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PubMed Journals Articles About "Novel Insight Into Influence Thermal Pretreatment Temperature Anaerobic" RSS

14:30 EDT 14th October 2019 | BioPortfolio

Novel Insight Into Influence Thermal Pretreatment Temperature Anaerobic PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Novel Insight Into Influence Thermal Pretreatment Temperature Anaerobic articles that have been published worldwide.

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Showing "novel insight into influence thermal pretreatment temperature anaerobic" PubMed Articles 1–25 of 17,000+

Investigation on methane yield of wheat husk anaerobic digestion and its enhancement effect by liquid digestate pretreatment.

There are few studies on the use of wheat husk for anaerobic digestion until now. In this study, the BMP (biochemical methane potential) of wheat husk without pretreatment and with liquid digestate (LD) soaking pretreatment was investigated. It was demonstrated that wheat husk could be potentially used as a single feeding substrate for anaerobic digestion with a methane yield of 68 mL/g VS and this yield could be enhanced to a maximum of 130.0 mL/g VS using LD soaking pretreatment, which increased the m...


A novel insight into the influence of thermal pretreatment temperature on the anaerobic digestion performance of floatable oil-recovered food waste: Intrinsic transformation of materials and microbial response.

The intrinsic reason determining digestion performance of 100-160 °C preheated food waste after recovering floatable oil (FO-recovered FW) was investigated using two-dimensional correlated infrared spectroscopy, three-dimensional fluorescence spectroscopy and high-throughput 16S rRNA amplicon sequencing. The results indicated that thermal temperature significantly affected CH production of FO-recovered FW due to different structural alteration degree of starch, protein, cellulose and lipid components. Fr...

Evaluation of methane production and energy conversion from corn stalk using furfural wastewater pretreatment for whole slurry anaerobic co-digestion.

In this study, corn stalk (CS) was pretreated with furfural wastewater (FWW) for whole slurry anaerobic digestion (AD), which increased the degradability of CS components, changed the parameters in pretreatment slurry and improved the biochemical methane potential (BMP). The ultimate goal was to optimize the time and temperature for FWW pretreatment and evaluate whether FWW pretreatment is feasible from BMP and energy conversion. The results of path analysis suggested that lignocellulosic degradability (LD)...


Phosphorus complexation of sewage sludge during thermal hydrolysis with different reaction temperature and reaction time by P K-edge XANES and P NMR.

Thermal hydrolysis pretreatment (THP) can improve sludge disintegration and biogas production. Phosphorus (P) is immobilized on hydrochars of sewage sludge (SS). It is critical to understand changes in P speciation in SS hydrochars under different reaction temperatures and reaction times during THP for reclamation and (re)cycling of P. This study combined sequential extraction, P liquid and solid-state nuclear magnetic resonance (NMR), and P K-edge X-ray absorption near edge structure (XANES) spectroscopy t...

Furfural wastewater pretreatment of corn stalk for whole slurry anaerobic co-digestion to improve methane production.

Previous studies showed that excellent anaerobic digestion performance could be achieved using acid pretreatment, whereas the development of acid pretreatment was limited by high cost of acid consumption and severe operation. The aim of this study consisted in expanding the possibilities of low-cost acid pretreatment method for anaerobic digestion. For this, the feasibility of substituting conventional acid pretreatment with furfural wastewater was verified, and the whole slurry anaerobic digestion was perf...

Biological pretreatment enhances the activity of functional microorganisms and the ability of methanogenesis during anaerobic digestion.

Biological pretreatment can increase the methane production of anaerobic digestion. In this study, stover was pretreated via microbial consortium prior to anaerobic digestion; through 16S rRNA gene and 16S rRNA amplicon sequencing and metatranscriptomic analysis, and the effects of the pretreatment on the microbial community and critical factors of the increased methane production were studied. Microbial community structure was less affected by the pretreatment, which ensures the stable performance of anaer...

Steam explosion pretreatment of rice straw to improve structural carbohydrates anaerobic digestibility for biomethanation.

Effectiveness of steam explosion (SE) pretreatment for deconstructing the complex structural carbohydrates (SC) and lignin recalcitrance properties of rice straw (RS) for conjunctive improvement of biofuel yield and waste valorization was evaluated. This work exhibited successful pretreatment of RS at a different pressure (1.2, 1.5, and 1.8 MPa) and retention (3, 6, 9, and 12 min) for enhancement of SC contribution to biomethane production. Regression analysis demonstrated that SE pretreatment efficiency ...

Rheokinetics of microalgae slurry during hydrothermal pretreatment processes.

