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Comparison of life cycle assessment of large-scale biogas projects with different raw materials in China

International Journal of Agricultural and Biological Engineering 2024年第2期17卷 268-279页

作者： Jiazheng Sun Youpei Qu Xiaoyi Lyu Xinjie Ding Xinying Miao mukesh kumar awasthi Jingbo Qu School of Energy and Environment City University of Hong KongHong Kong 999077China College of Engineering Northeast Agricultural UniversityHarbin 150030China Key Laboratory of Agricultural Renewable Resources Utilization Technology and Equipment in Cold Areas of Heilongjiang Province Harbin 150030China College of Natural Resources and Environment Northwest A&F UniversityYangling 712100Shaanxi China

The anaerobic digestion(AD)disposal of stover and cattle manure is of great significance to the development of low-carbon economy and green energy in China,but it will also have an impact on the environment,and the degree of influence is different for various raw *** this study,life cycle assessment(LCA)methods were applied to analyze and compare the impact of corn stovers biogas projects(CSBP)and dairy manure biogas projects(DMBP)on the environment during the whole operation *** results of inventory analysis were evaluated by ReCiPe2016 Hierarchy(H)mid-point(problem-oriented)and end-point(destruction-oriented)method,*** results showed that the net energy efficiency of CSBP was higher(763.903 kW·h/FU)and the greenhouse gas(GHG)emission reduction of DMBP was more(5541.418 kg CO_(2)-eq/FU).The anaerobic digestion(AD)units have the greatest environmental impacts,and human carcinogenic toxicity is the largest environmental impact category(1.16-1.43 PE).The key to reducing environmental impact is reducing the input of chemical substances and the waste of electric *** CSBP and DMBP have a favorable impact on ecosystem quality and resources,and CSBP is more beneficial to the environment(-10.297 Pt).Co-digestion is an important measure to reduce the environmental damage from biogas *** research results provide theoretical support for the selection of raw materials for large-scale biogas projects in China,provide technical basis for reducing the impact of actual operation on the environment,and promote the resource utilization of agricultural waste and carbon dioxide emission reduction and sequestration.

关键词： life cycle assessment environmental impact assessment large-scale biogas projects bioenergy carbon dioxide emission reduction

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Synergistic effects of biochar/microbial inoculation on the enhancement of pig manure composting

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Biochar 2019年第1期1卷 127-137页

作者： Zhineng Tu Xiuna Ren Junchao Zhao Sanjeev kumar awasthi Quan Wang mukesh kumar awasthi Zengqiang Zhang Ronghua Li College of Natural Resources and Environment Northwest A&F UniversityYangling 712100ShaanxiChina Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China Ministry of AgricultureYangling 712100ShaanxiChina

With the aim to comparatively investigate the effect of the addition of additives such as biochar(BC),microbial inoculation(MI)and biochar/microbial inoculation(BCMI)on composting enhancement,nitrogen conservation,greenhouse gas emissions,the quality improvement of pig manure compost were comparatively investigated in a 42-day aerobic pig manure composting *** results showed that the duration of the thermophilic stage,the degradation of organic matter and the detoxification of the compost were enhanced in the BC,MI and BCMI treatments compared with those in the control(without additive).Moreover,the content of total Kjeldahl nitrogen in the BC,MI and BCMI treatments was increased by 38.1,48.9 and 59.0%,respectively,through the reduction of NH_(3) volatilization and N_(2)O production,which were higher than those of the control(31.8%).A reduction in CH_(4) release during composting was not observed with the MI and BCMI *** 42 days of composting,the final product of the three treatments exhibited acceptable potential for use as a fertilizer in agriculture;the BCMI treatment showed an especially synergistic effect on pig manure composting enhancement.

关键词： Compost Biochar Microbial inoculant Nitrogen loss Greenhouse gases

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Synthetic biology for sustainable food ingredients production:recent trends

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Systems Microbiology and Biomanufacturing 2023年第1期3卷 137-149页

作者： K.B.Arun A.N.Anoopkumar Raveendran Sindhu Parameswaran Binod Embalil Mathachan Aneesh Aravind Madhavan mukesh kumar awasthi Rajiv Gandhi Centre for Biotechnology JagathyThiruvananthapuram 695014KeralaIndia Department of Life Sciences CHRIST(Deemed to be University)Bengaluru 560029KarnatakaIndia Department of Zoology Centre for Research in Emerging Tropical Diseases(CRET-D)University of CalicutMalappuramKeralaIndia Department of Food Technology T K M Institute of TechnologyKollam 691505KeralaIndia Microbial Processes and Technology Division CSIR-National Institute for Interdisciplinary Science and Technology(CSIR-NIIST)Trivandrum 695019KeralaIndia School of Biotechnology Amrita Vishwa VidyapeethamAmritapuriKeralaIndia College of Natural Resources and Environment Northwest A&F UniversityYangling 712100ShaanxiChina

Problems with food security result from increased population,global warming,and decrease in cultivable *** the advancements in synthetic biology,microbial synthesis of food is considered to be an efficient alternate approach that could permit quick food biosynthesis in an eco-friendly ***,synthetic biology can be assumed to the synthesis of healthy or specially designed food components like proteins,lipids,amino acids and vitamins and widen the consumption of feedstocks,thus offering possible resolutions to high-quality food *** review describes the impact of synthetic biology for the microbial synthesis of various food ingredients production.

