近日，云南师范大学能源与环境科学学院光伏材料李明团队国际著名、中科院一区TOP期刊《RENEWABLE ENERGY》上发表题名为《Analysis on characteristics and operation mode of direct solar collector coupled heat pump drying system》研究论文。
Analysis on characteristics and operation mode of direct solar collector coupled heat pump drying system
Yao, MC (Yao, Muchi)  ,  ; Li, M (Li, Ming)  ,  ; Wang, YF (Wang, Yunfeng)  ,  ; Li, GL (Li, Guoliang)  ,  ; Zhang, Y (Zhang, Ying)  ,  ; Gao, M (Gao, Meng)  ,  ; Deng, ZH (Deng, Zhihan)  ,  ; Xing, TY (Xing, Tianyu)  ,  ; Zhang, ZD (Zhang, Zude)  ,  ; Zhang, WX (Zhang, Wenxiang)  , RENEWABLE ENERGY
出版时间 APR 2023
在线发表 FEB 2023
2023-03-27 文献类型 Article
To solve the intermittent problem of solar drying systems, this study proposes a solar vacuum tube collector coupled heat pump drying (HPD) system that can adopt three operating modes as different climatic conditions. The performance of the system under different working modes and drying characteristics was analyzed; moreover, the system was also based on the relationship between energy supply and consumption. The results show that under load conditions, the system runs in the solar drying (SD) mode and the drying chamber temperature can reach >50 degrees C. In the HPD mode, the average heating power of the system is 11.88 kW, the heating coefficient is 2.26 and the average thermal efficiency of the heat exchanger is 39.3%. In the solar-assisted heat pump drying (SAHPD) mode, the average coefficient of performance of the system is 3.26, compared to HPD model, a 44.2% increase. The heating ratios of the SD, HPD and SAHPD modes were 37.9%, 58.5% and 3.6%, respectively. Furthermore, the Two-term models with R2 value of 0.9986 and RMSE value of 0.01038 was considered the best drying kinetics model for the vacuum tube collector coupled heat pump drying grapes. This study guides the application of SAHPD systems in agricultural products drying.
云南师范大学能源与环境科学学院生物质能徐锐团队国际著名、中科院一区TOP期刊《BIORESOURCE TECHNOLOGY》上发表题名为《Magnetic hydrochar derived from waste lignin for thallium removal from wastewater: Performance and mechanisms》研究论文。
Magnetic hydrochar derived from waste lignin for thallium removal from wastewater: Performance and mechanisms
作者:Wang, HB (Wang, Huabin)  ,  ; Duan, R (Duan, Ran)  ,  ; Ding, L (Ding, Lin)  ; Tian, L (Tian, Lin)  ,  ; Liu, Y (Liu, Ying)  ,  ; Zhang, Y (Zhang, Yong)  ,  ; Xu, R (Xu, Rui)  , BIORESOURCE TECHNOLOGY
DOI：10.1016/j.biortech.2023.128736 出版时间APR 2023 在线发表FEB 2023 已索引 2023-03-23
Waste lignin, such as black liquor (BL) from paper and pulping industries, is an agro-industrial biowaste while its reuse raised global concerns. In this work, a hydrothermal carbonization procedure was employed to convert BL into magnetic lignin-based hydrochar (MLHC) for thallium elimination from wastewater. The results exhibited water purification potential due to a wider working pH window (2-9) with the magnetization intensity of 11.12 emu/g. The maximum adsorption capacity for Tl(III) was 278.9 mg/g, while the contribution of various mechanisms was elucidated with the order: surface precipitation (31.3 %), complexation (20.6 %), physical adsorption (18.2 %), chemical reduction (15.0 %), and ion exchange (14.9 %). This study revealed that hy-drothermal treatment could be a potential and promising method to convert waste lignin into magnetic bio-adsorbent to recycle pulping black liquor and apply it for thallium pollution control.
云南师范大学能源与环境科学学院生物质能李建昌团队国际著名、中科院一区TOP期刊《CHEMOSPHERE》上发表题名为《 Distinguishing anaerobic digestion from electrochemical anaerobic digestion: Metabolic pathways and the role of the microbial community》研究论文。
Distinguishing anaerobic digestion from electrochemical anaerobic digestion: Metabolic pathways and the role of the microbial community作者:
Wang, Nan; Yang, Yutong; Xu, Kunde; Long, Xiangang; Zhang, Yurui; Liu, Hongzhou; Chen, Tiezhu; Li, JianchangChemosphere 页 138492 DOI 10.1016/j.chemosphere.2023.138492 出版时间2023-Mar-22
In this study, we explored why electrochemical anaerobic digestion (EAD) results in higher methane conversion and lower CO2 emissions than anaerobic digestion (AD). Single-chamber AD and EAD reactors were used in this experiment, and the temperature was set as the disturbance factor. Current, pH, electrode potential, gas content, and microbial community were used as indicators for our analysis. Flux balance analysis (FBA) and high-pass next-generation sequencing (NGS) were used to explore the relationships between AD and EAD methane-producing metabolic fluxes and microorganisms. The results showed that the average methane fluxes were 22.27 (AD) and 29.65 (EAD). Compared with AD, EAD had improved hydrogen-dependent CO2 reduction pathway. Trichloromonas was the dominant electricity-producing microorganism on the EAD anode film, which was closely related to the H2 flux at the cathode. Oscillibacter and Syntrophomonas were the dominant bacteria in the fermentation broth, specific to EAD. The abundance of Oscillibacter was positively correlated with the H2 flux, and the presence of Oscillibacter enhanced CO2 reduction by hydrogen. Methanosaeta was the only dominant methanogenic bacterium in AD and EAD, and its abundance was higher in the experimental group with a greater methane flux.
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