Hydrothermal pretreatment is an efficient process for improving the productivity of biofuels from wet microalgae biomass. The rheological behavior of microalgae slurry is a significant parameter affecting the performance of hydrothermal pretreatment reactors. Herein, the dynamic rheological behavior of microalgae slurry during hydrothermal pretreatment was investigated for the first time. The results revealed that the insoluble organics released from microalgae cells was the main factor affecting the rheolo...

Optimizing pre-treatment conditions for anaerobic co-digestion of food waste and sewage sludge.

In this study, the optimum conditions of thermal-alkali pre-treatment and the performance of ammonia stripping were investigated for improving solubilization efficiency and methane yield in the anaerobic co-digestion of food waste (FW) and sewage sludge (SS). The reaction temperature, NaOH concentration and reaction time for the thermal-alkali pre-treatment were investigated to determine optimum pre-treatment conditions. Solubilization rate, volatile suspended solids (VSS) reduction rate and total volatile ...

Microbial community evolution and fate of antibiotic resistance genes during sludge treatment in two full-scale anaerobic digestion plants with thermal hydrolysis pretreatment.

Anaerobic digestion (AD) with thermal hydrolysis pretreatment is widely used as an efficient sludge treatment nowadays. However, the evolution of microbial community (especially for the archaea community), the fate of antibiotic resistance genes (ARGs), and their associations during such process in full-scale sludge treatment plants are rarely reported. Therefore, these scientific questions were explored at two full-scale sludge treatment plants through high-throughput sequencing and quantitative PCR. Resul...

Influence of ionic strength and thermal pretreatment on the freeze-thaw stability of Pickering emulsion gels.

Salt addition and thermal pretreatment were used to improve the freeze-thaw stability of Pickering emulsion gels (PEGs) stabilized by compound proteins. Thermal pretreatment with the presence of salt could promote the formation of gel-like structure and alter the interactions between the emulsion droplets of PEGs, sequentially increase the resistance of the PEGs to water separation, creaming, and oiling-off during freeze-thaw cycles (freeze at -20 °C for 22 h and thawing at 37 °C for 2 h), especia...

Thermal hydrolysis of sewage sludge partially removes organic micropollutants but does not enhance their anaerobic biotransformation.

Pretreatment technologies prior to anaerobic digestion (AD) have been developed with the aim of enhancing biogas productivity and reducing the presence of pathogens in digested sludge. Among them, thermal hydrolysis (TH) appears as the most promising one. In wastewater treatment plants (WWTPs) sludge is the end point of many organic micropollutants (OMPs), which was proved to lead to important environmental and human risks since sludge is commonly used in agriculture. The objective of this work is to determ...

Free ammonia pretreatment improves anaerobic methane generation from algae.

Anaerobic methane generation from algae is hindered by the slow and poor algae biodegradability. A novel free ammonia (NH i.e. FA) pretreatment technology was proposed in this work to enhance anaerobic methane generation from algae cultivated using a real secondary effluent. The algae solubilisation was 0.05-0.06 g SCOD/g TCOD (SCOD: soluble chemical oxygen demand; TCOD: total chemical oxygen demand) following FA pretreatment of 240-530 mg NH-N/L for 24 h, whereas the solubilisation was only 0.01 g ...

Electrochemical pretreatment of yard waste to improve biogas production: Understanding the mechanism of delignification, and energy balance.

In the present study, electrochemical pretreatment with a pair of graphite electrode was conducted to pretreat yard waste prior to anaerobic digestion. The Response Surface Methodology was employed to optimize the pretreatment conditions. To determine the mechanism of delignification physical and chemical properties of untreated and pretreated yard waste were investigated. In the subsequent anaerobic digestion of pretreated yard waste, the ultimate biogas production of 446 mL/g VS was achieved in comparis...

The effect of thermal transience on the perception of thermal comfort.

The present study tested the hypothesis that at any given ambient temperature (Ta), thermal comfort (TC) is not only a function of the temperature per se, but is also influenced by the temperatures rate of change and direction.

Effect of cephalexin after heterogeneous Fenton-like pretreatment on the performance of anaerobic granular sludge and activated sludge.

Effects of FeO NPs heterogeneous Fenton-like pretreatment on the physicochemical properties and microbial community structure of anaerobic granular sludge (AGS) and activated sludge (AS) with cephalexin were investigated. Results showed that the average removal rate of chemical oxygen demand (COD) by the AGS was 80.9%, 85.9%, 90.3% and 91.6%, respectively, at cephalexin without pretreatment, pretreatment with 20% (HO), 40% (HO) and 60% (HO). Compared to the reactor without pretreatment, the COD removal rate...

Theoretical understanding of the optimum conditions for a mainstream granular nitritation-anammox reactor coupled with anaerobic pretreatment.