关键词： Synthetics biology Cell factory Metabolic engineering Food ingredients Fermentation

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Use of Biochar as an Amendment for Remediation of Heavy Metal-Contaminated Soils:Prospects and Challenges

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Pedosphere 2017年第6期27卷 991-1014页

作者： Altaf Hussain LAHORI GUO Zhanyu ZHANG Zengqiang LI Ronghua Amanullah MAHAR mukesh kumar awasthi SHEN Feng Tanveer Ali SIAL Farhana KUMBHAR WANG Ping JIANG Shuncheng College of Natural Resources and Environment Northwest A&F UniversityYangling 712100(China) Centre for Environmental Sciences University of SindhJamshoro 76080(Pakistan) Department of Biotechnology Amicable Knowledge Solution UniversitySatna 485001(India) College of Agronomy Northwest A&F UniversityYangling 712100(China)

Biochar(BC), known as the new black gold, is a stable, novel carbonaceous by-product that is synthesized through pyrolysis of biological materials in the absence of O_***, an emerging interest in the application of BC as a robust soil amendment has given rise to a broad research area in science and *** is considered a promising remediation option for heavy metal(HM)-contaminated soils to reduce HM bioavailability to *** efficacy of BC depends on the porosity, composition,pyrolysis temperature, feedstock, and residence time of *** review article aimed to present an overview of BC use in the immobilization of HMs, i.e., Cd, As, Pb, Zn, Ni, Cu, Mn, Cr, and Sb, in contaminated *** remaining uncertain factors, including the specific soil HM immobilization mechanisms, long-term beneficial effects, and potential environmental risks associated with BC application are *** research must be conducted to ensure that the management of environmental pollution is in accord with ecological sustainability and adaptation of the black gold biotechnology on a commercial basis for immobilization of HMs in contaminated soils.

关键词： additives environmental pollution feedstock immobilization pyrolysis temperature remediation efficacy

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添加钙基膨润土对猪粪堆肥中水溶性有机物光谱特征的影响

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光谱学与光谱分析 2018年第6期38卷 1856-1862页

作者：任秀娜王权赵军超李荣华 mukesh kumar awasthi 王美净张增强西北农林科技大学陕西杨陵712100

为了探究添加钙基膨润土(CB)对猪粪好氧堆肥过程中水溶性有机物(DOC)动态变化的影响,向猪粪和木屑混合物料中添加不同质量比的CB,采用自制的强制通风好氧发酵装置,进行了为期60天的好氧堆肥试验。定期采集堆肥样品并进行冷冻干燥,通过紫... 详细信息

为了探究添加钙基膨润土(CB)对猪粪好氧堆肥过程中水溶性有机物(DOC)动态变化的影响,向猪粪和木屑混合物料中添加不同质量比的CB,采用自制的强制通风好氧发酵装置,进行了为期60天的好氧堆肥试验。定期采集堆肥样品并进行冷冻干燥,通过紫外-可见光谱(UV-Vis),傅里叶变换红外光谱(FTIR)和荧光光谱(FS)相结合的方法,对堆肥样品中DOC光谱特征的变化进行研究。结果表明,在堆肥过程中DOC呈降低趋势,且随着CB添加量的增多,DOC的降解率为49.11%~62.92%;堆肥DOC相应的UV-Vis和FS光谱分析显示,类腐殖质的特征峰强度不断升高,而碳水化合物、类蛋白的特征峰强度逐渐降低;且与对照相比,添加钙基膨润土使类腐殖质特征峰的强度增大,峰位置红移。堆肥结束时,相较于对照,添加CB处理的光谱特征参数SUVA_(254),SUVA_(280)和腐殖化系数分别增加了16.51%~47.72%,8.58%~44.02%和23.16%~88.22%,且5%添加比例最佳,这被FTIR解析峰密度进一步证实;相关性分析显示,SUVA_(254)与堆肥腐熟度呈极显著相关,可指示堆肥腐熟度。综上所述,随着堆肥的进行,有机物由非腐殖质向腐殖质转化,DOC的分子质量及芳构化程度逐渐增加,且添加CB对这一过程具有促进作用,并以5%添加比例最佳。

