Study on hydrolysis characteristics of asparagus old stem in non-closed system

doi:10.3969/j.issn.1004-1524.2020.01.17

›› 2020, Vol. 32 ›› Issue (1): 134-140.DOI: 10.3969/j.issn.1004-1524.2020.01.17

• Environmental Science • Previous Articles Next Articles

Study on hydrolysis characteristics of asparagus old stem in non-closed system

XU Suyun¹, CUI Minghao¹, YAN Yan², LI Qinfeng², WANG Yulei²

1. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China;
2. Pinghu Bureau of Agriculture and Rural Affairs, Pinghu 314200, China

Received:2019-07-19 Online:2020-01-25 Published:2020-03-11

Abstract

Abstract: The non-closed system can provide a facultative environment for the microbial hydrolysis of organic solid waste, and can effectively improve the hydrolysis efficiency of cellulose. In the present study, the feasibility of hydrolyzing asparagus old stem in a non-closed system was explored, and the effects of inoculum and aeration on the hydrolysis process and the formation of humic substances were explored. The results showed that the inoculation of cellulose bacteria accelerated the decomposition of old stems of asparagus. When the inoculation ratio was 0.3%, the maximum decomposition rates of total solids and cellulose from asparagus old stem were 75.43% and 51.03%, respectively. Infrared spectroscopy and three-dimensional fluorescence spectroscopy were used to reveal the evolution characteristics of cellulose and humic substances during hydrolysis. The humification index (HIX) and fluorescence index (FI) showed that inoculation and aeration could improve the hydrolysis and the degree of humification. The HIX of the hydrolysate was positively correlated with the germination index (GI), and the highest GI of the hydrolysate was 93.2% after 12 days. It showed that this non-closed facultative hydrolysis process could be applied independently to realize the reduction of vegetable straw.

Key words: asparagus old stem, cellulose, fulvic acid, humic substances, hydrolysis

CLC Number:

S644.6

XU Suyun, CUI Minghao, YAN Yan, LI Qinfeng, WANG Yulei. Study on hydrolysis characteristics of asparagus old stem in non-closed system[J]. , 2020, 32(1): 134-140.

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Study on hydrolysis characteristics of asparagus old stem in non-closed system

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