Mainstream nitritation-anammox processes with anaerobic pretreatment may provide a paradigm-shifting strategy for achieving more energy-efficient and cost-saving wastewater treatment, and most efforts in this area were through bench studies. To better understand the performance of bench systems and make possible predication of key parameters beyond experiments, a mathematical model was developed in this study. The model inputs include hydraulic retention time (HRT), influent chemical oxygen demand (COD), su...

Natural freezing-thawing pretreatment of corn stalk for enhancing anaerobic digestion performance.

Natural freezing-thawing (NFT) was proposed as a low energy input and alternative pretreatment method for high biomethane production from corn stalk (CS) by anaerobic digestion (AD). The CS was pretreated by freezing-thawing in winter season using different pretreatment time periods (7d, 14d, 21d and 28d) and solid-to-liquid ratios (1:2, 1:4, 1:6, 1:8 and 1:10). The results showed that CS pretreated for 21d coupled with a solid-to-liquid ratio of 1:6 achieved the best result among all pretreatment condition...

Effect of hydrothermal pretreatment severity on the pretreatment characteristics and anaerobic digestion performance of corn stover.

The pretreatment characteristics and anaerobic digestion (AD) performance of corn stover were investigated at different hydrothermal pretreatment (HP) severity levels. The pretreatment of corn stover with and without ammonia was performed at different temperatures (100, 150, and 200 °C) and with a holding time of 5-30 mins. Results showed that after HP, the highest volatile fatty acid (VFAs) concentration was 10533.94 mg/L at a HP severity of 7.27, which was 1.72-3.35 times greater than those of others...

Liquid hot water pretreatment to enhance the anaerobic digestion of wheat straw-effects of temperature and retention time.

Wheat straw is an abundant agricultural waste that is rich in lignocellulose. However, its waxy surface, highly crystallized structure, and limited surface area make it difficult to be hydrolyzed and used efficiently by microorganisms. Liquid hot water (LHW) pretreatment was studied to explore the feasibility of improving the methane yield of wheat straw in anaerobic digestion (AD). The results showed that the crosslinking structure of wheat straw was broken by LHW pretreatment. Some pores and cracks appear...

Anomalous temperature dependent thermal conductivity of two dimensional silicon carbide.

Recently, two-dimensional silicon carbide (2D-SiC) has attracted considerable interest due to its exotic electronic and optical properties. Here, we explore the thermal properties of 2D-SiC using reverse non-equilibrium molecular dynamics simulation. At room temperature, a thermal conductivity of ~313 W/mK is obtained for 2D-SiC which is one order higher than that of silicene. Above room temperature, the thermal conductivity deviates the normal 1/T law and shows an anomalous slowly decreasing behavior. To e...

Evaluation of thermal pattern distributions in racehorse saddles using infrared thermography.

The impact of a rider's and saddle's mass on saddle thermal pattern distribution was evaluated using infrared thermography (IRT). Eighteen racehorses were ridden by four riders with their own saddle. Images of the saddle panels were captured at each of six thermographic examinations. On each image, six regions of interest (ROIs) were marked on the saddle panels. The mean temperature for each ROI was extracted. To evaluate the influence of load on saddle fit, 4 indicators were used: ΔTmax (difference betwee...

Combination of steam explosion pretreatment and anaerobic alkalization treatment to improve enzymatic hydrolysis of Hippophae rhamnoides.

The optimum condition of steam explosion pretreatment was screened for hippophae, and anaerobic calcium oxide (CaO) alkalization was further used to improve its enzymatic hydrolysis. Steam-exploded hippophae reached the lowest pH value (4.01) and the maximal hemicellulose removal (77.16%) at pressure 1.5 MPa and residence time 20 min. Lignocellulosic fractions of hippophae was remarkably reduced by CaO alkalization or steam explosion treatment, and enzymatic sugar yield was increased from 66 mg/g DM (...

"Roller coaster"-like thermal evolution of the Er ion's red photoluminescence in CaWO:Yb/Er phosphors.

The abnormal "roller coaster"-like thermal evolution of the Er ion's red photoluminescence (corresponding to the F4-I4 transition) in CaWO:Yb/Er phosphors is observed. This red emission suffers from a strong thermal quenching in the 293-573 K temperature range, followed by a sharp increase on further increasing the temperature. The mechanism behind this phenomenon is confirmed to be from the dynamic temperature-dependent multiple mechanisms imposed on the F4 state. At relatively low temperatures, the two-p...

Temperature dependence of thermal properties of ex-vivo liver tissue up to ablative temperatures.

Thermal properties of ex-vivo bovine liver were measured as a function of the temperature, by heating tissue samples in a temperature-controlled oil bath over a temperature range from about 21°C to about 113°C. Results evidenced temperature-dependent non-linear changes of the thermal properties, with the temperature of 100°C representing a break point: the thermal properties increased with temperature up to 99°C and then decreased above 100°C. The rate of increase appeared dramatic between 90°C and 99...


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