Disposal of Mixed-Organic Wastes by Continuous High-Temperature Composting

Abstract:

The present investigation was conducted to degrade mixed-organic wastes using composting with the optimal parameters of pH, temperature, the ratio of carbon and nitrogen (C/N), moisture and oxygen contents. All these procedures can be carried out within a period of 30 days. After composting, we recorded decreases in total heavy metal contents and ascarid-egg mortality, significant increases of the humus, organic matter, nitrogen, phosphorus and potassium contents and the microorganism numbers in the compost. Furthermore, 6 strains of thermophilic bacterial were isolated from the produced compost. On the basis of their small-subunit ribosomal RNA-encoding DNA (rDNA) sequences and in comparison with authentic strains, the 6 strains were identified as belonging to Paenibacillus polymyxa and Bacillus species and thereby concluded to be the dominant microflora in the composting process.

• Periodical: Advanced Materials Research (Volumes 396-398)
• Pages: 1984-1988
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.396-398.1984
• Online since: November 2011
• Authors: Feng Wu Zhao, Jian Ping Liang, Gui Rong Wang, Xiao Ming Li
• Keywords: Continuous High-Temperature Composting, Dominant Microflora, Mixed-Organic Wastes, Nutrient Composition

References

[1] US Environmental Protection Agency. Organic Materials Management Strategies. (1998), p.1.

[2] SA. Tweib, RA. Rahman, MS. Kalil. International Conference on Environment and Industrial Innovation. 12 (2011), p.124.

[3] Y. Lu, X. Wu, J. Guo. Waste Management. 29-3 (2009), p.1152.

[4] E. Pagans, R. Barrena, X. Font. Chemosphere. 62-9 (2006), p.1534.

[5] NY884-2004. Microbial organic fertilizer. Beijing, Minister of Agriculture of the People's Republic of China. (2005), p.1.

[6] MS. Pedro, S. Haruta, K. Nakamura. Journal of Bioscience and Bioengineering. 95-4 (2003), p.368.

[7] X. Li, H. Yang, B. Roy. Microbiological Research. 165-3 (2010), p.190.

[8] Z. Hu, R. Lane, Z. Wen. Waste Management. 29-1 (2009), p.180.

[9] Y. Xiao, G-M. Zeng, Z-H. Yang. Bioresource Technology. 100-20 (2009), p.4807.

[10] MAE. Hammadi, B. Hanchi. International Journal of Biological Chemistry. 5-1 (2011), p.46.

[11] Information on http://wwweco-webcom/edi/indexhtm. (2005).

[12] S. Wakase, H. Sasaki, K. Itoh. Bioresource Technology. 99-7 (2008), p.2687.

[13] HK. Zaved, MM. Rahman, MM. Rahman. KMITL Science and Technology Journal. 8-2 (2008), p.44.