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Experimental Determination of Moisture Diffusivity of Birch

IOP Conference Series: Earth and Environmental Science 2020年第4期546卷

作者： Xiao He Lianjun Wang Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological Engineering Nanjing University of Science and Technology Nanjing Jiangsu Province 210094 China

Birch is one of the renewable biomass resources. The high moisture content of raw materials increases the cost of transportation and pelletization. Drying is an effective approach to reduce the moisture content of biomass before storage and other operations to a safe and manageable level. Moisture diffusion in wood could affect the drying process significantly. In this study, the drying process of Birch materials was modeled by Fick's second law. Results from the experiment were utilized to determine the moisture diffusivity with parameter estimation. It showed that the diffusion coefficients of Birch increased from 1.2×10-7 to 9.6×10-7 m2 h-1 with the temperature ranging of 20-60°C. The trend of moisture diffusion coefficients followed Arrhenius equation with respect to temperature. For high-temperature drying, this model can help to terminate the drying process in a timely manner, thus conserving energy consumption.

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应用物联网技术加速畜禽精准饲喂:从概念到实施

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Science Bulletin 2024年第14期69卷 2156-2160页

作者：苏家宜谭碧娥蒋宗勇吴德 C.M.Nyachoti Sung Woo Kim 印遇龙王婧 Key Laboratory of Hunan Province for the Products Quality Regulation of Livestock and Poultry College of Animal Science and TechnologyHunan Agricultural UniversityChangsha 410128China Institute of Animal Science Guangdong Academy of Agricultural SciencesGuangzhou 510640China Key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China and Animal Nutrition InstituteSichuan Agricultural UniversityChengdu 611130China Department of Animal Science University of ManitobaWinnipeg R3T 2N2Canada Department of Animal Science North Carolina State UniversityRaleigh 27695USA Laboratory of Animal Nutritional Physiology and Metabolic Process Key Laboratory of Agro-Ecological Processes in Subtropical RegionNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410128China Yuelushan Laboratory Changsha 410128China

Maximizing sow reproductive performance is vital for ensuring healthy piglet supply,feed efficiency,and profitability,which requires understanding factors such as nutrition,disease control,genetics,herd management,and their *** is well documented that most reproductive issues in sows stem from extreme fluctuations in body reserves[1].Thus,optimizing reproduction should prioritize regulating body reserves and making continuous nutritional adjustments throughout a sow’s life[1,2].However,the traditional one-size-fits-all feeding strategy may not meet individual sow needs under varying *** feeding strategy leads to nutrient under-or over-feeding,which may result in a lack of performance and health issues on the one hand,and economic loss and negative environmental effects on the other.

关键词： feeding extreme reserves

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Weak magnetic field stimulated nitrite oxidizing bacteria and destroyed the SNAD process

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Bioresource technology Reports 2021年 13卷

作者： Dong, Ying Ge, Cheng-Hao Zhou, Qingxin Ni, Shou-Qing Zhu, Jiegao Lee, Taeho Ahmad, Shakeel Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University China Suzhou Research Institute Shandong University SuzhouJiangsu China Institute of Agro-Food Science and Technology Shandong Academy of Agricultural Sciences Key Laboratory of Agro-Products Processing Technology of Shandong Province Key Laboratory of Novel Food Resources Processing Ministry of Agriculture Jinan China Shandong Pacific Environmental Protection Co. Ltd. JinanShandong China Department of Civil and Environmental Engineering Pusan National University Pusan609-735 Korea Republic of Department of Soil and Environmental Sciences Muhammad Nawaz Shareef University of Agriculture Multan Pakistan

Simultaneous partial nitrification, anammox and denitrification (SNAD) process was successfully constructed in a fixed bed reactor. The ammonium and TN removal efficiencies exceeded 90% under the collaboration of ammonium oxidizing bacteria (AOB), anammox and denitrifying bacteria (DNB). However, the well cooperation was interrupted after introducing the weak MF of 3.5 mT, which was reflected directly by the increased nitrite oxidizing bacteria (NOB) activity and decreased AOB, anammox and DNB activities calculated via mass balance. Moreover, drastic microbial community structure changes induced by weak MF were observed. The dominant phylum changed from Proteobacteria (25.6%) to Deferribacteres (35.2%). The weak MF suppressed the growth of AOB (genus Nitrosomanas), anammox (genus Candidatus Brocadia and clone Anammox) and DNB (genus Denitratisoma) while promoted the enrichment of NOB (genus Nitrospira). Moreover, the weakened NH3-NH2OH, NO-N2O and N2O-N2 pathways might explain the deterioration of SNAD process caused by weak MF. © 2021 Elsevier Ltd

关键词： Nitrogen removal

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Study of U(VI) removal by sulfate reducing bacteria granular sludge under micro-aerobic condition

