Journal Sciences News
The Journal of Socio-Economics
August 2018
Dynamics of soil organic carbon mineralization and C fractions in paddy soil on application of rice husk biochar
Publication date: August 2018
Source:Biomass and Bioenergy, Volume 115 Author(s): Sushmita Munda, Debarati Bhaduri, Sangita Mohanty, Dibyendu Chatterjee, Rahul Tripathi, M. Shahid, Upendra Kumar, P. Bhattacharyya, Anjani Kumar, Totan Adak, Hemant K. Jangde, A.K. Nayak Biochar plays a pivotal role in carbon storage-fractionation-mineralization process in soil. However, uncertainty still remains about the influence of biochar on these inter-related processes that links to C cycling in soil. A three years field experiment was initiated in 2013
August 2018
Dynamic quantitative trait loci (QTL) for plant height predict biomass yield in hybrid rye (Secale cereale L.)
Publication date: August 2018
Source:Biomass and Bioenergy, Volume 115 Author(s): Thomas Miedaner, Stefan Haffke, D
August 2018
Planning the next-generation biofuel crops based on soil-water constraints
Publication date: August 2018
Source:Biomass and Bioenergy, Volume 115 Author(s): Ruopu Li, Junyao Chen Widely blended in the transportation fuels, biofuels have been generally regarded as indispensable components in the U.S. national energy portfolio. Although the current production of cellulosic biofuels has been staggering at pilot scales, it is expected that large-scale cultivation of cellulosic biofuel crops may occur when techniques for cost-effective bioconversion of lignocellulosic biomass to ethanol are available. However, it is still unclear if enough land is in existence to accommodate potential large-scale lignocellulosic crops development without negative effects on the environment and food market. The appropriate land use for the next-generation biofuel crops should be planned and allocated in a manner that the competitive use of land dedicated to food and energy production and other side effects could be minimized. This research proposes an approach of identifying the potential available land for planting switchgrass in the U.S. Midwest using a GIS-based multi-criteria analysis that combines soil and water constraint factors. The results showed that land areas of approximately 13.6 million ha are unsuitable for profitable food crops but available for switchgrass cultivation in 7 U.S. Great Plains states. The findings can assist decision-makers in formulating land use policies and related environmental management strategies.
August 2018
Dealing with small sets of laboratory test replicates for Improved Cooking Stoves (ICSs): Insights for a robust statistical analysis of results
Publication date: August 2018
Source:Biomass and Bioenergy, Volume 115 Author(s): Francesco Lombardi, Fabio Riva, Emanuela Colombo Improved Cooking Stoves (ICSs) represent the most commonly promoted solution to alleviate the burden associated with the use of traditional biomass in a short-term perspective. However, criticism is raising about the methodologies used for assessing their performance, with a particular focus on laboratory-based testing protocols. One of the key weaknesses of current protocols consists in the inaccurate and biased approach adopted for reporting and statistically analysing test results, which can lead to misleading conclusions about the actual improvements ensured by ICSs. This study proposes a robust procedure to deal with the statistical analysis of small sample sizes, and subsequently verify it through its application to an experimental comparison based on the Water Boiling Test between three models of stove. The results show that the current practice based on 3 or 5 replicates often produces biases in the analyses, as at least 13 replicates might be needed to achieve reliable results. Moreover, the study shows how the t-test is in most cases improperly applied, while the proposed procedure allows to deal both with normally and of non-normally distributed data sets in a robust way. In one case, the apparent improvement of an ICS model as compared to the three-stone fire, is refuted by the application of our procedure.
