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Adopting green absorbent for CO_(2)capture and agricultural utilization: Biogas slurry and biomass ash case

Green Carbon 2024年第2期2卷 252-261页

作者： Feihong Liang Shihui Wei Lu Xue shuiping yan College of Life Science Yulin UniversityYulin 719000PR China College of Engineering Huazhong Agricultural UniversityWuhan 430070PR China Technology&Equipment Center for Carbon Neutrality in Agriculture Huazhong Agricultural UniversityWuhan 430070PR China Carbon Neutral College(Yulin) Northwest UniversityXi’an 710069PR China

Previously,the once-through CO_(2)chemical absorption process by biogas slurry was experimentally verified to offer the unique advantages like low energy consumption,cost-effectiveness,and feasibility of CO_(2)fixation in ***,this technology also faces some challenges and limitations,including a low CO_(2)absorption rate and *** improve the effectiveness and reliability of this innovative carbon capture,utilization,and storage(CCUS)technology,this study proposes a novel method to enhance the CO_(2)absorption performance without affecting agricultural applications of CO_(2)by mixing biogas slurry with biomass ash as the green CO_(2)*** results indicate that when the solid-liquid mass ratio of biomass ash to biogas slurry is 5:10,the CO_(2)loading of the biomass ash and biogas slurry mixture(BA-BS)reaches 936.7±59.1 mmol/***,the pH of the BA-BS remains stable at 6.9,meeting the rhizosphere pH requirements for plant *** CO_(2)absorption of the BA-BS liquid phase,referred to as improved biogas slurry(IBS),reaches its maximum at 230.4±3.5 mmol/L,which is 126.8%higher than that of the unimproved biogas *** nitrogen content in the BA-BS solid phase,calling improved biomass ash(IBA),also reaches its maximum at 4.24±0.74 mg/g,thereby expanding the agricultural utilization of biomass *** most reasonable and effective way of utilizing CO_(2)-rich mixed biogas slurry and biomass ash involves use IBA as the base fertilizer for tomato cultivation,supplemented later with IBS to promote *** optimal application allows for substantial utilization of CO_(2),introduced into the tomato cultivation environment by IBA and *** carbon fixation of a single tomato has improved by 108.2%.This study thus provides a feasible solution for high-value negative carbonization of biogas slurry and biomass ash.

关键词： Biogas slurry Biomass ash CO_(2)capture CO_(2)fixation Agricultural utilization

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以富CO_(2)吸收液为汲取液的沼液中水正渗透回收特性研究

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农业机械学报 2024年第6期55卷 317-324页

作者：汪洋石明菲贺清尧晏水平华中农业大学工学院武汉430070 农业农村部长江中下游农业装备重点实验室武汉430070

针对沼气工程存在的沼液量大难处理问题及沼气提纯的需求,提出将正渗透技术与沼气CO_(2)化学吸收分离耦合,探究了沼气CO_(2)化学吸收中的富CO_(2)吸收液作为正渗透汲取液从沼液中回收水及浓缩沼液的可行性,并以沼液浓缩过程中的水通量... 详细信息

针对沼气工程存在的沼液量大难处理问题及沼气提纯的需求,提出将正渗透技术与沼气CO_(2)化学吸收分离耦合,探究了沼气CO_(2)化学吸收中的富CO_(2)吸收液作为正渗透汲取液从沼液中回收水及浓缩沼液的可行性,并以沼液浓缩过程中的水通量、沼液浓缩倍数、沼液氨氮截留率与吸收剂反向传质通量为指标,考察了汲取液种类、汲取液浓度与其他操作参数对正渗透水回收性能的影响。结果表明,富CO_(2)吸收液作为汲取液从沼液中回收水并浓缩沼液具有可行性,且随着汲取液浓度、流量和温度的增加,沼液中水向汲取液的传质通量增加,沼液浓缩倍数也相应增加,但沼液中氨氮截留率下降,同时汲取液中的吸收剂溶质向沼液的反向传质通量也增加。当采用浓度2.5mol/L、CO_(2)负荷0.5mol/mol的富CO_(2)甘氨酸钾溶液作为汲取液,汲取液温度为70℃、流速为150mL/min、沼液室温及流速为150mL/min时,采用正渗透技术从沼液中回收水的初始通量达8.05L/(m^(2)·h),经过4h运行后,沼液浓缩倍数为1.18,氨氮截留率为84.13%,反向吸收剂通量仅为2.94g/(m^(2)·h)。