关键词：堆肥钙基膨润土水溶性有机物光谱分析腐殖化程度

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钙基膨润土辅助对堆肥及土壤Cu、Zn形态转化和白菜吸收的影响

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环境科学 2018年第4期39卷 1926-1933页

作者：赵军超王权任秀娜李荣华 mukesh kumar awasthi Altaf Hussain Lahori 张增强西北农林科技大学资源环境学院杨凌712100

通过好氧堆肥和盆栽试验,探究不同比例(0%、2.5%、5%、7.5%和10%)钙基膨润土(CB)辅助猪粪堆肥过程及盆栽土壤中Cu、Zn形态的变化,并分析CB对白菜生物量及吸收Cu、Zn的影响.结果表明,在所有处理的堆肥过程中,可交换态Cu、Zn的分布比例逐... 详细信息

通过好氧堆肥和盆栽试验,探究不同比例(0%、2.5%、5%、7.5%和10%)钙基膨润土(CB)辅助猪粪堆肥过程及盆栽土壤中Cu、Zn形态的变化,并分析CB对白菜生物量及吸收Cu、Zn的影响.结果表明,在所有处理的堆肥过程中,可交换态Cu、Zn的分布比例逐渐下降,而可氧化态和残渣态逐渐升高,与0%CB相比,2.5%~10%CB可使堆肥结束时生物可利用态(可交换态和可还原态)Cu、Zn的分布比例分别降低19.84%~48.90%和4.94%~16.39%,并以10%CB的效果最为显著.进而开展的盆栽试验显示,施用堆肥后,土壤有机质和EC显著升高,而pH有所下降;CB辅助堆肥能够促使土壤EC的降低及pH的升高,稳定土壤有机质.与纯土处理相比,施用堆肥可显著提升白菜的生物量,且10%CB处理中的生物量最大(6.51 g·盆^(-1)±0.34 g·盆^(-1)).施用CB辅助堆肥后,种后土壤中生物可利用态Cu含量增加;但各处理中可交换态Zn含量分别降低38.91%、43.69%、46.02%、45.12%和54.65%.白菜在施用堆肥后Cu、Zn的吸收量显著降低,并且随着CB辅助比例的增加Zn的吸收量随之减少,而Cu的吸收量呈增加趋势.本研究表明,钙基膨润土能够降低堆肥过程中Cu、Zn活性,在堆肥施入土壤后仍对Zn有持续的固定作用,同时CB辅助堆肥可以提高白菜的生物量,减少重金属Zn在白菜中的累积,并以10%CB的效果最为显著.

关键词：钙基膨润土堆肥土壤铜锌形态

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Effect of random movement and cooperative hunting in the prey-predator system:A dynamical approach

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International Journal of Biomathematics 2024年第3期17卷 211-240页

作者： Shivam Teekam Singh mukesh kumar Department of Mathematics Graphic Era Deemed to be University 566/6 Bell RoadSociety AreaClenent Town DehradunUttarakhand 248002India Department of Computer Science and Engineering Graphic Era Deemed to be University 566/6 Bell RoadSociety AreaClement Town DehradunUttarakhand 248002India

Self-diffusion prerequisite is obtained as the spreading approach of biological *** hunting is a common behavior in predator populations that promotes predation and the coexistence of the prey-predator *** the other side,the Allee effect among prey may cause the system to become *** this paper,a difusive prey predator system with cooperative hunting and the weak Allee effect in prey populations is *** linear stability and Hopf-bifurcation analysis had been used to examine the system's *** the spatial stability of the system,the conditions for Turing instability have been *** multiple-scale analysis has been used to derive the amplitude equations of the *** stability analysis of these amplitude equations leads to the formation of Turing ***,numerical simulations are used to analyze spatial patterns forming in 1-D and *** studies indicate that the model can generate a complex pattern structure and that self-diffusion has a drastic impacton species distribution.

关键词： Prey predator system hunting cooperation Allee effect Hopf-bifurcation diffusive instability amplitudeequation

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On Lie symmetries and invariant solutions of Broer-Kaup-Kupershmidt equation in shallow water of uniform depth

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Journal of Ocean Engineering and Science 2024年第3期9卷 199-206页

作者： Dig Vijay Tanwar mukesh kumar Department of Mathematics Graphic Era Deemed to be UniversityDehradun 248002India Department of Mathematics Motilal Nehru National Institute of Technology AllahabadPrayagraj 211004India

The dynamics of atmosphere and ocean can be examined under different circumstances of shallow water waves like shallow water gravity waves,Kelvin waves,Rossby waves and inertio-gravity *** influences of these waves describe the climate change adaptation on marine environment and ***,the present work aims to derive symmetry reductions of Broer-Kaup-Kupershmidt equation in shallow water of uniform depth and then a variety of exact solutions are *** represents the propagation of nonlinear and dispersive long gravity waves in two horizontal directions in shallow *** invariance of test equations under one parameter transformation leads to reduction of independent ***,twice implementations of symmetry method result into equivalent system of ordinary differential ***,the exact solutions of these ODEs are computed under parametric *** derive results entail several arbitrary constants and functions,which make the findings more *** on the appropriate choice of existing parameters,these solutions are supplemented numerically and show parabolic nature,intensive and non-intensive behavior of solitons.

