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AMMONIA DISPERSION FROM MULTI-FLOOR VERSUS STANDARD SINGLE-FLOOR PIG PRODUCTION FACILITIES BASED ON COMPUTATIONAL FLUID DYNAMICS SIMULATIONS

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Frontiers of Agricultural Science and Engineering 2023年第3期10卷 374-389页

作者： Yicong XIN Li RONG Gunther SCHAUBERGER Dejia liu Xiusong LI Zhihua YANG Songming ZHU dezhao liu Key Laboratory of Equipment and Informatization in Environment Controlled Agriculture Ministry of Agriculture and Rural AffairsKey Laboratory of Intelligent Equipment and Robotics for Agriculture of Zhejiang ProvinceInstitute of Agricultural Bio-Environmental EngineeringCollege of Biosystems Engineering and Food ScienceZhejiang UniversityHangzhou 310058China Department of Civil and Architectural Engineering—Building Science Aarhus UniversityAarhus C 8000Denmark WG Environmental Health Unit for Physiology and BiophysicsUniversity of Veterinary MedicineA-1210 ViennaAustria Big Herdsman Machinery Co. Ltd.Qingdao 266000China Zhejiang Huatong Meat Products Co. Ltd.Yiwu 322000China

Multi-floor buildings for raising pigs have recently attracted widespread attention as an emerging form of intensive livestock production especially in eastern China,due to the fact that they can feed a much larger number of animals per unit area of land and thus alleviate the shortage of land available for standard single-floor pig production ***,this more intensive kind of pig building will pose new challenges to the local environment in terms of pollutant *** compare the dispersion air pollutants(ammonia as a representative)emitted from multi-versus single-floor pig buildings,ammonia dispersion distance and concentration gradients were investigated through three-dimensional simulations based on computational fluid *** validation of an isolated cubic model was made to ensure the simulation method was *** effects of wind direction,wind speed and emission source concentration at 1.5 m(approximate human inhalation height)during summer were *** results showed that the ammonia dispersion distance of the multi-floor pig building was far greater than that of the single-floor building on a plane of Z=1.5 *** the wind direction was 67.5°,the wind speed was 2 m·s^(−1) and the emission source concentration was 20 ppmv,the dispersion distance of the multi-floor pig building could reach 1380 ***,the ammonia could accumulate in the yard to 7.68 ***,future site selection,wind speed and source concentration need to be given serious *** on the simulation used in this study with source concentration is 20 ppmv,the multi-floor pig buildings should be located 1.4 km away from residential areas to avoid affecting *** results of this study should guidance for any future development of multi-floor pig buildings.

关键词： pig building computational fluid dynamics ammonia dispersion

Recent advances in application of moving bed bioreactors for wastewater treatment from recirculating aquaculture systems: A review

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Aquaculture and Fisheries 2022年第3期7卷 244-258页

作者： Abubakar Shitu Gang liu Aliyu Idris Muhammad Yadong Zhang Musa Abubakar Tadda Wanhe Qi dezhao liu Zhangying Ye Songming Zhu Institute of Agricultural Bio-Environmental Engineering College of Bio-systems Engineering and Food ScienceZhejiang UniversityHangzhou310058China Key Laboratory of Equipment and Informatization in Environment Controlled Agriculture Ministry of AgricultureHangzhou310058China Department of Agricultural and Environmental Engineering Faculty of EngineeringBayero UniversityKanoNigeria

In recent years,government investments in implementing restrictive public policies on the treatment and discharge of effluents from the aquaculture industry have ***,efficient and cleaner methods for aquaculture production are *** aquaculture systems(RAS)offers water conservation by recycling the treated aquaculture water for *** wastewater treatment using a moving bed bioreactors(MBBRs)process has been considered well suited for maintaining good water quality,thereby making fish farming more ***,improvements were achieved in tackling the influence of salinity,organic matter,disinfectant,and bioreactor start-up process on the MBBR performance *** review highlights an updated overview of recent development made using MBBR to treat the residual water from ***,nitrification and simultaneous nitrification-denitrification(SND),and other hybrid processes for nitrogen removal were ***,future challenges and prospects of MBBRs in RAS facilities that need to be considered were also proposed.