关键词：正渗透沼液浓缩水回收 CO_(2)捕获膜分离

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直接接触式膜蒸馏结晶回收沼液氨氮性能

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农业工程学报 2024年第5期40卷 239-245页

作者：张军张鸿宇周婷晏水平贺清尧华中农业大学工学院武汉430070 农业农村部长江中下游农业装备重点实验室武汉430070

为解决现有沼液氨氮膜回收技术中氮肥浓度低和副产物价值低的问题,该研究提出采用膜蒸馏结晶技术实现沼液中氨氮的结晶回收。研究中,通过提升近饱和接收液的温度来平衡膜两侧的水蒸气分压,在保证氨氮传质通量的情况下最小化水分传质。... 详细信息

为解决现有沼液氨氮膜回收技术中氮肥浓度低和副产物价值低的问题,该研究提出采用膜蒸馏结晶技术实现沼液中氨氮的结晶回收。研究中,通过提升近饱和接收液的温度来平衡膜两侧的水蒸气分压,在保证氨氮传质通量的情况下最小化水分传质。操作结束后接收液中铵盐达到超饱和状态,冷却至常温即可回收铵盐晶体。结果表明,当进料侧沼液温度为40℃时,近饱和磷酸二氢铵温度需提高至47℃,而使用硫酸为吸收剂时,近饱和硫酸铵溶液温度需提高至65℃。酸液温度升高对氨通量也有促进作用,氨通量由40℃时的10.70 g/(m^(2)·h)小幅提升至70℃时的14.90 g/(m^(2)·h)。进料侧氨氮质量浓度的提升可显著增加氨氮回收通量。磷酸二氢铵为吸收剂时,试验6 h后晶体中的氨氮回收率为77.60%,采用硫酸为吸收剂时可提高至92.20%。继续延长处理时间,晶体中的氨氮回收率甚至超过100%。显然,采用膜蒸馏结晶技术回收沼液氨氮具一定的可行性,研究结果可为沼液氨氮的高价值回收提供一定参考。

关键词：沼液结晶膜蒸馏水分传质高价值回收

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畜禽粪污处理中氨气膜接触器回收的传质及选择性研究

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农业机械学报 2024年第2期55卷 338-345页

作者：贺清尧廖婷陈号迁刘梦飞纪龙晏水平华中农业大学工学院武汉430070

对畜禽粪污好氧堆肥中产生的氨气与厌氧发酵后沼液中的氨氮进行回收,不仅可以减少污染物和温室气体的排放,达到减污降碳的目的,还能获得氮肥产品,增加粪污处理的经济性。针对现有氨气捕集过程中设备体积大和灵活性差等问题,提出了采用... 详细信息