June 2018
Experimental parametric study on product gas and tar composition in dual fluid bed gasification of woody biomass
Publication date: August 2018
Source:Biomass and Bioenergy, Volume 115 Author(s): Matthias Kuba, Hermann Hofbauer Tar measurements at two industrial-scale DFB gasification plants showed clear trends regarding the influence of the above mentioned parameters on the product gas and tar composition. Since data was gathered during tar measurement campaigns over the course of four years the density of information in industrial-scale was increased significantly. As different operation points, e.g. different capacities of the power plant, are included in the consideration, the verisimilitude is comparably high. It was shown, that reducing the operation temperature leads to an increase of the total tar amounts. However, while the concentration of the tar compounds benzofuran, styrene, and 1H-indene was increased when lowering the temperature, the concentration of naphthalene was decreased. These results were in good correlation with previous work from lab-scale investigations. The temperature did not have a measureable influence on the concentration of the tar compounds anthracene and ace-naphthalene, which was against former experience from lab-scale. The concentration of those larger PAHs anthracene and ace-naphthalene was more dominantly influenced by the bed height in the gasification reactor. Increasing the bed height led to a decrease of the concentration of larger PAHs while it did not have a distinctive influence on benzofuran, styrene, and 1H-indene. The reactor design was identified as an influencing effect, due to the presence of a moving bed section above the inclined wall, where no fluidization is ensured. Thus, additional fluidization nozzles were installed to reduce the effect of the inclined wall. Finally, two operation points for optimized long-term operation were derived from the results.
June 2018
Editorial Board
Publication date: June 2018
Source:Biomass and Bioenergy, Volume 113

June 2018
Energycane growth dynamics and potential early harvest penalties along the Texas Gulf Coast
Publication date: June 2018
Source:Biomass and Bioenergy, Volume 113 Author(s): Yubin Yang, Lloyd T. Wilson, John Jifon, Juan A. Landivar, Jorge da Silva, Murilo M. Maeda, Jing Wang, Eric Christensen The seasonal dynamics of energycane biomass accumulation has major implications in designing optimized cellulosic biomass production and logistics systems. The objectives of this study are to: 1) quantify the growth and biomass dynamics of selected energycane genotypes along the Texas Gulf Coast and 2) estimate the yield penalty and nitrogen removal of different just-in-time harvesting schemes. Field experiments were conducted in three sites along the Texas Gulf Coast with four energycane genotypes. Biomass accumulation varied greatly among genotypes, but relative biomass growth, expressed as a proportion of each genotype's end of season biomass, was similar across years and genotypes for a particular site. On a calendar time basis, relative biomass growth curve became steeper at higher latitudes, indicating a shorter growing season, a narrower harvesting window, and a greater biomass yield penalty for early season harvest. Estimated biomass yield penalties for early August harvest were 60, 44, and 32% of the biomass at crop maturity for the northernmost, intermediate and southernmost site, respectively. Early harvesting of the same amount of biomass tends to remove more nitrogen due to higher organ nitrogen concentration. Combination of organ types harvested also greatly impacts nitrogen removal. Retaining leaf blade materials in the field would remove less nitrogen as compared to harvesting all organs, but will require greater harvesting area. Results from this study highlight the need for a systematic approach to integrate critical time- and site-dependent biomass growth characteristics of energycane in optimizing biomass production and supply logistics.
June 2018
Greenhouse gas emission responses to sugarcane straw removal
Publication date: June 2018
Source:Biomass and Bioenergy, Volume 113 Author(s): Ana Luisa S. Vasconcelos, Mauricio R. Cherubin, Brigitte J. Feigl, Carlos E.P. Cerri, Maria R. Gmach, Marcos Siqueira-Neto Sugarcane straw has been identified as an important feedstock to increase bioenergy production. However, changes in greenhouse gas (GHG) emissions due to straw removal are not yet understood. We hypothesized that partial straw removal changes decomposition rates and could change GHG fluxes. We performed a field experiment within the largest sugarcane-producing region of Brazil (S
June 2018
Economic assessment of landowners' willingness to supply energy crops on marginal lands in the northeastern of the United States
Publication date: June 2018
Source:Biomass and Bioenergy, Volume 113 Author(s): Wei Jiang, Katherine Y. Zipp, Michael Jacobson A major critique of large scale biomass production is the land competition between food and energy crops. A commonly suggested solution is to limit energy crop production to marginal lands. Physical marginality is often used when discussing marginal lands. However, as important is the socioeconomic marginality. This research fills this gap by evaluating willingness to supply bioenergy crops for landowners who have marginal lands. We conducted contingent valuation surveys at study sites with three model crops: switchgrass, miscanthus and willow. Random utility theory is applied to evaluate factors influencing decision maker's choice to plant energy crops. The results indicate that landowners who own marginal lands are more likely to plant energy crops and they require a lower willingness to accept price compared with landowners who do not have marginal lands. At the same time, we noticed that landowners are unfamiliar with these new crops. Economic concerns are the top reasons preventing them from planting energy crops.