关键词： Ammonia removal Biofilm carriers Sustainability Salinity Nitrogenous compound Accelerated start-up

Light spectrum preference of Nile Tilapia (Oreochromis niloticus) under different hunger levels

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International Journal of Agricultural and Biological Engineering 2019年第5期12卷 51-57页

作者： Guang Jin Jian Zhao Yadong Zhang Gang liu dezhao liu Songming Zhu Yufang Shao Zhangying Ye College of Biosystems Engineering and Food Science Zhejiang UniversityHangzhou 310058China

In order to improve the light welfare of Nile tilapia in aquaculture,the influence of hunger level on light spectrum preference of Nile tilapia was explored in this *** whole experiment was based on the emptying of the gastrointestinal contents,and carried out under the controlled laboratory *** light spectrum preference was assessed by counting the head location of fish in each experimental tank,which containing seven compartments(i.e.,red,blue,white,yellow,black,green and public area).t-Distributed Stochastic Neighbor Embedding(t-SNE)was adopted to visualize the hunger level-based dynamic preference on light spectrum in two-dimensional *** to the clustering results,significant differences in light spectrum preferences of Nile tilapia,under the different hunger levels,were *** addition,the average visit frequency in green compartment was significantly lower than that in other color compartments throughout the whole experiment,and the total visit frequency in red compartment was relatively higher during the whole experiment.

关键词： light welfare Nile tilapia hunger level light spectrum preference t-Distributed Stochastic Neighbor Embedding

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基于嗅觉的臭气浓度测定方法综述

环境化学 2023年第1期42卷 222-230页

作者：刘德钊朱怀群浙江大学生物系统工程与食品科学学院杭州310058 农业农村部设施农业装备与信息化重点实验室杭州310058

畜禽养殖、垃圾填埋、化工、市政等活动产生的大量臭气,不仅会影响居民的日常生活,甚至可能会影响人体的健康.世界上很多国家制定了臭气的排放标准,将臭气浓度作为评价臭气的重要指标,并制定了臭气浓度测定的标准化方法,但现行的方法存... 详细信息

畜禽养殖、垃圾填埋、化工、市政等活动产生的大量臭气,不仅会影响居民的日常生活,甚至可能会影响人体的健康.世界上很多国家制定了臭气的排放标准,将臭气浓度作为评价臭气的重要指标,并制定了臭气浓度测定的标准化方法,但现行的方法存在耗时长、测定结果不准确等问题,使得臭气排放难以获得有效监管.本文介绍了基于嗅觉的臭气浓度测定方法,分析了各方法的适用范围及优劣势,指出了测定方法中存在的问题并提出可能的解决途径,为进一步完善测定方法提供了参考.

关键词：臭气浓度嗅觉测定现场嗅辨.

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Functionalization design of zinc anode for advanced aqueous zinc-ion batteries

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SusMat 2024年第2期4卷 89-124页

作者： Ziyi Feng Yang Feng Fangfang Fan dezhao Deng Han Dong Shude liu Ling Kang Seong Chan Jun Ling Wang Jing Zhu Lei Dai Zhangxing He School of Chemical Engineering North China University of Science and TechnologyTangshanChina State Key Laboratory of Advanced Chemical Power Sources College of ChemistryNankai UniversityTianjinChina Shanghai Frontiers Science Center of Advanced Textiles College of TextilesDonghua UniversityShanghaiChina Shanghai Key Laboratory of Multidimensional Information Processing East China Normal UniversityShanghaiChina School of Mechanical Engineering Yonsei UniversitySeoulSouth Korea

Rechargeable aqueous zinc-ion batteries(AZIBs)offer high energy density,low cost,and are environmentally friendly,rendering them potential energy storage ***,dendrite growth on the zinc anode and numerous side reac-tions during operation challenge their *** advancements have introduced various materials for the functionalization of zinc *** developments effectively mitigate the performance degradation of zinc anode,enhancing both its cycle stability and the overall performance of ***,the construction of functionalized zinc anodes is discussed,current materials(including organic,inorganic and their composites)for modified zinc anodes are categorized,and the protective mechanism behind functionalized zinc anodes is *** study concludes by outlining the characteristics of materials suitable for dendritic-free zinc anode construction and the prospects for future development directions of functionalized zinc anodes in AZIBs.