对畜禽粪污好氧堆肥中产生的氨气与厌氧发酵后沼液中的氨氮进行回收,不仅可以减少污染物和温室气体的排放,达到减污降碳的目的,还能获得氮肥产品,增加粪污处理的经济性。针对现有氨气捕集过程中设备体积大和灵活性差等问题,提出了采用中空纤维膜来实现氨气捕集的目标。采用空气吹扫氨水溶液模拟了不同情形下的氨气浓度与空气流量,测试不同情形下氨气捕集的通量和回收率,分析影响氨气捕集的主要因素和传质特性。结果表明,氨气向膜内传质的阻力主要受气相传质阻力和膜的传质阻力影响,低空气流量下气相传质阻力占主导地位。提升空气流量至5 L/min时,气相传质阻力比0.5 L/min时下降53.6%,此时膜内传质阻力占主导。氨气捕集通量随进膜氨气浓度的增大而提升。在空气流量低于1 L/min下,氨氮回收率高于95%,0.5 L/min时的氨氮回收率高于99%。在氨气停留时间足够的条件下,氨氮回收率仅与酸液吸收容量相关。在温度差和浓度差的影响下,空气中的水蒸气会向膜内的吸收剂中传递。吸收剂中含质量分数26%的硫酸铵比仅含1%的硫铵溶液水回收通量高13.3倍,氨氮分离因子由41.6降低至3.06。酸液质量分数对氨气的传质无显著影响。文献对比表明典型状态下粪污处理中的氨气释放质量浓度与本研究中涉及的质量浓度区间基本一致,说明中空纤维膜捕集氨气具有较广的适用性。

关键词：粪污处理氨气膜吸收中空纤维膜

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VALORIZATION OF BIOGAS THROUGH SIMULTANEOUS CO_(2) AND H_(2)S REMOVAL BY RENEWABLE AQUEOUS AMMONIA SOLUTION IN MEMBRANE CONTACTOR

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Frontiers of Agricultural Science and Engineering 2023年第3期10卷 468-478页

作者： Tao SUN Wenlong LI Jiandong WEI Long JI Qingyao HE shuiping yan College of Engineering Huazhong Agricultural UniversityWuhan 430070China Technology&Equipment Center for Carbon Neutrality in Agriculture Huazhong Agricultural UniversityWuhan 430070China Key Laboratory of Agricultural Equipment in Mid-lower yangtze River Ministry of Agriculture and Rural AffairsWuhan 430070China

Upgrading biogas into biomethane not only improves the biogas utilization as vehicle fuel or natural gas substitute,but also reduces the greenhouse gases *** the principle of engineering green energy process,the renewable aqueous ammonia(RAA)solution obtained from biogas slurry was used to remove H_(2)S and CO_(2) simultaneously in the hollow fiber membrane *** was mimicked in this study using the ammonia aqueous solution mixed with some typical impurities including ethanol,acetic acid,propionic acid,butyric acid and NH4HCO_(3).Compared with the typical physical absorption(i.e.,pure water)removing 48%of H_(2)S from biogas,RAA with 0.1 mol·L^(−1) NH_(3) could remove 97%of H_(2)*** the NH3 concentration from 0.1 to 0.5 mol·L^(−1) could elevate the CO_(2) absorption flux from 0.97 to 1.72 mol·m^(−2)·h^(−1) by 77.3%.Among the impurities contained in RAA,ethanol has a less impact on CO_(2) absorption,while other impurities like CO_(2) and acetic acid have significant negative impacts on CO_(2) ***,the impurities have a less influence on H_(2)S removal efficiency,with more than 98%of H_(2)S could be removed by ***,the influences of operating parameters on acid gases removal were investigated to provide some engineering suggestions.

关键词： biomethane biogas purification CO_(2)removal H_(2)S removal membrane absorption

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EFFICIENT CONTAMINANT REMOVAL FROM LIQUID DIGESTATE OF PIG MANURE BY CHEMICAL PRECIPITATION AND CO_(2) MINERALIZATION USING ALKALINE ASH

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Frontiers of Agricultural Science and Engineering 2023年第3期10卷 479-491页

作者： Zhengxin FEI Zijie DING Xuan ZHENG Liang FENG Qingyao HE shuiping yan Long JI College of Pharmaceutics Jinhua PolytechnicJinhua 321007China Technology&Equipment Center for Carbon Neutrality in Agriculture College of EngineeringHuazhong Agricultural UniversityWuhan 430070China

