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https://www.readbyqxmd.com/read/28076440/application-of-a-cloud-model-set-pair-analysis-in-hazard-assessment-for-biomass-gasification-stations
#1
Fang Yan, Kaili Xu
Because a biomass gasification station includes various hazard factors, hazard assessment is needed and significant. In this article, the cloud model (CM) is employed to improve set pair analysis (SPA), and a novel hazard assessment method for a biomass gasification station is proposed based on the cloud model-set pair analysis (CM-SPA). In this method, cloud weight is proposed to be the weight of index. In contrast to the index weight of other methods, cloud weight is shown by cloud descriptors; hence, the randomness and fuzziness of cloud weight will make it effective to reflect the linguistic variables of experts...
2017: PloS One
https://www.readbyqxmd.com/read/28068592/effect-of-torrefaction-on-the-properties-of-rice-straw-high-temperature-pyrolysis-char-pore-structure-aromaticity-and-gasification-activity
#2
Handing Chen, Xueli Chen, Yueqiang Qin, Juntao Wei, Haifeng Liu
The influence of torrefaction on the physicochemical characteristics of char during raw and water washed rice straw pyrolysis at 800-1200°C is investigated. Pore structure, aromaticity and gasification activity of pyrolysis chars are compared between raw and torrefied samples. For raw straw, BET specific surface area decreases with the increased torrefaction temperature at the same pyrolysis temperature and it approximately increases linearly with weight loss during pyrolysis. The different pore structure evolutions relate to the different volatile matters and pore structures between raw and torrefied straw...
December 24, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/28066511/biomass-waste-to-energy-valorisation-technologies-a-review-case-for-banana-processing-in-uganda
#3
REVIEW
Robert Gumisiriza, Joseph Funa Hawumba, Mackay Okure, Oliver Hensel
BACKGROUND: Uganda's banana industry is heavily impeded by the lack of cheap, reliable and sustainable energy mainly needed for processing of banana fruit into pulp and subsequent drying into chips before milling into banana flour that has several uses in the bakery industry, among others. Uganda has one of the lowest electricity access levels, estimated at only 2-3% in rural areas where most of the banana growing is located. In addition, most banana farmers have limited financial capacity to access modern solar energy technologies that can generate sufficient energy for industrial processing...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28061398/energy-performance-of-an-integrated-bio-and-thermal-hybrid-system-for-lignocellulosic-biomass-waste-treatment
#4
Xiang Kan, Zhiyi Yao, Jingxin Zhang, Yen Wah Tong, Wenming Yang, Yanjun Dai, Chi-Hwa Wang
Lignocellulosic biomass waste, a heterogeneous complex of biodegradables and non-biodegradables, accounts for large proportion of municipal solid waste. Due to limitation of single-stage treatment, a two-stage hybrid AD-gasification system was proposed in this work, in which AD acted as pre-treatment to convert biodegradables into biogas followed by gasification converting solid residue into syngas. Energy performance of single and two-stage systems treating 3 typical lignocellulosic wastes was studied using both experimental and numerical methods...
December 28, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/28042990/physicochemical-evolution-during-rice-straw-and-coal-co-pyrolysis-and-its-effect-on-co-gasification-reactivity
#5
Juntao Wei, Yan Gong, Qinghua Guo, Lu Ding, Fuchen Wang, Guangsuo Yu
Physicochemical evolution (i.e. pore structure variation, carbon structure change and active AAEM transformation) during rice straw (RS) and Shenfu bituminous coal (SF) co-pyrolysis was quantitatively determined in this work. Moreover, the corresponding char gasification was conducted using a thermogravimetric analyzer (TGA) and relative reactivity was proposed to quantify the co-pyrolysis impact on co-gasification reactivity. The results showed that the development of pore structure in co-pyrolyzed chars was first inhibited and then enhanced with the decrease of SF proportion...
March 2017: Bioresource Technology
https://www.readbyqxmd.com/read/27928060/gasification-an-alternative-solution-for-energy-recovery-and-utilization-of-vegetable-market-waste
#6
Sunil L Narnaware, Nsl Srivastava, Samir Vahora
Vegetables waste is generally utilized through a bioconversion process or disposed of at municipal landfills, dumping sites or dumped on open land, emitting a foul odor and causing health hazards. The presents study deals with an alternative way to utilize solid vegetable waste through a thermochemical route such as briquetting and gasification for its energy recovery and subsequent power generation. Briquettes of 50 mm diameter were produced from four different types of vegetable waste. The bulk density of briquettes produced was increased 10 to 15 times higher than the density of the dried vegetable waste in loose form...
December 6, 2016: Waste Management & Research
https://www.readbyqxmd.com/read/27912988/sequential-electrodialytic-recovery-of-phosphorus-from-low-temperature-gasification-ashes-of-chemically-precipitated-sewage-sludge
#7
Raimon Parés Viader, Pernille Erland Jensen, Lisbeth M Ottosen, Jesper Ahrenfeldt, Henrik Hauggaard-Nielsen
Phosphorus recycling from secondary materials like sewage sludge ashes offers an alternative to mining of phosphates from primary resources and a mean to counteract the current phosphorous rock depletion concern. A separation of P from the bulk ash is normally required, due to its low plant availability and the presence of heavy metals. Previously, more than 80% of P was recovered from incineration sewage sludge ashes using a two-compartment electrodialytic cell. In contrast, the recovery was below 30% for ashes from low-temperature gasification using the same setup...
