,5  Leow, Chee Woh¹ 

[1] Univ Teknol Malaysia, Fac Chem & Energy Engn, Dept Bioproc Engn, Utm Johor Bahru 81310, Johor, Malaysia

[2] Univ Teknol Malaysia, Low Carbon Asia Res Ctr, Utm Johor Bahru 81310, Johor, Malaysia

[3] Univ Teknol Malaysia, UTM Innovat Ctr Agritechnol Adv Bioproc, Utm Johor Bahru 81310, Johor, Malaysia

[4] Brno Univ Technol VUT Brno, Fac Mech Engn, NETME Ctr, SPIL,Tech 2896 2, Brno 61600, Czech Republic

[5] Univ Teknol Malaysia, Inst Bioprod Dev, Utm Johor Bahru 81310, Johor, Malaysia

关键词: Effective microorganisms;    Food and organic waste composting;    Home scale;    Nutrient content;    Humic acid;   

DOI  :  10.1016/j.jenvman.2017.04.019

来源: Elsevier

【 摘 要 】

Home composting can be an effective way to reduce the volume of municipal solid waste. The aim of this study is to evaluate the effect of Effective Microorganism (TM) (EM) for the home scale co-composting of food waste, rice bran and dried leaves. A general consensus is lacking regarding the efficiency of inoculation composting. Home scale composting was carried out with and without EM (control) to identify the roles of EM. The composting parameters for both trials showed a similar trend of changes during the decomposition. As assayed by Fourier Transform Infrared Spectroscopy (FTIR), the functional group of humic acid was initially dominated by aliphatic structure but was dominated by the aromatic in the final compost. The EM compost has a sharper peak of aromatic C=C bond presenting a better degree of humification. Compost with EM achieved a slightly higher temperature at the early stage, with foul odour suppressed, enhanced humification process and a greater fat reduction (73%). No significant difference was found for the final composts inoculated with and without EM. The properties included pH (similar to 7), electric conductivity (similar to 2), carbon-to-nitrogen ratio (C: N < 14), colour (dark brown), odour (earthy smell), germination index (>100%), humic acid content (4.5-4.8%) and pathogen content (no Salmonella, <1000 Most Probable Number/g E. colt). All samples were well matured within 2 months. The potassium and phosphate contents in both cases were similar however the EM compost has a higher nitrogen content (+1.5%). The overall results suggested the positive effect provided by EM notably in odour control and humification. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free