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Yuanzineng Kexue Jishu/Atomic Energy Science and technology 2015年第1期49卷 26-33页

作者： Xie, Shui-Bo Ma, Hua-Long Tang, Zhen-Ping Ling, Hui Zeng, Tao-Tao Chen, Sheng Wang, Jin-Song Hunan Provincial Key Laboratory of Pollution Control and Resources Technology University of South China Hengyang421001 China Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy University of South China Hengyang421001 China

The bioremediation behavior and mechanism of sulfate reducing bacteria (SRB) granular sludge which was artificially domesticated were studied. U(VI) removal by SRB granular sludge was investigated under micro-aerobic condition with the concentration of oxygen 0.6-1.0 mg/L, then the removal mechanism was analyzed with FTIR, SEM and EDS, and finally the deposit morphology of uranium was studied with the sequential extraction procedure. The results show that U(VI) removal by SRB granular sludge mainly occurs following a 2-step process which is initial adsorption(the first 30 min) and microbial reduction process. The ultimate removal rate of U(VI) reaches 98.89%. Analyses of FTIR, SEM and EDS indicate that groups-amide group, carboxyl, hydroxyl and phosphoric acid group coming from the surface of SRB granular sludge are involved in uranium deposition. Ion exchange happens between Na+ or Mg2+ and UO22+. Finally, U(VI) mainly deposites on granular sludge in the form of residual state that has poor bioavailability, bad migratory aptitude and less secondary pollution. ©, 2015, Atomic Energy Press. All right reserved.

关键词： Ion exchange

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PORK PRODUCTION SYSTEMS IN CHINA:A REVIEW OF THEIR DEVELOPMENT,CHALLENGES AND PROSPECTS IN GREEN PRODUCTION

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Frontiers of Agricultural Science and Engineering 2021年第1期8卷 15-24页

作者： Shuai ZHANG Xin WU Dandan HAN Yong HOU Jianzhuang TAN Sung Woo KIM Defa LI Yulong YIN Junjun WANG State Key Laboratory of Animal Nutrition Ministry of Agriculture and Rural Affairs Feed Industry CentreCollege of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China Key Laboratory of Agro-ecological Processes in the Subtropical Region Institute of Subtropical Agriculturethe Chinese Academy of SciencesNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionHunan Provincial Engineering Research Center for Healthy Livestock and Poultry ProductionScientific Observation and Experimental Station of Animal Nutrition and Feed Science in the South-Central RegionMinistry of Agriculture and Rural AffairsChangsha 410125China College of Resources and Environmental Sciences National Academy of Agriculture Green DevelopmentKey Laboratory of Plant-Soil Interactions(Ministry of Education)China Agricultural UniversityBeijing 100193China Tech-bank Food Co. LtdNanjing 211800China Department of Animal Science College of Agriculture and Life SciencesNorth Carolina State UniversityRaleighNC 27695USA

This paper reviews the changes in pork production in China,the largest pork producing and consuming nation in the *** pork sector in China has changed dramatically since the 1990s,with large-scale intensive pork production systems replacing the former,exclusively family-based pork production *** breeding,feeding,vaccinating,and management technologies are widely used ***,smallholders still account for a large proportion of the total *** intensification and specialization of the pork sector is expected to continue in the future,but there is increasing awareness and pressure to develop more environmentally-sustainable production *** relative shortage of domestically produced feed,the low utilization efficiency of feed ingredients,the large emissions of nitrogen and phosphorus to the environment,the high use of antibiotics,and the presence of residual metals in manures are very large challenges for the pork sector *** solve these problems,techniques including new feed resource utilization,precise feeding,low-protein diets,alternatives to antibiotics and increased manure recycling are all important topics and research directions *** new techniques and management approaches,it is possible to build more sustainable pork production systems in China.

关键词： China feed pork production sustainability

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Influence factors and stability of U (VI) removal by sulfate reducing bacteria granular sludge

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Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 2015年第6期25卷 1713-1720页

作者： Xie, Shui-Bo Chen, Sheng Ma, Hua-Long Tang, Zhen-Ping Zeng, Tao-Tao Ling, Hui Wu, Yu-Qi Hunan Provincial Key Laboratory of Pollution Control and Resources Technology University of South China Hengyang421001 China Key Discipline Laboratory of National Defence for Biotechnology in Uranium Mining and Hydrometallurgy University of South China Hengyang421001 China

The effect of initial U (VI) concentration, COD, SO42-, Cu2+ and Fe0 on U (VI) removal by sulfate reducing bacteria granular sludge (SRBGS) for U (VI) removal was investigated. The removal stability was analyzed, then the deposit valence of uranium was studied. The results show that U (VI) reduction prefers a higher COD and SO42- concentration at the range of 300-1500 mg/L. U (VI) removal is accelerated with increasing COD concentration and can be promoted when SO42- concentration is less than 1500 mg/L. The existing of Cu2+ do not affect U (VI) removal appreciably when its concentration is less than 100 mg/L, but U (VI) removal can not be inhibited completely while its concentration reaches 200 mg/L. Adding iron greatly improves U (VI) removal rate, U (VI) removal rate reaches 100% within 20 h. The SRBGS sludge can be long-term used, and the optimal hydraulic stay time (HRT) is 12.5 h. U (VI) can be reoxidized by NO3-. XPS analysis results indicate that the deposition of U element on SRBGS in main valence of U (IV). ©, 2015, Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals. All right reserved.