November 29, 2016: Waste Management
https://www.readbyqxmd.com/read/27908585/innovative-pretreatment-strategies-for-biogas-production
#8
REVIEW
Regina J Patinvoh, Osagie A Osadolor, Konstantinos Chandolias, Ilona Sárvári Horváth, Mohammad J Taherzadeh
Biogas or biomethane is traditionally produced via anaerobic digestion, or recently by thermochemical or a combination of thermochemical and biological processes via syngas (CO and H2) fermentation. However, many of the feedstocks have recalcitrant structure and are difficult to digest (e.g., lignocelluloses or keratins), or they have toxic compounds (such as fruit flavors or high ammonia content), or not digestible at all (e.g., plastics). To overcome these challenges, innovative strategies for enhanced and economically favorable biogas production were proposed in this review...
January 2017: Bioresource Technology
https://www.readbyqxmd.com/read/27898796/sorption-of-pharmaceuticals-heavy-metals-and-herbicides-to-biochar-in-the-presence-of-biosolids
#9
Daniel A Bair, Fungai N D Mukome, Inna E Popova, Temitope A Ogunyoku, Allie Jefferson, Daoyuan Wang, Sarah C Hafner, Thomas M Young, Sanjai J Parikh
Agricultural practices are increasingly incorporating recycled waste materials, such as biosolids, to provide plant nutrients and enhance soil functions. Although biosolids provide benefits to soil, municipal wastewater treatment plants receive pharmaceuticals and heavy metals that can accumulate in biosolids, and land application of biosolids can transfer these contaminants to the soil. Environmental exposure of these contaminants may adversely affect wildlife, disrupt microbial communities, detrimentally affect human health through long-term exposure, and cause the proliferation of antibiotic-resistant bacteria...
November 2016: Journal of Environmental Quality
https://www.readbyqxmd.com/read/27883955/prospects-for-energy-recovery-during-hydrothermal-and-biological-processing-of-waste-biomass
#10
Léda Gerber Van Doren, Roy Posmanik, Felipe A Bicalho, Jefferson W Tester, Deborah L Sills
Thermochemical and biological processes represent promising technologies for converting wet biomasses, such as animal manure, organic waste, or algae, to energy. To convert biomass to energy and bio-chemicals in an economical manner, internal energy recovery should be maximized to reduce the use of external heat and power. In this study, two conversion pathways that couple hydrothermal liquefaction with anaerobic digestion or catalytic hydrothermal gasification were compared. Each of these platforms is followed by two alternative processes for gas utilization: 1) combined heat and power; and 2) combustion in a boiler...
February 2017: Bioresource Technology
https://www.readbyqxmd.com/read/27815006/the-effects-of-straw-or-straw-derived-gasification-biochar-applications-on-soil-quality-and-crop-productivity-a-farm-case-study
#11
Veronika Hansen, Dorette Müller-Stöver, Valentina Imparato, Paul Henning Krogh, Lars Stoumann Jensen, Anders Dolmer, Henrik Hauggaard-Nielsen
Thermal gasification of straw is a highly efficient technology that produces bioenergy and gasification biochar that can be used as a soil amendment, thereby returning non-renewable nutrients and stable carbon, and securing soil quality and crop productivity. A Danish on-farm field study investigated the impact of traditional straw incorporation vs. straw removal for thermal gasification bioenergy production and the application of straw gasification biochar (GB) on soil quality and crop production. Two rates of GB were applied over three successive years in which the field was cropped with winter wheat (Triticum aestivum L...
November 1, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27796970/thermochemical-conversion-of-waste-tyres-a-review
#12
Madona Labaki, Mejdi Jeguirim
A review of the energy recovery from waste tyres is presented and focuses on the three thermochemical processes used to valorise waste tyres: pyrolysis, gasification, and combustion/incineration. After recalling the chemical composition of tyres, the thermogravimetric behaviours of tyres or their components under different atmospheres are described. Different kinetic studies on the thermochemical processes are treated. Then, the three processes were investigated, with a particular attention given to the gasification, due to the information unavailability on this process...
October 27, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27773548/a-financial-feasibility-model-of-gasification-and-anaerobic-digestion-waste-to-energy-wte-plants-in-saudi-arabia
#13
Laith A Hadidi, Mohamed Mahmoud Omer
Municipal Solid Waste (MSW) generation in Saudi Arabia is increasingly growing at a fast rate, as it hurtles towards ever increasing urban development coupled with rapid developments and expanding population. Saudi Arabia's energy demands are also rising at a faster rate. Therefore, the importance of an integrated waste management system in Saudi Arabia is increasingly rising and introducing Waste to Energy (WTE) facilities is becoming an absolute necessity. This paper analyzes the current situation of MSW management in Saudi Arabia and proposes a financial model to assess the viability of WTE investments in Saudi Arabia in order to address its waste management challenges and meet its forecasted energy demands...