June 2018
Growing hybrid poplar in western Canada for use as a biofuel feedstock: A financial analysis of coppice and single-stem management
Publication date: June 2018
Source:Biomass and Bioenergy, Volume 113 Author(s): Ashan Shooshtarian, Jay A. Anderson, Glen W. Armstrong, M.K. (Marty) Luckert Cellulosic biorefineries require a stable supply of low-cost feedstock. In this paper we conduct a financial analysis of hybrid poplar as a purpose grown biofuel feedstock. We analyzed growth rates and costs for producing hybrid poplar in the Peace River region of western Canada an area previously identified as a preferred location for a large biorefinery. We estimated financial returns for two hybrid poplar management systems: (i) a single-stem system that involves the planting and harvesting of individual trees according to optimal economic rotations of 2026 years, and (ii) a coppice (multi-stem) system that involves multiple harvests of new shoots that sprout from stumps following harvest every 34 years. Results suggest that the coppice system is financially inferior (with estimated costs of 202 $ Mg
June 2018
An estimate of carbon stocks for harvested wood products from logs exported from New Zealand to China
Publication date: June 2018
Source:Biomass and Bioenergy, Volume 113 Author(s): Bruce Manley, David Evison In 2015 New Zealand exported 10.5
June 2018
Effects of warm water washing on the fast pyrolysis of Arundo Donax
Publication date: June 2018
Source:Biomass and Bioenergy, Volume 113 Author(s): Devin S. Chandler, Fernando L.P. Resende This work reports how warm water washing of biomass affects fast pyrolysis. Specifically, we applied this concept to Arundo donax, a common herbaceous biomass, and studied the washing effects on fast pyrolysis yields in a Py-GC/MS and a fluidized bed reactor. We stir-washed samples in water at 20
May 2018
Fine grinding of wood Overview from wood breakage to applications
Publication date: June 2018
Source:Biomass and Bioenergy, Volume 113 Author(s): Pasi Karinkanta, Ari
May 2018
Editorial Board
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112

May 2018
Public perceptions towards oil palm cultivation in Tabasco, Mexico
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): Erin C. Pischke, Mark D. Rouleau, Kathleen E. Halvorsen National policies and international market demand have spurred a rapid increase in oil palm cultivation for biodiesel feedstock production, which then causes important social impacts. However, little work has investigated local perceptions of oil palm expansion, particularly in areas expected to become key supply regions, like Latin America. This limits our understanding of the social dimension of oil palm-based biodiesel sustainability. To address this oversight, we present findings from a survey of Tabasco, Mexico, that focuses on community perceptions of local oil palm plantations, their impacts, and expansion potential in a major oil palm cultivation region. We found that oil palm expansion-related perceptions were associated with attitudes toward existing oil palm plantations, whether the palm oil was being cultivated for biodiesel export, and oil palm's ecosystem service provision. Our findings highlight the need for policy makers to consider social acceptability when crafting strategies to expand sustainable bioenergy feedstock production.