Chemical precipitation is a widely applied approach for a liquid fraction of digestate(LFD)of agricultural waste but its large-scale application requires low-cost and efficient precipitating agents and novel process *** study evaluated novel approach for the efficient removal of contaminants from the LFD using fly ash-based chemical precipitation,followed by filtration and CO_(2) *** technical feasibility of this approach was evaluated using pH and electrical conductivity(EC),and removal efficiencies of total phosphorus(TP),chemical oxygen demand(COD)and heavy metals during the *** fly ash used in this study showed a promising performance as a chemical precipitation agent for COD and TP removal from the treated LFD involving complex effects of precipitation and ***_(2) bubbling after fly ash-based chemical precipitation provided further COD and TP removal by carbonation reactions between CO_(2) and the excessive alkaline minerals in fly *** addition of fly ash to untreated LFD increased pH from 8.3 to 12.9 and EC from 7.01 to 13.7 mS·cm^(−1),CO_(2) bubbling helped neutralize the treated LFD and reduce the EC,and concentrations of toxic ions by carbonation *** fly ash-based chemical precipitation and CO_(2) mineralization had>93%COD and>98%TP removal efficiencies,and resulted in an EC of<2 mS·cm^(−1) and a neutral pH in the treated LFD,as well as the high purity calcite product.

关键词： anaerobic digestion chemical oxygen demand fly ash ion removal total phosphate

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Adaptively Enhancing Facial Expression Crucial Regions via a Local Non-local Joint Network

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Machine Intelligence Research 2024年第2期21卷 331-348页

作者： Guanghui Shi Shasha Mao shuiping Gou Dandan yan Licheng Jiao Lin Xiong School of Artificial Intelligence Xidian UniversityXi'an 710000China Applied Research Laboratory Sense TimeXi'an 710000China

Facial expression recognition(FER)is still challenging due to the small interclass discrepancy in facial expression *** view of the significance of facial crucial regions for FER,many existing studies utilize the prior information from some annotated crucial points to improve the performance of ***,it is complicated and time-consuming to manually annotate facial crucial points,especially for vast wild expression *** on this,a local non-local joint network is proposed to adaptively enhance the facial crucial regions in feature learning of FER in this *** the proposed method,two parts are constructed based on facial local and non-local information,where an ensemble of multiple local networks is proposed to extract local features corresponding to multiple facial local regions and a non-local attention network is addressed to explore the significance of each local *** particular,the attention weights obtained by the non-local network are fed into the local part to achieve interactive feedback between the facial global and local ***,the non-local weights corresponding to local regions are gradually updated and higher weights are given to more crucial ***,U-Net is employed to extract the integrated features of deep semantic information and low hierarchical detail information of expression ***,experimental results illustrate that the proposed method achieves more competitive performance than several state-of-the-art methods on five benchmark datasets.

关键词： Facial expression recognition deep neural network multiple network ensemble attention network facial crucial regions

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基于鼻黏膜-海马神经免疫机制探讨醒鼻凝胶滴鼻剂对变应性鼻炎大鼠的影响

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康复学报 2024年第4期34卷 361-369页

作者：范雪琪邱彩霞颜水平庄翔莉艾斯郭丽华郑健福建中医药大学附属人民医院福建福州350004 福建中医药大学附属康复医院福建福州350003 深圳市中医院广东深圳518033

目的基于鼻黏膜-海马神经免疫机制探讨醒鼻凝胶滴鼻剂对变应性鼻炎(AR)大鼠的影响。方法选择21日龄(PND21)SPF级SD大鼠40只,采用随机数字表法分为正常组、模型组、中药组、西药组,每组10只。除正常组外,其余3组均采用卵清蛋白(OVA)致敏... 详细信息

