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Effects of fermentation temperature and Time on fermentation Quality of Pleurotus eryngii Substrate

Chinese Journal of Animal Nutrition 2024年第12期36卷 8110-8125页

作者： Liu, Bo Lin, Lingzhu Du, Yunlong Yang, Xiaoxue Liu, Yutong Fang, Shibin Geng, Chunyin Yang, Lianyu College of Animal Science and Technology Jilin Agricultural University Changchun 130118 China College of Agriculture Yanbian University Yanji 133000 China

The purpose of this study was to investigate the effects of different fermentation temperatures and time on the fermentation quality of Pleurotus eryngii substrate, and to determine the optimum fermentation time at different fermentation temperatures by the analysis of membership function. This test is based on the annual climatic temperature conditions (at ≥0 ℃) in Jilin Province, five fermentation temperatures were designed, they were (4 ±1) ℃ (T1 group), (10 ± 1) ℃ (T2 group), (16 ± 1) ℃ (T3 group), (22 ± 1) ℃ (T4 group), (28 ±1) ℃ (T5 group), respectively. Bacillus subtilis, Lactobacillus No. 1 and Fubon active yeast were mixed to ferment the Pleurotus eryngii substrate under the above designed temperatures. The fermented spent mushroom substrate samples were collected at 0, 5, 15, 30, 45, 60, 75 and 90 days of fermentation to carry the sensory evaluation, the determination of conventional nutritional component contents and fermentation quality indexes, and membership function was used to comprehensively evaluate the fermentation effect. The test results showed as follows: 1) at the end of fermentation at 90 days, there was no deterioration of the fermented spent mushroom substrate in all groups. 2) Compared with the unfermented spent mushroom substrate, the pH of spent mushroom substrate fermented at different temperatures decreased to below 4. 2 at the 30 days after fermentation, and then began to stabilize. Under each fermentation temperature, the lactic acid content of the fermented spent mushroom substrate had significantly change with the extension of fermentation time (P fermentation time (P fermentation time (P <0.05);under different f

关键词： fermentation temperature fermentation time membership function Pleurotus eryngii substrate

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Design and preliminary experimental research on a new biogas fermentation system by solar heat pipe heating

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International Journal of Agricultural and Biological Engineering 2016年第2期9卷 153-162页

作者： Jiao Youzhou Li Pengfei Li Gang Zhang Quanguo Ding Pan Wang Shaopeng Gao Zan Du Shuangli He Chao Key Laboratory of New Materials and Facilities for Rural Renewable Energy Ministry of AgricultureCollege of Mechanical&Electrical engineeringHenan Agricultural UniversityZhengzhou 450002China Collaborative Innovation Center of Biomass Energy Henan ProvinceZhengzhou 450002China

Biogas fermentation requires appropriate temperature,while the biogas fermentation can be affected by the low ambient temperature in *** order to overcome the negative effects of low temperature fermentation,a new type of solar heat pipe biogas fermentation heating system was designed and a preliminary experiment research on this system was conducted using cow manure as the raw material at 6%concentration and total fermentation volume of 175 *** experimental results showed that when the system was in normal operation,the fermentation temperature rose every day by *** gradient will gradually become smaller with the increase of fermentation liquid temperature,and the temperature can reach 38°C after *** this solar heat pipe heating system,the fermentation liquid temperature can be increased by 5°C every sunny *** solar heat pipe heating system plays a significant role in biogas *** results of economic analysis show that the system can realize the fermentation at constant temperatures of 25°C and 35°C respectively,and it can also save standard coal equivalent of 40 kg and 80 kg in winter and spring,respectively.

关键词： Biogas fermentation solar heat pipe heating system fermentation temperature economic analysis

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