May 2018
Trace element leaching from contaminated willow and poplar biomass A laboratory study of potential risks
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): Kate
May 2018
Biotreatment optimization of rice straw hydrolyzates for ethanolic fermentation with Scheffersomyces stipitis
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): Bruno G. Fonseca, Soledad Mateo, Alberto J. Moya, In
May 2018
Dry matter losses and quality changes during short rotation coppice willow storage in chip or rod form
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): Carly Whittaker, Nicola E. Yates, Stephen J. Powers, Tom Misselbrook, Ian Shield This study compares dry matter losses and quality changes during the storage of SRC willow as chips and as rods. A wood chip stack consisting of approximately 74 tonnes of fresh biomass, or 31 tonnes dry matter (DM) was built after harvesting in the spring. Three weeks later, four smaller stacks of rods with an average weight of 0.8 tonnes, or 0.4 tonnes DM were built. During the course of the experiment temperature recorders placed in the stacks found that the wood chip pile reached 60
May 2018
Unravelling the chemical reactions of fatty acids and triacylglycerides under hydrodeoxygenation conditions based on a comprehensive thermodynamic analysis
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): Diego Valencia, Isidoro Garc
May 2018
Detailed kinetic modeling of thermal decomposition of guaiacol A model compound for biomass lignin
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): Thoa T.P. Nguyen, Tam V.-T. Mai, Lam K. Huynh In this work, a detailed kinetic modeling and simulation of thermal decomposition of guaiacol as a lignin model compound was carried out using accurate computational tools. Particularly, main reaction pathways of the guaiacol decomposition were explored by using an accurate composite electronic structure method, namely CBS-QB3. Thermodynamic properties of all species involved and rate constants for all unimolecular decomposition reactions were derived using canonical statistical mechanics. The calculated numbers are in good agreement with scattering data available in the literature; thus they can be confidently used in a wide range of conditions. The effects of temperature and pressure on the thermal conversion were investigated within the framework of Quantum Rice-Ramsperger-Kassel (QRRK) theory with modified strong collision (MSC) model. The resulted kinetic sub-mechanism, consisting of thermodynamic and kinetic data derived from the considered reaction pathways, was coupled to an extended kinetic mechanism to obtain time-resolved species profiles for the pyrolysis at several practical conditions in an attempt to shed more light on the nature of the complicated process. The reaction pathway analysis showed that guaiacol primarily decomposes to hydroxy-cyclopentadienyl radical (C5H4OH) and carbon monoxide (CO) via the initial homolytic cleavage of the O-CH3 bond to produce methyl and hydroxyphenoxy radicals. Such an insight into the mechanism helps to understand its chemistry better and thus effectively construct a complete detailed kinetic model for the thermal decomposition of biomass lignin.

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May 2018
Effects of operating parameters on maize COB briquette quality
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): David K. Okot, Paul E. Bilsborrow, Anh N. Phan Briquetting is considered as one of the pre-treatment methods available for producing uniform sized and moisture content feedstock which is easy to handle, transport and store. The quality of briquettes in terms of density and durability depends on the physical and chemical properties of the feedstock and briquetting conditions. In this study, the effect of compacting pressure, temperature, moisture content, and particle size on the properties of briquettes for thermochemical applications were investigated. It was found that density, impact resistance, and compressive strength significantly increased with increasing compacting temperature (2080
May 2018
Evaluation and classification of eucalypt charcoal quality by near infrared spectroscopy
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): L
May 2018
Mixed culture of recombinant Trichoderma reesei and Aspergillus niger for cellulase production to increase the cellulose degrading capability
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): Chen Zhao, Lu Deng, Hao Fang It is well known that Trichoderma reesei's cellulase is deficient in
May 2018
Development and validation of a fast method based on infrared spectroscopy for biochar quality assessment
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): Marcin Sajdak, Michalina Kotyczka-Mora
May 2018
Energy analysis of poplar production for bioenergy in Sweden
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): Maria Nordborg, G
May 2018
Influence of chipping system on chipper performance and wood chip particle size obtained from peach prunings
