Experimental Study on Degradable Organic Wastes by Catalytic Hydrothermal Degradation

Abstract:

Hydrothermal degradation (HTD) experiments of lawn-grass by the catalytic action of low acid were carried out in the pilot digestor. The effect of the low acid on treated lawn-grass products was investigated in different treatment severities. A severity parameter which combines time and temperature was introduced for comparing results among experiments. The results show that, with the severity increasing, the weight of the solid products, the hemicellulose and cellulose content remarkably decrease; the conversion rate of the organic matter increases; the HTD products by low acid catalysis reach stable in the low severities. At the same time, the soluble sugars and the acetic acid content increase until the treatment severity is over 4.05, however, and furfural content always increases in the liquid products.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 6204-6209
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.6204
• Online since: November 2011
• Authors: Shu Qing Guo, Xiang Yuan Dong
• Keywords: Degradable Organic Wastes, Hydrothermal Degradation, Lawn-Grass

References

[1] Y. H. Xiao, Wastes treatment processing with no toxicity, resource recovery, easy-sorted and no residues. China, CN1242266A, (2000).

[2] GUO S. Q., XIAO Y. H., WANG F., et al. Substance changes and maturity of different concentration hydrothermal treated wastes in soil[J]. Ecology and Environment, 2005: 14(6): 850-854.

[3] GUO S. Q., DONG X. Y., XIAO Y. H. Comparison and analysis on stability and maturity of hydrothermal-treatment products and compost in soil[J]. Ecology and Environment, 2007: 16(2), 457-461.

[4] GUO S. Q., DONG X. Y., XIAO Y. H. experimental study on lignocellulosic biomass by catalytic hydrothermal degradation. Acta energiae solaris sinica, 2008, 29(1).

[5] GUO S. Q., XIAO Y. H., TIAN W. D., et al. Energy and exergy analysis of a novel efficient combined process by hydrothermal degradation and superheated steam drying of degradable organic wastes. Journal of Thermal sicience, 2006, 15(3): 274-280.

DOI: 10.1007/s11630-006-0274-5

[6] GUO S. Q., DONG X. Y., XIAO Y. H. Analysis on drying process for hydrothermal-treatment products of degradable organic wastes[J]. Modern chemical industry, 2007, 27(10): 46-49.

[7] Overend R P, Chornet E. Fractionation of lignocellulosics by steam-aqueous pretreatment[J]. Phil. Trans. R. Soc. Lond. A, 1987, 321: 523-536.

DOI: 10.1098/rsta.1987.0029

[8] Wang Y.W., Xu W.W. Quantitative analysis procedure of lignocellulose solid substrate: hemicelluloses, cellulose and lignin. Microbiology, 1987, 2: 81-84.

[9] Standards Press of China series. Agricultural Standard Series - Volume of Soil and Fertilizer[M]. the fist edition, Standards Press of China, 1998, 483-485, 779-789.

[10] Muzzy J D, Roberts R S, Fieber C A. Pretreatment of hardwood by continuous steam hydrolysis[J]. Wood and Agriculture Residues, 1983, 351-368.

DOI: 10.1016/b978-0-12-654560-9.50023-8

[11] Heitz M, Capek-Menard E, Koeberle P G. Fractionation of populus tremuloides at the pilot plant scale: optimization of steam pretreatment conditions using the STAKE 11 technology[J]. Biores. Technol., 1991, 35: 23-32.

DOI: 10.1016/0960-8524(91)90078-x

[12] S. M. Tiquia. Evaluation of organic matter and nutrient composting of partially decomposed and composted spent pig litter. Environmental Technology, 2003, 24: 97-107.

DOI: 10.1080/09593330309385540

[13] Y. Chen, B. Chefetz,Y. Hadar. Formation and properties of humic substance originating from composts. (eds). The science of composting. Part 1. 1996, Chapman and Hall, London, 383-393.

DOI: 10.1007/978-94-009-1569-5_36