目的基于鼻黏膜-海马神经免疫机制探讨醒鼻凝胶滴鼻剂对变应性鼻炎(AR)大鼠的影响。方法选择21日龄(PND21)SPF级SD大鼠40只,采用随机数字表法分为正常组、模型组、中药组、西药组,每组10只。除正常组外,其余3组均采用卵清蛋白(OVA)致敏的方法构建AR动物模型。造模成功后,正常组和模型组均给予生理盐水滴鼻(50μL/次),中药组给予醒鼻凝胶滴鼻剂滴鼻(50μL/次),西药组给予布地奈德鼻喷雾剂滴鼻(20μL/次),2次/d,连续治疗12 d。采用AR大鼠行为学评分标准对大鼠进行鼻炎行为学评分;采用Morris水迷宫实验评估大鼠学习记忆功能;采用酶联免疫吸附试验法(ELISA)检测血清免疫球蛋白E(IgE)、转化生长因子-β1(TGF-β1)含量;采用苏木精-伊红染色法(HE)观察鼻黏膜组织病理变化及嗜酸性粒细胞(EOS)计数;采用免疫组化法检测海马组织非受体酪氨酸激酶Fyn、P物质(SP)、血管活性肠肽(VIP)、神经肽Y(NPY)表达水平;采用实时聚合酶链式反应(RT-PCR)检测海马组织Fyn、SP、VIP、NPY mRNA转录水平。结果(1)鼻炎行为学评分:与正常组比较,模型组、中药组、西药组治疗前鼻炎行为学评分均明显更高(P<0.05);与模型组比较,中药组和西药组治疗后鼻炎行为学评分均明显更低(P<0.05)。与治疗前比较,中药组和模型组治疗后鼻炎行为学评分均明显更低(P<0.05)。(2)学习记忆功能:与正常组比较,模型组平台潜伏期、游泳总路程均明显更长(P<0.05),穿越平台次数、目标象限停留时间均明显更低(P<0.05);与模型组比较,中药组和西药组治疗后平台潜伏期和游泳总路程均明显更短(P<0.05),穿越平台次数、目标象限停留时间均明显更高(P<0.05)。(3)血清IgE、TGF-β1含量:与正常组比较,模型组血清IgE、TGF-β1含量均明显更高(P<0.05);与模型组比较,中药组和西药组治疗后血清IgE、TGF-β1含量均明显更低(P<0.05)。(4)鼻黏膜组织病理变化及EOS计数:模型组鼻黏膜水肿,上皮细胞排列紊乱;中药组和西药组治疗后鼻黏膜水肿明显减轻,上皮细胞结构较完整。与正常组比较,模型组、中药组、西药组治疗后大鼠鼻黏膜EOS计数均明显增多(P<0.05);与模型组比较,中药组和西药组治疗后鼻黏膜EOS计数均明显减少(P<0.05)。(5)海马组织Fyn、SP、VIP、NPY mRNA转录水平和蛋白表达水平:与正常组比较,模型组海马组织Fyn、SP、VIP mRNA转录水平和Fyn、SP、VIP平均OD值均明显升高(P<0.05),NPY mRNA转录水平和NPY平均OD值均明显降低(P<0.05)。与模型组比较,中药组和西药组治疗后海马组织Fyn、SP、VIP mRNA转录水平和Fyn、SP、VIP平均OD值均明显降低(P<0.05),NPY mRNA转录水平和NPY平均OD值均明显升高(P<0.05)。结论醒鼻凝胶滴鼻剂可改善AR大鼠鼻炎行为学和学习记忆功能,可能与通过Fyn信号通路调节鼻黏膜-海马神经免疫机制有关。

关键词：变应性鼻炎醒鼻凝胶滴鼻剂鼻炎行为学学习记忆功能神经免疫机制鼻黏膜海马

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LIVESTOCK AND POULTRY MANURE MANAGEMENT FROM THE PERSPECTIVE OF CARBON NEUTRALITY IN CHINA

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Frontiers of Agricultural Science and Engineering 2023年第3期10卷 341-362页

