scholarly journals Influence of Organic Matrix and Cations on Bio-Methane Yield with Anthracite Methanogenic Consortium

2019 ◽  
Author(s):  
Dong Xiao ◽  
Enyuan Wang ◽  
Yidong Zhang
Keyword(s):  
Yeast Extract ◽  
Organic Matrix ◽  
Degradation Process ◽  
Ammonia Nitrogen ◽  
Ion Concentration ◽  
Methane Yield ◽  
Gas Reservoirs ◽  
Sodium Potassium ◽  
Secondary Biogenic Gas ◽  
Methanogenic Consortium

AbstractOrganic compounds fermentation of coal has been used to generate secondary biogenic gas and enhance gas reservoirs in coalbed. To enhance the bio-degradation process, culture nutrition plays an important role in remediating the nutritional deficiency of the coal seam. The influence of bio-methane yield with organic inputs and cations concentrations was examined. Research of organic matrix influence revealed that the traditional organic material except yeast extract should forbid, and the input of yeast extract should limit at 1.00g/L also. Further, the study demonstrated that the ion concentration of sodium, potassium, magnesium, calcium and ammonia nitrogen also influenced methane and carbon dioxide yields. And the optimize concentrations for Ca2+, K+, Na+, Mg2+ were 5.1, 1.7, 23 and 1.3 mmol/L. The Mg2+ was particularly sensitive in inhibiting CH4 metabolism processes largely for gas-coal methanogenic consortium.

scholarly journals Influence Of Organic Matrix And Cations On Bio-Methane Yield With Anthracite Methanogenic Consortium

2020 ◽  
Vol 4 (1) ◽  
pp. 1-7
Author(s):  
Yong Hou ◽  
Keyword(s):  
Yeast Extract ◽  
Organic Matrix ◽  
Degradation Process ◽  
Ammonia Nitrogen ◽  
Ion Concentration ◽  
Methane Yield ◽  
Coal Bed ◽  
Gas Reservoirs ◽  
Sodium Potassium ◽  
Methanogenic Consortium

Organic compounds fermentation of coal has been used to generate secondary biogenic gas and enhance gas reservoirs in coal bed. To enhance the bio-degradation process, culture nutrition plays an important role in remediating the nutritional deficiency of the coal seam. The influence of bio-methane yield with organic inputs and cation concentrations was examined. Research of organic matrix influence revealed that the traditional organic material except yeast extract should forbid, and the input of yeast extract should limit at 1.00g/L also. Further, the study demonstrated that the ion concentration of sodium, potassium, magnesium, calcium and ammonia nitrogen also influenced methane and carbon dioxide yields. And the optimize concentrations for Ca2+, K+, Na+, Mg2+ were 5.1, 1.7, 23 and 1.3 mmol/L. The Mg2+ was particularly sensitive in inhibiting CH4 metabolism processes largely for gas-coal methanogenic consortium.

scholarly journals Degradation of Remazol Brilliant Blue Using Plasma Electrolysis Method with NaCl and Fe2+ Ion Addition

2018 ◽  
Vol 67 ◽  
pp. 01012 ◽  
Author(s):  
Nelson Saksono ◽  
Dwiputra Muhammad Zairin ◽  
Fikri Averous
Keyword(s):  
Hydroxyl Radicals ◽  
Textile Industry ◽  
Degradation Process ◽  
Air Injection ◽  
Ion Concentration ◽  
Brilliant Blue ◽  
Initial Concentration ◽  
Plasma Electrolysis ◽  
Good Potential ◽  
Electrolysis Method

Remazol Brilliant Blue is a dye waste mostly generated by the textile industry and can be very dangerous to the environment. Plasma electrolysis is a method that can produce hydroxyl radicals in large quantities in order to degrade the dye compounds. This study aims to test the ability of plasma electrolysis method to degrade Remazol Brilliant Blue wastewater using NaCl as electrolyte, with the addition of Fe2+ ion and air injection. Before the degradation process was carried out, permanganometric test was performed to see the production of hydroxyl radicals with the variations of electrolyte concentration and voltage. The degradation process were investigated more specifically by looking at the effect of Fe2+ ion concentration and the initial concentration of Remazol Brilliant Blue. Remazol Brilliant Blue degradation reached 98.5% in 30 minutes where the initial concentration of Remazol Brilliant Blue is 100 ppm, voltage of 750 V, NaCl concentration 0.03 M,with the addition of 40 ppm Fe2+ ion and air injection. The results show that plasma electrolysis with NaCl as electrolyte using air injection has a good potential in degrading dye wastewater in the environment.

scholarly journals Effect of Copper Ion Sterilization on Bacterial Community in a Freshwater Recirculating Aquaculture System

2022 ◽  
Vol 79 (2) ◽  
Author(s):  
Jianjun Shan ◽  
Xiaoqing Tian ◽  
Chongwu Guan ◽  
Chenglin Zhang ◽  
Yulei Zhang ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Bacterial Species ◽  
Copper Ion ◽  
Ammonia Nitrogen ◽  
Ion Concentration ◽  
Rrna Gene ◽  
Brachydanio Rerio ◽  
Illumina Hiseq ◽  
Recirculating Aquaculture ◽  
Recirculating Aquaculture Systems