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): Luigi Pari, Alessandro Suardi, Angelo Del Giudice, Antonio Scarfone, Enrico Santangelo Many obstacles hamper the full exploitation of pruning residues for energy. Among these, harvesting is a crucial point in the development of a sustainable supply, because it greatly affects the quality of the fuel and profitability of production. In normal forestry operations, drum or disk chippers are the tools most frequently used for comminution. A new chipper has been designed which can collect different pruning residues produced under different field conditions and reduce them to a standard chip size (P45) suitable for boilers. Comminution is carried out by a double-auger on which different types of blades can be mounted. This paper compares outcomes in terms of machine performance and particle size distribution as a consequence of the use of a helical (HELK) or hoe-shaped (HSK) blade. The study was conducted on a peach plantation in Spain grown with the open centre or "vase" training method. Analysis of the main elements illustrated the difference between the types of blades. The HELK blade performed better in terms of coverage of area (0.52
May 2018
Fermentable sugars production from peach tree prunings: Response surface model optimization of NaOH alkaline pretreatment
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): Cinzia Buratti, Daniele Foschini, Marco Barbanera, Francesco Fantozzi Among lignocellulosic residues, peach tree prunings are widely abundant in Italy, due to an extensive production and a high yield of prunings per cultivated hectare; thus, it represents an interesting feedstock for no food derived ethanol. In the whole production process, the pretreatment is the most critical step from technical and economic point of view. In this work peach tree residues were submitted to alkaline pretreatment, in order to maximize the fermentable sugar recovery and thus to maximize the theoretical etOH yield evaluating the best operative conditions in terms of NaOH concentration, temperature, and reaction time. The analysis is carried out by means of Response Surface Methodology approach, in order to optimize the pretreatment step. The optimal predicted conditions to perform the process were NaOH concentration
May 2018
Catalytic cracking of wax esters extracted from Euglena gracilis for hydrocarbon fuel production
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): Iori Shimada, Yoshitaka Nakamura, Shin Kato, Ryohei Mori, Haruhisa Ohta, Kengo Suzuki, Toru Takatsuka Wax esters (WEs) synthesized by Euglena gracilis are potential sources for alternative fuels because of their high productivity, recent success in mass cultivation, and low energy consumption in extraction. In this study, deoxygenation of Euglena WE and conversion to hydrocarbons in a catalytic cracking process under a hydrogen-free atmosphere was investigated using a residue fluid catalytic cracking equilibrium catalyst with enhanced hydrogen-transfer activity. The deoxygenation of Euglena WE proceeded more rapidly with higher H2O selectivity than that of saturated triglycerides. This is because initial
Available online 3 April 2018
Fluidized bed co-combustion of rice husk pellets and moisturized rice husk: The effects of co-combustion methods on gaseous emissions
Publication date: May 2018
Source:Biomass and Bioenergy, Volume 112 Author(s): Pichet Ninduangdee, Vladimir I. Kuprianov This work explores the potential of three co-combustion methods for reducing NOx in a fluidized-bed combustor. Pelletized rice husk (base fuel) was co-fired with moisturized rice husk (secondary fuel) in this reactor using silica sand as the bed material. Four groups of experiments for (1) conventional combustion of rice husk pellets, (2) co-firing pre-mixed fuels, (3) co-firing using fuel staging with bottom air injection, and (4) co-firing using a reburning method combining fuel staging and air staging, were performed at a 200
April 2018
Using an ecosystem services perspective to assess biofuel sustainability
Publication date: Available online 3 April 2018
Source:Biomass and Bioenergy Author(s): A. Gasparatos, C. Romeu-Dalmau, G. von Maltitz, F.X. Johnson, C.B. Jumbe, P. Stromberg, K. Willis
April 2018
Editorial Board
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111

April 2018
Implications of biofuel-induced changes in land use and crop management on sustainability of agriculture in the Texas High Plains
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Yong Chen, Srinivasulu Ale, Nithya Rajan Texas High Plains (THP), which is an important cotton (Gossypium hirsutum L.) growing region in the United States faces challenges from declining/deteriorating groundwater levels/quality, recurring droughts and severe wind erosion. Growing cover crops after harvesting cotton and/or changing land use from cotton to perennial bioenergy crops could not only address above challenges, but also assist in meeting the national biofuel target. The objective of this study is to assess the implications of changes in land use (replacing cotton with Alamo switchgrass (Panicum virgatum L.) and Miscanthus