关键词： Bacteria

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Efficient Degradation of Sulfamethoxazole by Diatomite-Supported Hydroxyl-Modified UIO-66 Photocatalyst

SSRN

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SSRN 2023年

作者： Liu, Hui-Lai Zhang, Yu Lv, Xin-Xin Cui, Min-Shu Cui, Kang-Ping Dai, Zheng-Liang Wang, Bei Weerasooriya, Rohan Chen, Xing Key Laboratory of Nanominerals and Pollution Control of Higher Education Institutes School of Resources and Environmental Engineering Hefei University of Technology Hefei230009 China Key Lab of Aerospace Structural Parts Forming Technology and Equipment of Anhui Province Institute of Industry and Equipment Technology Hefei University of Technology Hefei230009 China Hefei University of Technology China National Centre for Water Quality Research National Institute of Fundamental Studies Hantana Kandy Sri Lanka

Sulfamethoxazole (SMX) is a widely used antibiotic to treat bacterial infections prevalent among humans and animals. SMX undergoes several transformation pathways in living organisms and external environments. Therefore, the development of efficient remediation methods for treating SMX and its metabolites is needed. We fabricated a photo-Fenton catalyst using UIO-66 (Zr) metal-organic framework (MOF) dispersed in diatomite by a single-step solvothermal method for hydroxylation (HO-UIO-66). The HO-UIO-66-0/DE assisted Fenton process shows SMX degradation at 94.7% efficiency;however, HO-UIO-66 (Zr) is not stable. We improved the stability of the catalyst by introducing a calcination step. The calcination temperature is critical to improving the catalytic efficiency of the composite (for example, designated as HO-UIO-66/DE-300 to denote hydroxylated UIO-66 dispersed in diatomite calcined at 300 °C). The degradation of SMX by HO-UIO-66/DE-300 was 93.8% in 120 min with 4 mmol/L H2O2 at pH 3 under visible light radiation. The O1s XPS signatures signify the stability of the catalyst after repeated use for SMX degradation. The electron spin resonance spectral data suggests the role of h+, •OH, •O2-, and 1O2 in SMX degradation routes. The HO-UIO-66/DE-300 assisted Fenton process shows potential in degrading pharmaceutical products present in water and wastewater. © 2023, The Authors. All rights reserved.

关键词： Catalysts

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Coagulation and Membrane Mechanism of Al Species in Removing Humic Acid: A Dynamics Process Analysis

SSRN

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SSRN 2022年

作者： Wang, Wenyu Li, Ruihua Bu, Fan Gao, Yue Gao, Baoyu Yue, Qinyan Yang, Min Li, Yi School of Environmental Science and Engineering Qilu University of Technology Shandong Academy of Sciences Jinan250353 China Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao266000 China School of Environmental and Municipal Engineering North China University of Water Resources and Electric Power Zhengzhou450000 China Marine Science Research Institute of Shandong Province Qingdao266104 China

The pH conditions affected the binding sites and complexation ability of Al species and humic acid (HA), resulting in the difference of coagulation and membrane fouling mechanism. It is important to explore the dynamic process of coagulation for the complexation mechanism of Al species and HA. In this study, three Al species (Ala/Alb/Alc) were used to control ultrafiltration (UF) process. Then, the removal efficiency of Ala for DOC was better than that of Alb and Alc, that is, the removal performance of suspended and dissolved organic matter was better for Ala. Through the analysis of coagulation dynamic process and membrane resistances, the flocs formed were smaller size and grow slowly to the equilibrium stage at pH 4, which was easy to cause membrane fouling by concentration polarization. With the pH increasing to a neutral condition, the flocs had a large size and loose structure, and then the porous cake layer was easy to be removed by physical cleaning, leading to the membrane fouling mainly due to pore plugging. Under alkaline conditions, flocs with small size and dense structure were mainly formed by sweeping, which resulted in the cake layer as the main cause of membrane fouling. This study is helpful to optimize the process of HA removal by coagulation-UF, and provides technical support for the coagulation and membrane mechanism of Al species and HA under different pH conditions. © 2022, The Authors. All rights reserved.