关键词： BKK equation Lie symmetry method Invariance property Invariant solutions Solitons

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Trigonometric tension B-spline collocation approximations for time fractional Burgers’equation

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Journal of Ocean Engineering and Science 2024年第5期9卷 508-516页

作者： Brajesh kumar Singh mukesh Gupta School of Physical and Decision Sciences Department of MathematicsBabasaheb Bhimrao Ambedkar University Lucknow 226025(UP)INDIA

This manuscript’s aim is to form and examine the numerical simulation of Caputo-time fractional nonlinear Burgers’equation via collocation approach with trigonometric tension B-splines as base ***,L 1 discretization formula is utilized for the time fractional derivative and after linearizing the nonlinear term,the trigonometric tension B-spline interpolants are utilized to get a system of simultaneous linear equations that are solved via Gauss elimination ***,numerical approximation at the desired time level is *** is demonstrated via von-Neumann approach that proposed scheme produces stable *** results of six different test examples having their analytical solutions are compared with the results in the literature to validate the accuracy and efficiency of the scheme.

关键词： Fractional Burgers’equation Trigonometric tension B-spline Collocation scheme Gauss elimination method

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碱性固体对污泥的调质堆肥影响及产品对土壤的改良潜力

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环境科学 2016年第12期37卷 4848-4856页

作者：蔡函臻宁西翠王权张增强任秀娜李荣华王美净 mukesh kumar awasthi 西北农林科技大学资源环境学院杨凌712100 杨凌示范区环境监测站杨凌712100 农业部西北植物营养与农业环境重点实验室杨凌712100

为了科学评判不同碱性固体物质对调质污泥高温堆肥的影响及其有机肥对贫瘠土壤的改良潜力,通过用质量分数为10%的秸秆(干)炭、硬木炭、粉煤灰和石灰等碱性固体物质对污泥和锯末混合物料进行了调质,运用好氧堆肥的方式研究了不同碱性固... 详细信息

为了科学评判不同碱性固体物质对调质污泥高温堆肥的影响及其有机肥对贫瘠土壤的改良潜力,通过用质量分数为10%的秸秆(干)炭、硬木炭、粉煤灰和石灰等碱性固体物质对污泥和锯末混合物料进行了调质,运用好氧堆肥的方式研究了不同碱性固体物质对调质污泥高温堆肥的影响,并用小青菜盆栽试验法探讨了有机肥对贫瘠土壤的改良潜力.结果表明,污泥经外源碱性固体调质后,可以延长高温期的时间,促进堆肥物料的热灭活无害化;秸秆炭和硬木炭调质能显著促进有机质矿化,达21.65%和18.16%;堆肥过程中各处理堆肥pH先降低后升高最终逐渐稳定在6.78~7.33之间,但粉煤灰和石灰调质会使得堆肥初期pH较高;碱性固体调质有利于降低堆肥产品的水溶性盐分含量,至堆肥结束各处理EC均低于3 000μS·cm-1;污泥经过调质后,堆肥的总氮含量逐渐增加,但粉煤灰和石灰调质会导致堆肥初期存在一定的氮素损失,而秸秆炭和硬木炭调质可以减少堆肥初期氮素损失;各调质处理中NH+4-N含量先增加后降低,NO_3^--N均呈现出逐渐增加的趋势,秸秆炭和硬木炭调质可以促进污泥NO_3^--N的转化,而石灰和粉煤灰调质则对NO_3^--N的转化和种子发芽产生一定的抑制作用,但均不会影响堆肥的腐熟;贫瘠土壤经过调质堆肥改良后,土壤有机质和NPK含量显著增加,小青菜生物量增加显著;与未调质堆肥相比,虽然调质后的堆肥对小青菜Cu、Zn的吸收具有一定的抑制作用,但相比于原贫瘠土壤而言,本研究获得的各种堆肥仍能促进小青菜对微量元素Cu、Zn的吸收.研究表明,相比于硬木炭、粉煤灰和石灰等碱性固体物质,秸秆炭更适合于污泥堆肥调质,其堆肥产品具有较好的贫瘠土壤改良潜力.

关键词：污泥碱性固体调质好氧堆肥土壤改良

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