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Clostridium saccharoperbutylacetonicum N1-4 has great potentials for acetone-butanol-ethanol (ABE) production from lignocellulosic carbon sources. However, fundamental information about its metabolism of lignocellulosic sugars and tolerance to fermentation inhibitors is not available. Here, we systematically evaluated effects of representative sugars and lignocellulosic inhibitors on ABE fermentation...
The impacts of stress on the physical and optical properties of coals are well recognized, while the influence on the chemical structure is seldom considered. In the light of mechanochemistry research that mechanical force can act on the molecule directly to initiate or accelerate reactions by deforming the chemical bonds, it is meaningful to consider how stress works on the macromolecule of coals...
The eccentric needle motion has been regarded as an important cause of in-nozzle flow disturbances and hole-to-hole spray variations of modern fuel injectors. However, the experimental investigations on this subject have rarely been reported due to great difficulties in the direct measurements of eccentric needle motion and the flow characteristics of individual holes in an injection nozzle. In this...
Iron oxide facilitated methane production process has recently attracted more and more attention in the worldwide. On the other hand, soluble microbial products (SMPs) was found to play an important role in the wastewater treatment systems. The purpose of this study was to investigate the role of SMPs in the goethite (a typical iron oxide mineral) facilitated methanogenic process, where a dialysis...
Fuel atomization and vaporization process play a critical role in determining the engine combustion and emission. The primary near-nozzle breakup is the vital link between the fuel emerging from the nozzle and the fully atomized spray. In this study, the near-nozzle spray characteristics of diesel injectors with different umbrella angle (UA) were investigated using fast X-ray phase-contrast imaging...
This paper describes a novel route for the utilization of algal and lignocellulosic biomass for biofuel production. Dilute sulfuric acid treatment was employed to destroy the rigid algal cells and generate algal hydrolysate. Algal hydrolysate was used as the reaction medium for the enzymatic hydrolysis of lignocellulose from corn stover. The acid treatment parameters were optimized based on the enzymatic...
With the depletion of fossil energy, third-generation biofuel feedstocks represented by micro- and macro-algae have significant advantages. It has been shown that anaerobic digestion of algae is a simple and cost-effective strategy. In this study, goethite was added to continuous stirred-tank reactors (CSTRs) to promote the methanogenesis of algal biomass. The results indicated that biogas and methane...
Despite the fact that all modern diesel engines use multi-hole injectors, single-hole injectors are frequently used to understand the fundamental properties of high-pressure diesel injections due to their axisymmetric design of the injector nozzles. A multi-hole injector accommodates many holes around the nozzle axis to deliver adequate amount of fuel with small orifices. The off-axis arrangement...
Methane has been attracting increasing attention in the area of global carbon cycle and sustainable bioenergy. Interaction between iron containing minerals and microorganism played an important role in the anaerobic transformation of organic substances. In the current paper, change of methane production and microbial community in the goethite facilitated anaerobic digestion process using algal biomass...
Unveiling the near-field dynamics of high-speed and optically dense liquid fuel jets and sprays, such as velocity and turbulence intensity fields, is of great importance for successful interpretation and modeling of the spraying and combustion process in internal combustion engines. Characterizing the dynamics using conventional laser optical techniques have been difficult in the near-nozzle region...
Effects of FeCl 3 on anaerobic digestion of cyanobacterial biomass from Lake Chao, one of the most serious eutrophic freshwater lakes in China, were investigated. Results showed that FeCl 3 was one feasible additive for the anaerobic process and methane generation rate and yield were both enhanced. The maximum methane yield reached 234mLg −1 based on the degraded volatile solid...
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