AbstractThe study aimed to evaluate the safety of copper ion sterilization based on copper ion residues in zebrafish (Brachydanio rerio), as well as bacterial community structure and diversity in recirculating aquaculture systems (RASs). The copper ion content was determined using national food safety standard GB 5009.13-2017. Bacterial community structures and alpha and beta diversity indexes were examined using the 16S rRNA gene sequences produced by Illumina HiSeq sequencing. The results revealed no significant copper ion enrichment in B. rerio when the copper ion concentration was 0.15 mg/L. The relative abundances of Erythrobacter, nitrite bacteria, and Flavanobacteria were clearly higher in the treatment group than in the control and differences in bacterial species richness and diversity were obvious. In addition, there was no sharp decrease in the microflora at the outflow of the copper ion generator. In conjunction with the changes in ammonia nitrogen, nitrate, and nitrite concentrations during the experiment, the results indicated that there were no significant effects on the purification efficacy of the biological filter, but the abundances of beneficial bacteria increased significantly. This is of great relevance in order to understand the response of bacterial communities affected by changing environmental conditions, such as copper ion sterilization.

scholarly journals Impurity Concentrations In Sea Ice

1977 ◽  
Vol 18 (78) ◽  
pp. 117-127 ◽  
Author(s):  
J.R. Addison
Keyword(s):  
Sea Ice ◽  
Sea Water ◽  
Ion Concentration ◽  
Concentration Profiles ◽  
Sodium Potassium ◽  
Ambient Temperatures ◽  
The Third ◽  
Different Types ◽  
Potassium Magnesium

Abstract Three different types of saline ice were cut into sections a few millimeters thick along planes parallel to the surface. The resulting melts were analyzed quantitatively for chloride, sulphate, sodium, potassium, magnesium, and calcium. Two of the specimens were artificial sea ice, grown in the laboratory at ambient temperatures of —30°C and - 15°C, respectively. A portion of the latter exhibited a clear, glassy, fresh-ice structure. The third was natural sea ire. The resulting ion concentration profiles and ion ratios are presented. For sections of widely varying salinity, the various ion ratios assumed values fairly close to those in natural sea-water.

Comparative assessment of biochemical parameters of Hariana, Hardhenu and Sahiwal breeds 

2018 ◽  
Author(s):  
Deepak Kumar ◽  
Sandeep Kumar ◽  
Sandeep Gera and Jyoti Yadav
Keyword(s):  
Alkaline Phosphatase ◽  
Potassium Chloride ◽  
Total Protein ◽  
Biochemical Parameters ◽  
Comparative Assessment ◽  
Sodium Ion ◽  
Ion Concentration ◽  
Sodium Potassium ◽  
Aspartate Amino Transferase ◽  
Biochemical Assessment

Present study was conducted on seventy two cattle of three groups’ viz., Hardhenu strain of cross bred cattle, Sahiwal and Hariana breeds comprising twenty four animals of each group/breed. The biochemical assessment was based on assay of sodium, potassium, chloride, blood urea nitrogen (BUN), creatinine, glucose, calcium, total protein, albumin, alkaline phosphatase (ALP), alanine amino transferase (ALT), aspartate amino transferase (AST), bilirubin (total and direct) and triglycerides parameters. Triglycerides, ALP, creatinine and potassium ion concentration were found to be higher in Hariana while direct bilirubin, ALT and sodium ion concentration were comparatively higher in Hardhenu. However, Albumin, calcium and glucose were observed to be at higher concentration in Sahiwal.

scholarly journals Evaluation of the i-STAT Portable Clinical Analyzer in Chickens (Gallus Gallus)

2007 ◽  
Vol 19 (4) ◽  
pp. 382-388 ◽  
Author(s):  
Hanspeter W. Steinmetz ◽  
Rainer Vogt ◽  
Sabine Kästner ◽  
Barbara Riond ◽  
Jean-Michel Hatt
Keyword(s):  
Point Of Care ◽  
Carbon Dioxide Tension ◽  
Avian Species ◽  
Ion Concentration ◽  
Blood Gas ◽  
Sodium Potassium ◽  
Hydrogen Ion Concentration ◽  
System Failures ◽  
Accuracy And Precision ◽  
Analytical Accuracy

The i-STAT portable clinical analyzer (PCA) was evaluated for performance in avian species. With the EG7+ cartridge, which provided results for hydrogen ion concentration, oxygen tension, carbon dioxide tension, sodium, potassium, ionized calcium, hematocrit, and various calculated parameters, analytical accuracy and precision were tested by comparing obtained values to those of established traditional blood gas and chemistry analyzers. Deming's regression and bias plots were used to compare i-STAT results with those obtained by laboratory professionals using benchtop analyzers. The reliability of the i-STAT PCA with EG7+ cartridges was good, with 0–5.7% system failures in measured values. Regression statistics were good for all blood gas analytes and acceptable for electrolytes and calculated parameters, except for potassium and base excess, for which the regression data or the discrepancy between the methods was too large. The system was reliable and easy to use and had an overall acceptable accuracy in avian species. These features, together with portability and small required blood volumes, make the i-STAT suitable for point-of-care use in critical avian patients, although single values require careful interpretation.

