Papers by Author: Shu Qing Guo

Abstract: An overall material and energy balance analysis of hydrothermal-treatment system is conducted; a model for simulating the hydrothermal-treatment process is established. The experimental hydrothermal-treatment results of lawn-grass are used to test and prove the effectiveness of the model; and a series of technical parameters are obtained including time duration, reaction temperature, content of hemicellulose, cellulose and lignin etc.. The model can be used for technical design and operation control of lignocellulose biomass hydrothermal-treatment system.

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.

Abstract: Hydrothermal humification (HTH) is a novel way to treat biomass in order to produce soil conditioner or organic fertilizer. A plant seed germination technique was used to assess the effect of HTH material derived from garden waste on seed germination, root elongation and germination index (GI) of cucumber at different stages of incubation. The incubation experiment was carried out with the mixture of HTH material and soil at a ratio of 1:3, 1:5 and 1:10 (HTH material:soil, wet weight) in soil. The results showed there are direct positive effects of the HTH material on seed germination and root growth. GI all were over 80%. High addition rates had non significantly negative effects on plant growth.