作者： Leli ZHANG Reaihan E Mahmoud MALI Hongjian LIN Shuai ZHANG Shuqin JIN Zhiping ZHU Jianjun HU Yiqing YAO Yong SUN shuiping yan Zhidan LIU Laboratory of Environment-Enhancing Energy(E2E) College of Water Resources and Civil EngineeringChina Agricultural UniversityBeijing 100083China Key Laboratory of Agricultural Engineering in Structure and Environment Ministry of Agriculture and Rural AffairsBeijing 100083China Agricultural Engineering Research Institute Agricultural Research CenterGiza 12311Egypt College of Biosystems Engineering and Food Science Zhejiang UniversityHangzhou 310058China College of Animal Science and Technology China Agricultural UniversityBeijing 100193China Research Center for Rural Economy Ministry of Agriculture and Rural AffairsBeijing 100810China Institute of Environmental and Sustainable Development in Agriculture Chinese Academy of Agriculture SciencesBeijing 100081China College of Mechanical&Electrical Engineering Henan Agricultural UniversityZhengzhou 450002China College of Mechanical and Electrical Engineering Northwest A&F UniversityYangling 712100China College of Engineering Northeast Agricultural UniversityHarbin 150030China College of Engineering Huazhong Agricultural UniversityWuhan 430070China

The rapid growth of the livestock and poultry production in China has led to a rise in manure generation,which contributes to the emissions of GHGs(greenhouse gases including CH_(4),N_(2)O and CO_(2))and other harmful gases(NH_(3),H_(2)S).Reducing and managing carbon emissions has become a critical global environmental imperative due to the adverse impacts of *** previous reviews that focused on resource recovery,this work provides an unique insight of transformation from resource-oriented manure treatment to integration of resource recovery with pollution reduction,carbon accounting and trading,focusing on the sustainable development of manure management *** the importance of accounting methodologies for carbon emission and trading system toward carbon neutrality society,suggestions and strategies including attaching high importance to the development of more accuracy accounting methodologies and more practical GHG emission reduction methodologies are given in this *** work directs the establishment of carbon reduction methodologies and the formulation of governmental policies for livestock and poultry manure management system in China.

关键词： valorization of animal manure manure management carbon emission carbon footprint methodology carbon trading

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VALORIZATION OF LIVESTOCK WASTE AND CARBON NEUTRALITY

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Frontiers of Agricultural Science and Engineering 2023年第3期10卷 333-340页

作者： Zhidan LIU Hongjian LIN Shuai ZHANG Shuqin JIN Zhiping ZHU Jianjun HU Yiqing YAO Yong SUN shuiping yan Fushuo ZHANG Laboratory of Environment-Enhancing Energy(E2E) College of Water Resources and Civil EngineeringChina Agricultural UniversityBeijing 100083China College of Biosystems Engineering and Food Science Zhejiang UniversityHangzhou 310058China College of Animal Science and Technology China Agricultural UniversityBeijing 100193China Research Center for Rural Economy Ministry of Agriculture and Rural AffairsBeijing 100810China Institute of Environmental and Sustainable Development in Agriculture Chinese Academy of Agriculture SciencesBeijing 100081China College of Mechanical&Electrical Engineering Henan Agricultural UniversityZhengzhou 450002China College of Mechanical and Electrical Engineering Northwest A&F UniversityYangling 712100China College of Engineering Northeast Agricultural UniversityHarbin 150030China College of Engineering Huazhong Agricultural UniversityWuhan 430070China National Academy of Agriculture Green Development College of Resources and Environmental SciencesChina Agricultural UniversityBeijing 100193China

Livestock production has rapidly developed along with improvements in living standards and people’s desire for a better *** livestock production is important to guarantee supply of meat,eggs and milk,and even vegetable production,in the modern society of ***,the Ministry of Agriculture and Rural Affairs jointly with the National Development and Reform Commission,the Ministry of Finance,and the Ministry of Natural Resources in China formulated and released the National Modern Facility Agriculture Construction Plan(2023‒2030)[1],which proposed the construction of modern animal husbandry facilities with efficient and intensive operations,encouraging the development of three-dimensional facility farms for pigs and poultry,and promoting using multistory buildings according to local ***,large-scale livestock and poultry farms have faced many challenges impacting its green and sustainable development,such as production environment,air quality,manure and sewage treatment and resource utilization.

关键词： husbandry jointly Rural

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