April 2018
Eucalyptus x urograndis biomass production for energy purposes exposed to a Mediterranean climate under different irrigation and fertilisation regimes
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Manuel Fern
April 2018
Effect of intercropping hybrid poplar and switchgrass on biomass yield, forage quality, and land use efficiency for bioenergy production
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Emi Kimura, Steven C. Fransen, Harold P. Collins, Brian J. Stanton, Austin Himes, Jeffrey Smith, Stephen O. Guy, William J. Johnston Land use efficiency can be maximized if an intercropping system is utilized to produce switchgrass (Panicum virgatum L.) biomass within the alleys between hybrid poplar trees (Populus spp.). Information is limited on switchgrass production and intercropping system in the Pacific Northwest of U.S. The objectives of this study were to evaluate the effects of hybrid poplar trees on switchgrass yield and forage quality and to determine the land use efficiency in an intercropping system under irrigation. Three cultivars of switchgrass (Kanlow, Blackwell, and Trailblazer) were planted in the alleys between hybrid poplar trees (Clones: OP367 and PC4) at the Greenwood Resources, Boardman, OR in 2011. Switchgrass growth was negatively influenced by hybrid poplar trees with mean leaf area index, tiller density, and switchgrass dry matter (DM) yield in the monoculture and intercropped plots equal to 4.9 and 1.7, 383 and 69 tillers m
April 2018
Identification of oil, sugar and crude fiber during tobacco (Nicotiana tabacum L.) seed development based on near infrared spectroscopy
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Zhan Li, Cheng Li, Yue Gao, Wenguang Ma, Yunye Zheng, Yongzhi Niu, Yajing Guan, Jin Hu Tobacco seeds are a potential feedstock for biofuels. To insure make full use of tobacco seed biomass, the present study was carried out to estimate seed oil, sugar and crude fiber during seed development through near infrared spectroscopy (NIRS) nondestructive determination. Four pre-processing methods, Savitzky-Goly after standard normal variate (SNV-SG), first Savitzky-Goly derivative after standard normal variate (SNV-SG-1stD), Savitzky-Goly after multiplicative scatter correction (MSC-SG) and first Savitzky-Goly derivative after multiplicative scatter correction (MSC-SG-1stD), were respectively performed to optimize the original spectra before establishment of the calibration models. Then linear partial least squares (PLS) and nonlinear least-squares support vector machine (LS-SVM) methods were utilized to develop the calibration models, in which the LS-SVM models were found to have better performance than PLS models. The best LS-SVM models of oil, sugar and crude fiber were established after pre-processed by MSC-SG-1st D. These results indicated that NIRS was suitable to rapidly and accurately analyze tobacco seed composition.
April 2018
Productivity and biomass characteristics of selected poplar (Populus spp.) cultivars under the climatic conditions of northern Poland
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Marzena Niemczyk, Adam Kaliszewski, Marcin Jewiarz, Marek Wr
April 2018
A biorefinery approach for fractionation of Miscanthus lignocellulose using subcritical water extraction and a modified organosolv process
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Arielle Muniz Kubota, Raitis Kalnins, Tim W. Overton Using a biorefinery approach, biomass polymers such as lignin and carbohydrates can be selectively purified from lignocellulosic feedstocks with the aim of generating not only lignocellulosic bioethanol but also high value bio-based compounds. Furthermore, the efficient use of the entire biomass can increase overall feedstock value and significantly contribute to process cost-effectiveness. Therefore, the aim of this work was to fractionate the main compounds of the energy crop Miscanthus x giganteus (MxG) using green solvents in order to obtain cellulose-enriched fibres as well as non-toxic streams rich in hemicellulose and lignin. Two processing routes were compared: a direct 1-step modified organosolv method for simultaneous lignin and hemicellulose removal; and a 3-step sequential process using subcritical water extraction for recovery of first extractives then hemicellulose, followed by modified organosolv lignin extraction. Both methods successfully generated cellulose-enriched fibres; from a complex mixture of compounds present in MxG, it was possible to obtain fibres comprising 78% cellulose without the use of commonly-applied toxic solvents that can potentially limit end uses for processed biomass and/or need additional neutralization steps. Fibres generated by the direct and sequential processes were very similar in composition; however, physicochemical analysis of the fibres using scanning electron microscopy, Fourier-transform infrared spectroscopy and principal component analysis confirmed structural differences resulting from the two processing routes, which were demonstrated to have an impact on downstream processing.