Seasonal nutrient and sodium accumulation in the macrophyte Pontederia cordata

1978 ◽  
Vol 56 (4) ◽  
pp. 417-425 ◽  
Author(s):  
I. L. Bayly ◽  
M. E. Shibley
Keyword(s):  
North America ◽  
Plant Material ◽  
Ion Concentration ◽  
Seasonal Growth ◽  
Sodium Potassium ◽  
Sodium Accumulation ◽  
Pontederia Cordata ◽  
Calcium Magnesium ◽  
Multiple Determination ◽  
Positive Correlations

A seasonal study of accumulation of calcium, magnesium, sodium, potassium, and phosphorus was made on Pontederia cordata L., an important component of wetlands in North America. Twice weekly sampling of soil and plant material was made from May 23, 1975, to September 23, 1975. Results were analysed using the prepared program POLYFIT TSL, which fits a curve to the data and prepares an R2 value (coefficient of multiple determination) for the data. Positive correlations between seasonal growth events of P. cordata and accumulation of individual ions were obtained from the analysis. In addition, a positive correlation between accumulation of ions and changes of ion concentration in the upper horizon of the soil was detected for potassium and magnesium.

Anaerobic degradation of carbon capture reclaimer MEA waste

2013 ◽  
Vol 67 (11) ◽  
pp. 2549-2559 ◽  
Author(s):  
S. Wang ◽  
J. Hovland ◽  
R. Bakke
Keyword(s):  
Removal Efficiency ◽  
Carbon Capture ◽  
Loading Rate ◽  
Nitrogen Concentration ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Cod Removal ◽  
Methane Yield ◽  
Organic Loading Rate ◽  
Cod Removal Efficiency

The anaerobic biodegradation of reclaimer MEA (monoethanolamine) waste (MEAw) with easily degradable co-substrates was investigated in a laboratory-scale bioreactor at room temperature during a 160 d experimental run. The reactor that was constructed with three phases to facilitate attached biofilm and suspended biomass retention for degradation of the complex and challenging MEAw performed well. A feed strategy of step-wise increasing organic loading rate (OLR) by either increasing feed MEAw concentration or the hydraulic loading rate was applied. The system performance was evaluated by chemical oxygen demand (COD) removal efficiency, methane yield, MEA removal, and the accumulation of ammonia and volatile fatty acid (VFA). The total COD removal efficiency initially was 93% when the feed was mainly easily degradable co-substrate. The total removal dropped to 75% at the end when MEAw constituted 60% of the feed COD. Ion chromatography results show that the MEA and some unidentified feed chemicals were almost completely consumed. The main products of MEAw degradation were ammonia, VFAs and biogas. The ammonia nitrogen concentration reached about 2.0 g/L, which may explain the observed inhibition of acetoclastic methanogenesis leading to acetate accumulation. Methane accounted for up to 80% of the biogas generated. The highest methane yield was 0.34 L/g-COD while the yield was 0.16 L/g-COD at the highest load. This study shows that more than 80% reclaimer MEAw COD degradation with a co-substrate can be maintained in a hybrid anaerobic bioreactor operated in a wide loading range.

In vitro mineralization on chitosan using solutions with excess of calcium and phosphate ions

2005 ◽  
Vol 20 (12) ◽  
pp. 3303-3311 ◽  
Author(s):  
Marisa Masumi Beppu ◽  
Marco Antonio Torres ◽  
Cassiano Gomes Aimoli ◽  
Gilberto Alessandre Soares Goulart ◽  
Cesar Costapinto Santana
Keyword(s):  
Organic Matrix ◽  
Porous Membrane ◽  
Ion Concentration ◽  
X Ray ◽  
Phosphate Ions ◽  
In Vitro Mineralization ◽  
Simulated Body Fluids ◽  
Deposition Processes ◽  
Deposit Characteristics

Pseudo-simulated body fluids (SBFs) were used in in vitro experiments to promote chitosan porous membrane calcification. Common SBFs, which had concentrations of phosphate or calcium ions doubled, were so named because they do not replicate, by rigor, a genuine body fluid ion concentration. The objective of using such calcification fluids was to study the influence of phosphate and calcium excess in solution on mineralization deposit characteristics. SEM-EDS analyses showed that morphology and composition of deposits varies depending on which ion (phosphate or calcium) is in excess; x-ray diffractograms show that deposits are poorly crystalline (like biological apatites) but still show better crystallinity in deposits generated from P-rich SBF. This result, added to previous ones [such as those reported by Beppu and Santana Mater. Res.5, 47 (2002)] where a difference in the interconnectivity of the inorganic and organic (matrix) phases was stressed, suggests different deposition processes for each situation.

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