关键词： anode functionalization inorganic materials organic materials zinc-ion batteries

外源性心肌球样细胞外囊泡Y RNA片段改善小鼠心肌缺血再灌注损伤的作用机制研究

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天津医药 2023年第6期51卷 601-606页

作者：刘德昭罗小志黄锋广西医科大学第一附属医院心血管内科 530021

目的探讨心肌球样细胞外囊泡Y RNA片段(EV-YF1)改善心肌缺血再灌注损伤的作用机制。方法将18只C57BL/6J小鼠按随机数字表法分为Sham组、MIRI组和EV-YF1组,每组6只。MIRI组与EV-YF1组建立心肌缺血再灌注模型,再灌注10 min后夹闭主动脉,EV... 详细信息

目的探讨心肌球样细胞外囊泡Y RNA片段(EV-YF1)改善心肌缺血再灌注损伤的作用机制。方法将18只C57BL/6J小鼠按随机数字表法分为Sham组、MIRI组和EV-YF1组,每组6只。MIRI组与EV-YF1组建立心肌缺血再灌注模型,再灌注10 min后夹闭主动脉,EV-YF1组左心室心腔内注射EV-YF15μg,MIRI组左心室注射等体积不加入EV-YF1的DharmaFECT4。24 h后伊文思蓝/氯化三苯基四氮唑(TTC)双染色检测心肌梗死面积;HE染色观察心肌组织病理学形态;酶联免疫吸附试验检测外周血白细胞介素(IL)-1β、IL-6、肿瘤坏死因子-α(TNF-α);实时荧光定量PCR检测心肌组织IL-1β、IL-6、TNF-αmRNA表达水平;Western blot检测心肌组织B淋巴细胞瘤-2(Bcl-2)、Bcl-2相关的X蛋白(Bax)、胱天蛋白酶(Caspase)-3蛋白表达水平;TUNEL染色检测心肌细胞凋亡情况。结果与Sham组相比,MIRI组可见明显梗死区域,心肌组织损伤明显,外周血中IL-1β、IL-6和TNF-α水平明显上调,心肌组织中IL-1β、IL-6和TNF-αmRNA表达升高,Bcl-2、Bax、Caspase-3蛋白表达升高(P<0.05),TUNEL核染阳性细胞数量明显增多;与MIRI组相比,EV-YF1组小鼠MIRI后梗死面积比值缩小,心肌损伤减轻,血清IL-1β、IL-6和TNF-α水平降低,心肌组织中IL-1β、IL-6、TNF-αmRNA表达降低,Bcl-2蛋白表达升高,而Bax和Caspase-3蛋白表达下降(P<0.05),TUNEL核染阳性细胞数量减少。结论EV-YF1可通过减轻炎症反应及抑制心肌细胞凋亡,改善小鼠心肌缺血再灌注损伤。

关键词：细胞外囊泡心肌再灌注损伤细胞凋亡白细胞介素6 肿瘤坏死因子α EV-YF1

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MBBR填料及其改性方法研究进展

工业水处理 2023年第3期43卷 23-30页

作者：肖天宇王凯武道吉刘德钊山东建筑大学市政与环境工程学院山东济南250101 浙江大学农业生物环境工程研究所农业农村部设施农业装备与信息化重点实验室浙江省农业智能装备与机器人重点实验室浙江杭州310058

移动床生物膜反应器(MBBR)由于具有结构紧凑、操作简单、运行稳定和反应速度快的优点,在污水处理工艺领域得到了广泛关注。填料在MBBR反应器中起着至关重要的作用,它直接影响生物膜的生长,进而影响处理效率。介绍了无机填料、有机高分... 详细信息