April 2018
Analyzing the potential of domestic biomass resources for the energy transition in Switzerland
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Vanessa Burg, Gillianne Bowman, Matthias Erni, Renato Lemm, Oliver Thees Biomass resource assessment constitutes the foundation for integrated bioenergy planning in order to evaluate the sustainable feasibility and to estimate the additional bioenergy potential. Its spatial distribution is an essential criterion to facilitate the exploitation of the untapped bioenergy potential by guiding industry and decision-making processes. This paper provides regionalized and aggregated estimates of the potentially available resources for bioenergy in Switzerland (10 woody and non-woody biomass types). First, considering the different biomass characteristics and available data, appropriate methods at the finest scale possible were elaborated to estimate the annual domestic biomass amount which could theoretically be collected. Then, explicit and rationale restrictions for sustainable bio-energy production were defined according to the current state of the art. Finally, the additional potential was estimated considering the current bioenergy production. The procedures developed can be transferred to other countries and spatial scales according to the local situation and available data. The Swiss biomass theoretical primary energy potential was estimated at 209
April 2018
Optimization of biomass and hydrogen production by Anabaena sp. (UTEX 1448) in nitrogen-deprived cultures
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Sarah Regina Vargas, Paulo Vagner dos Santos, Marcelo Zaiat, Maria do Carmo Calijuri Hydrogen is a non-polluting source of energy, which is renewable and very abundant in the universe. Microalgae and cyanobacteria produce hydrogen by breaking down water and organic compounds. The aim of this research was to develop hydrogen production using cyanobacterium Anabaena sp. by nitrogen deprivation in two experimental phases of cultivation, optimizing its biomass from physicochemical variables. The experiment was carried out with axenic culture, in BG-11 medium, in triplicate, in two steps and under continuous illumination: in the first step, cultures were maintained in an aerobic condition until the first half of growth phase under nitrogen limitation; in the second step, the biomass was transferred, by centrifugation and cell wash, to anaerobic photobioreactors under nitrogen deprivation and the atmosphere was changed by argon for hydrogen production. Hydrogen was detected by gas chromatography and the hydrogen production parameters were tested using the Gompertz model and the volume by the general ideal gas equation. The optimization of biomass in the first step of cultivation increased its yield by 18.3% and heterocysts formation was 3.4 times higher in nitrogen privation conditions. Therefore, hydrogen production by cell increased 55.2% and the productivity 57.6% when compared to the culture of Anabaena sp. in control condition. The method and the strain were effective for hydrogen production and the pH, temperature and light intensity affected the improvement of this production and increased the biomass yield.

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April 2018
Potential of bio-energy production in Ethiopia based on available biomass residues
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Elias W. Gabisa, Shabbir H. Gheewala Biomass is one of the most important and emerging sources of energy. The objective of this study was, therefore, to explore the potential of energy production from biomass resources available in Ethiopia. The study involved the estimation of bio-energy potential from crop residues, forest, livestock waste, and municipal solid waste (MSW) in the major towns of the country. The paper also presents policy recommendations for sustainable bio-energy development. The crop, forest, and livestock population data were extracted from the Food and Agriculture Organization statistics database (FAOSTAT) and the country's national and regional reports. The results revealed that Ethiopia has a substantial amount of biomass residues, which are not currently being utilized and collected, that can be used without negatively affecting the socio-economic as well as environmental requirements and without compromising food security. The total bio-energy availability of the country was estimated to be 750
April 2018
Enhanced hydrogen production by optimization of immobilized cells of the green alga Tetraspora sp. CU2551 grown under anaerobic condition
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Thanaporn Maswanna, Saranya Phunpruch, Peter Lindblad, Cherdsak Maneeruttanarungroj The green alga Tetraspora sp. CU2551 has previously been identified and characterized as a photosynthetic microorganism with high potential for H2 production. In the present study, cells of Tetraspora CU2551 were entrapped and immobilized in an alginate matrix with the aim to analyze the effect of cell stacking and a reduced exposure of O2 to the cells. The results showed that the most favorable immobilization conditions were 4% (w/v) of final alginate concentration and a cell concentration of 0.125
