cultivator Articles
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Long-term changes in Mollisol organic Carbon and Nitrogen
Conversions of Mollisols from prairie to cropland and subsequent changes in crop production practices in the Midwestern USA have resulted in changes in soil organic matter. Few studies have used archived samples, long-term resampling of soils to a depth of 1 m, and space for time studies to document these changes. We resampled soils by depth (0–100 cm) in fields at 19 locations in central ...
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Soil erosion impact on soil organic carbon spatial variability on steep tropical slopes
The main objectives of this study were to evaluate soil organic C (SOC) variability in a representative hillslope of Laos and to quantify the impact of some environmental factors. We collected 2348 soil samples from 581 georeferenced soil pits within a hillslope of northern Laos under traditional shifting cultivation at 0- to 0.05-m depth and then every 0.1 m to 0.35-m depth. The SOC stocks at 0- ...
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The use of microalgae and their culture medium for biogas production in an integrated cycle
Vinasse is a residue produced in large quantities as a sub-product of ethanol production. Anaerobic digestion of vinasse can yield large amounts of biogas, but often difficulties arise in maintaining stable operation, due to the acidity of the material (which has a pH between 3.5 and 5) and a strong tendency to further acidification. Anaerobically digested vinasse can be used as part of a ...
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Water-saving analysis on an effective water reuse system in biodiesel feedstock production based on
Chlorella zofingiensis fed-batch cultivationThe micralgae-based biofuel obtained from dairy wastewater (DWW) is considered a promising source of energy. However, this process consumes water due to the concentration of wastewater being normally too high for some micoralgae cultivation, and dilution is always needed. In this work, the cultivation of microalgae has been examined in non-recirculated water (NR) and recirculated water systems ...
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Potential use of carbon dioxide by microalgae in Malaysia
CO2 emission, which is feared to bring more harm than benefit to the environment, can be prevented and reduced through the cultivation of microalgae. Microalga is the fastest growing organism (estimated 40 times faster than terrestrial grass) and requires a high CO2 concentration to reproduce. Thus, this work evaluates the potential of microalgae to utilise CO2. The tolerable concentration of CO2 ...
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Bioethanol Dispersing as World Challenge
Bioethanol dispersing finds broad application in a national economy as solvent, also it is applied in production of a butadiene, as fuel for rocket engines, car engines, antifreeze, etc., it is an important intermediate product of organic synthesis (in production of esters, celluloid, artificial silk, ethyl aldehyde, acetic acid, chloroform, ethyl oxide and other products). Ethanol contains ...
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Propane Powered CHP Improving Energy Efficiency of Greenhouse Operations in Greece - Case Study
Agrotikes Ekmetalleyseis IKE, situated in Almyros, Volos, is a greenhouse operator specialising in the cultivation of vegetables distributed throughout Greece. To enhance the energy efficiency of their greenhouse operations, the company selected Clarke Energy Hellas to supply and install a combined heat and power plant (CHP) with optional CO2 recovery. This system is powered by an INNIO ...
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Africa Sub meter from YTL metering
The African real estate market is booming with new commercial and residential developments, and with it comes the growing demand for effective monitoring and billing of electricity consumption by tenants. Using sub meters, such as those provided by YTL metering, enables landlords and owners to manage their electricity consumption more reliably and accurately. What is a sub meter? It is a kind ...
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Enterprise culture of Qingzhou power cable manufacturer
Enterprise culture of Qingzhou power cable manufacturer In terms of management: Qingzhou cable manufacturer is equipped with advanced equipment, professional technology and systematic management, adhering to the cultural concept of "creating flawless quality and creating first-class brand", and constantly making new breakthroughs in R & D and production. In terms of production ...
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Effect of thermal and alkaline pretreatment of giant miscanthus and Chinese fountaingrass on biogas production
Giant miscanthus (Miscanthus×giganteus) and Chinese fountaingrass (Pennisetum alopecuroides (L.) Spreng), cultivated for landscaping and soil conservation, are potential energy crops. The study investigated the effect of combined thermal and alkaline pretreatments on biogas production of these energy crops. The pretreatment included two types of alkali (6% CaO and 6% NaOH) at 22, 70 and 100 ...