关键词： Coagulation

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Study on adsorption of lead and cadmium by non-burning ceramic granules from waterworks residual sludge

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IOP Conference Series: Earth and Environmental Science 2020年第1期601卷

作者： Haiyun Tang Yuanyuan Zhao Yaoyu Li Danni Liu Yuehui Chen Youze Xu Hunan Research Academy of Environmental Science Hunan Province Key Laboratory of Water Pollution Control Technology Changsha Hunan 410004 China College of Environment and Resources Xiangtan University Xiangtan 411105 China

In this experiment, the unburned ceramiste water treatment residuals (UCWTR) was prepared by the burning-free method to study its adsorption performance on Pb and Cd. Adsorption experiments show that the quality of ceramsite improved with the height of the filler layer in the reaction column, and its penetration and depletion time are prolonged. On the contrary, the driving force of mass transfer increases with the initial concentration of water in the reaction column, and the penetration and exhaustion time is shortened. The dynamic adsorption process of Pb and Cd by UCWTR is more consistent with the Thomas model and Yoon-Nelson model, and the correlation coefficient R2 is greater than 0.9. Under the condition that the initial flow rate v is 10 mL/min, the height of the packing layer h is 10 cm, and the initial concentration C0 is 150 mg/g, the fitted dynamic saturated adsorption capacities of UCWTR for lead and cadmium are 9.22 mg/g, 11.52 mg/g, the static adsorption capacity of lead and cadmium are 1.48 times and 155 times respectively. kT decreases as the height of the filler layer and the initial concentration increase; kYN decreases as the height of the filler layer increases, and increases as the initial concentration increases; the time t required to penetrate 50% of the adsorbent increases with the height of the filler layer and decreases with the increase of the initial concentration, which indicated that the solution did not reach full contact with UCWTR during the dynamic adsorption process.

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Pollinator diversity, pollination services, and conservation in agroecosystems: A mini-review on the successes and challenges in China

Integrative Conservation

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Integrative Conservation 2024年第2期3卷 104-111页

作者： Shi, Xiaoyu Huang, Dunyuan Xu, Huanli Ren, Zongxin Lu, Yanhui An, Jiandong Zou, Yi Liu, Yunhui Ouyang, Fang Chester, Douglas Mu, Junpeng He, Chunling Luo, A'rong Cheng, Rui Zhou, Qingsong Niu, Zeqing Zhou, Xin Zhao, Lei Martini, Massimo Ma, Changsheng Cheng, Wenda Chen, Xia Orr, Michael Peng, Wenjun Zhu, Chaodong CAS Key Laboratory of Zoological Systematics and Evolution Institute of Zoology Chinese Academy of Sciences Chongqing Key Laboratory of Vector Insects Chongqing Normal University College of Plant Protection China Agricultural University CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of Botany Chinese Academy of Sciences State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Key Laboratory for Insect-Pollinator Biology of the Ministry of Agriculture and Rural Affairs Institute of Apicultural Research Chinese Academy of Agricultural Sciences Department of Health and Environmental Sciences Xi'an Jiaotong-Liverpool University Beijing Key Laboratory of Biodiversity and Organic Farming College of Resources and Environmental Sciences China Agricultural University State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of Zoology Chinese Academy of Sciences Ecological Security and Protection Key Laboratory of Sichuan Province Mianyang Normal University College of Horticulture and Plant Protection Henan University of Science and Technology Nature Conservation and Landscape Ecology University of Freiburg Longping Branch Graduate School College of Biology Hunan University School of Ecology Sun Yat-sen University State Key Lab of Pest Control Sun Yat-sen University Kaihua County Apiculture Association Entomologie Staatliches Museum für Naturkunde Stuttgart Institute of Apicultural Research Chinese Academy of Agricultural Sciences College of Biological Sciences University of Chinese Academy of Sciences State Key Laboratory of Integrated Pest Management Institute of Zoology Chinese Academy of Sciences

Pollinators provide important pollination services for crops around the world. In China, numerous studies have been conducted on pollinators within agroecosystems, yet a comprehensive review of such research remains to be completed. This study discusses the existing knowledge of pollinator diversity in Chinese agroecosystems, examines the provision of pollination services, and identifies key achievements and limitations. We propose a series of conservation and management actions to promote pollinator health and ecosystem services in these agroecosystems: (1) long-term monitoring of pollinator populations, (2) designing agricultural landscapes that are conducive to pollinators, and (3) implementing microscale habitat modifications to improve conditions for pollinators. © 2024 The Authors. Integrative Conservation published by John Wiley & Sons Australia, Ltd on behalf of Xishuangbanna Tropical Botanical Garden (XTBG).

关键词： agricultural landscape crop production pollination services wild bee

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