January 2017: Waste Management
https://www.readbyqxmd.com/read/27771525/role-of-steel-slags-on-biomass-carbon-dioxide-gasification-integrated-with-recovery-of-high-temperature-heat
#14
Yongqi Sun, Qianyi Liu, Hao Wang, Zuotai Zhang, Xidong Wang
Disposal of biomass in the agriculture and steel slags in the steel industry provides a significant solution toward sustainability in China. Herein these two sectors were creatively combined as a novel method, i.e., biomass/CO2 gasification using waste heat from hot slags where the influence of chemical compositions of steel slags, characterized as iron oxide content and basicity, on gasification thermodynamics, was systemically reported for the first time. Both the target gases of CO, H2 and CH4 and the polluted gases of NH3, NO and NO2 were considered...
January 2017: Bioresource Technology
https://www.readbyqxmd.com/read/27771200/assessment-of-by-products-of-bioenergy-systems-anaerobic-digestion-and-gasification-as-potential-crop-nutrient
#15
Sampriti Kataki, Samarendra Hazarika, D C Baruah
Alternative fertilizer resources have drawn attention in recent times in order to cope up with ever increasing demand for fertilizer. By-products of bioenergy system are considered favourable as organic fertilizer due to their ability to recycle plant nutrients. Present study evaluates fertilizer suitability of by-products of two bioenergy systems viz. 3 types of anaerobic digestion by-products (digestate) from local surplus biomass such as cowdung, Ipomoea carnea:cowdung (60:40) and ricestraw:green gram stover:cowdung (30:30:40) and one gasification by-product (biochar) from rice husk...
January 2017: Waste Management
https://www.readbyqxmd.com/read/27742149/environmental-assessment-of-energy-generation-from-agricultural-and-farm-waste-through-anaerobic-digestion
#16
Figen Sisman Nayal, Aydin Mammadov, Nilgun Ciliz
While Turkey is one of the world's largest producers and exporters of agricultural goods, it is also, at the same time a net importer of energy carriers. This dichotomy offers a strong incentive to generate energy from agricultural and farming waste; something which could provide energy security for rural areas. Combined with the enhanced energy security for farming areas, the production of energy in this manner could conceivably contribute to the overall national effort to reduce the Turkey's carbon footprint...
October 11, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27721097/hydrothermal-gasification-of-cladophora-glomerata-macroalgae-over-its-hydrochar-as-a-catalyst-for-hydrogen-rich-gas-production
#17
Farid Safari, Omid Norouzi, Ahmad Tavasoli
A tubular batch micro-reactor system was used for hydrothermal gasification (HTG) of Cladophora glomerata (C. glomerata) as green macroalgae found in the southern coast of the Caspian Sea, Iran. Non-catalytic tests were performed to determine the optimum condition for hydrogen production. Hydrochar, as a solid residue of non-catalytic HTG was characterized by BET, FESEM, and ICP-OES methods to determine its physiochemical properties. Surface area and pore volume of C. glomerata increased drastically after HTG...
December 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27720225/corrigendum-to-state-of-the-art-of-biological-processes-for-coal-gasification-wastewater-treatment-biotechnol-adv-34-5-2016-1064-1072
#18
Qian Zhao, Yu Liu
No abstract text is available yet for this article.
October 5, 2016: Biotechnology Advances
https://www.readbyqxmd.com/read/27695754/comparison-of-the-physical-and-chemical-properties-of-laboratory-and-field-aged-biochars
#19
Santanu Bakshi, Deborah M Aller, David A Laird, Rajesh Chintala
The long-term impact of biochar on soil properties and agronomic outcomes is influenced by changes in the physical and chemical properties of biochars that occur with time (aging) in soil environments. Fresh biochars, however, are often used in studies because aged biochars are generally unavailable. Therefore, a need exists to develop a method for rapid aging of biochars in the laboratory. The objectives of this study were to compare the physicochemical properties of fresh, laboratory-aged (LA), and field-aged (FA) (≥3 yr) biochars and to assess the appropriateness of a laboratory aging procedure that combines acidification, oxidation, and incubations as a mimic to field aging in neutral or acidic soil environments...
September 2016: Journal of Environmental Quality
https://www.readbyqxmd.com/read/27693728/simulation-of-biomass-steam-gasification-in-fluidized-bed-reactors-model-setup-comparisons-and-preliminary-predictions
#20
Linbo Yan, C Jim Lim, Guangxi Yue, Boshu He, John R Grace
A user-defined solver integrating the solid-gas surface reactions and the multi-phase particle-in-cell (MP-PIC) approach is built based on the OpenFOAM software. The solver is tested against experiments. Then, biomass-steam gasification in a dual fluidized bed (DFB) gasifier is preliminarily predicted. It is found that the predictions agree well with the experimental results. The bed material circulation loop in the DFB can form automatically and the bed height is about 1m. The voidage gradually increases along the height of the bed zone in the bubbling fluidized bed (BFB) of the DFB...
December 2016: Bioresource Technology
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