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Algal biofuels are no energy panacea
Algal biofuels, like crops, demand land, water, fertilisers, pesticides and inputs that are costly for India, says Hoysall Chanakya Of late, there is heady euphoria over 'green' algal biofuels that are dangled as a panacea for developing countries such as India. While it is true that algal biofuels can contribute to a fossil fuel-free future, the promises of runaway successes are unrealistic. ...
By SciDev.Net
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Economic evaluation and environmental benefits of biofuel: an Indian perspective
Biomass based fuel technologies are rapidly developing and the barriers in implementing such technologies are being identified to achieve their widespread commercialisation. The two most common biofuels are biodiesel and bioethanol. About 500 million litres of ethanol is required in India itself for 10% blending to gasoline. Indian Planning Commission sees tremendous potential in Jatropha curcus ...
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Energy analysis and potentials of biodiesel production from Jatropha Curcas in Tunisia
Oleaginous plants such as Jatropha Curcas Linnaeus (JCL), not intended for human consumption but used for biodiesel production, could contribute to beneficial outcomes. This plant grows on poor land (arid and marginal land) and is drought resistant. Jatropha Curcas is native to South America and widely grown in South and Central America, Africa, and Asia (Achten et al., 2007; Kumar et al., 2011). ...
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Anaerobic digestion of mixed microalgae cultivated in secondary effluent under mesophilic and thermophilic conditions
The anaerobic digestion of mixed indigenous microalgae, grown in a secondary effluent, was evaluated in batch tests at mesophilic (35°C) and thermophilic (50°C) conditions. Under mesophilic conditions, specific methane production varied from 178 to 207 mL CH4/g volatile solids (VS) and the maximum production rate varied from 8.8 to 26.1 mL CH4/(gVS day), depending on the type of microalgae ...
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Cultivating geothermal energy sources – Case Study
Since the early twentieth century, geothermal energy has been used to produce electricity. In the 1980’s and 90’s, rapid expansion in the demand for geothermal energy put pressure on suppliers to reduce costs and increase efficiencies. Because of high temperatures and varying pressures, measuring steam flow through "Differential Pressure" methods was fraught with inconsistencies. ...
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Solution concepts for the production of biogas
With its products that go to form part of biogas plants, it is not only a significant pioneering role that Hofstetter Umwelttechnik AG in Switzerland deserves. The company in Berne also adopts a leading position on the worldwide market for utilizing biogas. Hofstetter products – the socalled flares and compressor stations – are designed both for fermentation plants for biomass and for plants for ...
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Influence of extracellular polysaccharides (EPS) produced by two different green unicellular algae on membrane filtration in an algae-based biofuel production process
In the present study, two strains of green algae named S1 and S2, categorized as the same species of Pseudo-coccomyxa ellipsoidea but showing 99% homology, were cultivated under the same conditions and filtrated with a microfiltration membrane. On the basis of the results of the extracellular polysaccharides (EPS) characteristics of these two green algae and the degree of fouling, the ...
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DOE Announces Up to $8 Million in Funding for Algae Biofuels Projects
On July 11, 2017, DOE announced the selection of three projects focused on reducing the costs of producing algal biofuels and bioproducts that will receive up to $8 million in funding. The projects aim to generate high-impact tools and techniques for increasing the productivity of algae organisms and cultures and biology-focused breakthroughs. The project winners include: Lumen Bioscience, ...
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Sustainability assessment of microalgal biodiesel production processes: an exergetic analysis approach with Aspen Plus
Biodiesel production growth rate keeps increasing every year with the hope of replacing fossil based liquid fuel which is near exhaustion. Energy efficiency methods coupled with environmental and economic sustainabilities would render biodiesel production attractive. Algal cultivation and oil extraction processes are found to be energy intensive hence exergy destructive. This study presents the ...
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Anaerobic digestion of macroalgae: methane potentials, pre-treatment, inhibition and co-digestion
In the present study we tested four macroalgae species – harvested in Denmark – for their suitability of bioconversion to methane. In batch experiments (53 °C) methane yields varied from 132 ml g volatile solids−1 (VS) for Gracillaria vermiculophylla, 152 ml g VS−1 for Ulva lactuca, 166 ml g VS−1 for Chaetomorpha linum and 340 ml g VS−1 for Saccharina latissima following 34 days of incubation. ...
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