移动床生物膜反应器(MBBR)由于具有结构紧凑、操作简单、运行稳定和反应速度快的优点,在污水处理工艺领域得到了广泛关注。填料在MBBR反应器中起着至关重要的作用,它直接影响生物膜的生长,进而影响处理效率。介绍了无机填料、有机高分子填料和天然可降解高分子填料3种类型的填料并对不同类型填料的水处理效能进行了分析比较,总结得出聚乙烯填料是MBBR工艺的首选工程应用材料,但其也与其他种类材料一样存在处理效率需进一步提升等问题。基于此,针对原始填料,深入分析了填充改性、共混改性、物理改性、化学改性及复合改性等填料改性方法在废水生物处理优化和反应器效率提升中的应用,提出开发商业生产经济可行的亲水性有机填料和营养缓释型填料并尽快实现工程化应用为该领域未来的重点研究方向。

关键词：污水处理移动床生物膜反应器填料改性方法

新型光纤生物传感器的构建及在食品污染物检测中的应用

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化学进展 2024年第1期36卷 120-131页

作者：黄家麟秦垚华唐盛孔德昭刘畅江苏科技大学环境与化学工程学院镇江212003 江苏科技大学粮食学院镇江212003

食品安全与人们的生活质量息息相关,简便、灵敏及智能化的食品污染物检测方法是食品安全和健康管理的重要保障。传统的分析方法存在检测过程耗时长、成本较高、操作复杂等局限性。基于光与流体相互作用所构建的光纤生物传感器具有信号... 详细信息

食品安全与人们的生活质量息息相关,简便、灵敏及智能化的食品污染物检测方法是食品安全和健康管理的重要保障。传统的分析方法存在检测过程耗时长、成本较高、操作复杂等局限性。基于光与流体相互作用所构建的光纤生物传感器具有信号灵敏、检测快速、实时响应等特点,是近年来兴起的具有多样化功能和高灵敏性的先进光学传感方法,能够实现对食品中各类污染物地快速、精准检测。本文总结了各类新型光纤生物传感器的基本原理、分类及研究现状,综述了其在食品中真菌毒素、重金属离子、抗生素、农药残留物等各类污染物检测方面的应用进展,并展望了这种新型生物传感策略的发展趋势。

关键词：光纤生物传感器食品污染物高灵敏检测

膜曝气生物膜反应器处理生活污水的脱氮性能研究进展

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环境污染与防治 2023年第12期45卷 1716-1723页

作者：陈阳漫秦庆东谢迎龙刘德钊东南大学土木工程学院江苏南京211189 申能环境科技有限公司浙江杭州311100 农业农村部设施农业装备与信息化重点实验室浙江省农业智能装备与机器人重点实验室浙江大学农业生物环境工程研究所浙江杭州310058

膜曝气生物膜反应器(MABR)作为一项将膜技术与生物处理技术相结合的新型污水处理技术,与传统生物处理技术相比,凭借其极高的氧传输效率而大大降低电耗以及提高水处理效果,成为污水处理领域新的研究热点之一。由于MABR特殊的生物膜结构,... 详细信息

膜曝气生物膜反应器(MABR)作为一项将膜技术与生物处理技术相结合的新型污水处理技术,与传统生物处理技术相比,凭借其极高的氧传输效率而大大降低电耗以及提高水处理效果,成为污水处理领域新的研究热点之一。由于MABR特殊的生物膜结构,使其传质性能优于传统生物膜,并且能够凭借同步硝化反硝化实现高效脱氮除碳的目的。膜组件作为MABR的核心单元,是气体依附膜孔向液相扩散的媒介,同时也是微生物生长的载体。具有特殊结构的膜材料能形成利于脱氮除碳的特殊生物膜结构,从而使MABR实现高效运行。分析了异向传质生物膜结构,论述了MABR运行的基本原理,总结了不同膜材料和运行参数对生活污水MABR脱氮运行性能的影响,并对MABR的研究趋势进行了展望。

关键词：膜曝气生物膜反应器膜组件生物膜技术生活污水脱氮