April 2018
Evaluation of blue mussels (Mytilus edulis) as substrate for biogas production in Kalmar County (Sweden)
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Birte Wollak, J
April 2018
Comparative study: Furfural production from two types of pre-hydrolysates produced using aspen and maple chips
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Adil Mazar, Naceur Jemaa, Waleed Wafa Al Dajani, Mariya Marinova, Michel Perrier During the production of kraft dissolving pulp a pre-hydrolysate stream is generated prior to pulping. This pre-hydrolysate is a potential feedstock for the production of high value-added bioproducts. It contains a considerable amount of dissolved organics such as hemicelluloses, lignin and acetic acid. The purpose of this study was to investigate the effect of sulfur dioxide (SO2) used during the pre-hydrolysis step on furfural production. The production of furfural from two types of simulated kraft dissolving pulp mill pre-hydrolysates was investigated. The first pre-hydrolysate was generated using hot water (PHLW) while the second one (PHLS) was generated using an aqueous solution containing sulfur dioxide (SO2). The effect of temperature and sulfuric acid concentration on furfural yield from both pre-hydrolysates was investigated. A maximum furfural yield of 83.3% was obtained at 240
April 2018
Cellulose recovery from Quercus sp. sawdust using Ethanosolv pretreatment
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Karla Ruiz Cuilty, Lourdes Ballinas-Casarrubias, Eduardo Rodr
April 2018
Factors influencing ethanol mill location in a new sugarcane producing region in Brazil
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Gabriel Granco, Ana Claudia Sant'Anna, Jason S. Bergtold, Marcellus M. Caldas The rise in global demand for ethanol has caused an expansion of ethanol mills into new areas to increase supply. Ethanol mills are supply-oriented firms; thus, they seek locations near agricultural feedstocks to ensure access and to reduce transaction costs. In Brazil, the rise of ethanol production has been more significant in the states of Goi
April 2018
Synthesis of bio-based polyurethane foams with liquefied wheat straw: Process optimization
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Hongwei Li, Chunbao (Charles) Xu, Zhongshun Yuan, Qin Wei Bio-based polyurethane (BPU) foams were successfully prepared using hydrothermally liquefied wheat straw (WS) to substitute a mass fraction of up to 50% of polyols. Response surface methodology (RSM) based on central composite design (CCD) was employed to optimize four process parameters: NCO/OH molar ratio, loading of crosslinking agent (glycerol), loading of catalyst (a mixture of triethylene diamine, stannous octoate, and triethanolamine), and loading of blowing agent (water) for the maximum compression strength of the rigid BPU foams. With the quadratic orthogonal regression model, verified by experimentation, the maximum compression strength of approximately 180
April 2018
Improved power provision from biomass: A retrospective on the impacts of German energy policy
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Mattes Scheftelowitz, Raik Becker, Daniela Thr
April 2018
Preface
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Wolter Prins, Ralph Overend
April 2018
Contribution of global GHG reduction pledges to bioenergy expansion
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): Seungwoo Kang, Sandrine Selosse, Nadia Ma

Future European biogas: Animal manure, straw and grass potentials for a sustainable European biogas production
Publication date: April 2018
Source:Biomass and Bioenergy, Volume 111 Author(s): A.K.P. Meyer, E.A. Ehimen, J.B. Holm-Nielsen Biogas is expected to play an important role in reaching the future energy policy targets of the European Union (EU). The sustainability of biogas substrates has however been recently critically discussed due to the increasing shares of agricultural land used for energy crop production. The aim of this study was to project and map the biomass and biogas energy potential from a selection of potentially sustainable agricultural residues, which have been documented to improve in biogas yields when co-digested in biogas production, for the EU28 in year 2030. The investigated types of residual biomasses were animal manure, straw by-products from cereal production, and excess grass from rotational and permanent grasslands and meadows. The biogas energy potential from the investigated biomass was projected to range from 1.2103 to 2.3103PJy
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