scholarly journals Study on Hydrogen Sulfide Gas Production Potential Test for Ground Improvement by Recycled Gypsum and Lime

2012 ◽  
Vol 61 (1) ◽  
pp. 31-36
Author(s):  
Kazuto ENDO ◽  
Mikako NAKAGAWA ◽  
Hirofumi SAKANAKURA ◽  
Yuzo INOUE ◽  
Masahiro I ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Ground Improvement ◽  
Gas Production ◽  
Production Potential ◽  
Recycled Gypsum ◽  
Potential Test

scholarly journals Application of Ozone and Oxygen to Reduce Chemical Oxygen Demand and Hydrogen Sulfide from a Recovered Paper Processing Plant

2010 ◽  
Vol 2010 ◽  
pp. 1-6 ◽  
Author(s):  
Patricia A. Terry
Keyword(s):  
Hydrogen Sulfide ◽  
Chemical Oxygen Demand ◽  
Contact Time ◽  
Oxygen Demand ◽  
Gas Production ◽  
Injection System ◽  
Processing Plant ◽  
Short Contact Time ◽  
Production Of Hydrogen ◽  
Fox River

A pilot study was performed at the Fox River Fiber recovered paper processing company in DePere, Wisconsin, to determine the extent to which injection of oxygen and ozone could reduce the high chemical oxygen demand, COD, in the effluent and the effectiveness of the ozone/oxygen stream in suppressing production of hydrogen sulfide gas in downstream sewage lines. Adaptive Ozone Solutions, LLC, supplied the oxygen/ozone generation and injection system. Samples were analyzed both before and after oxygen/ozone injection. Hydrogen sulfide gas was continuously monitored at sewer stations downstream of Fox River Fiber. Results showed that with a very short contact time, effluent COD was reduced by over 15%. A simple kinetic model predicts that a contact time of fewer than 30 minutes could reduce COD by as much as 60%. In addition, downstream hydrogen sulfide gas production in the sewage mains was also better controlled, such that costly Bioxide applications could be reduced.

scholarly journals SOIL CONTROLLING FACTORS OF METHANE GAS PRODUCTION FROM FLOODED RICE FIELDS IN PATI DISTRICT, CENTRAL JAVA

2016 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
P. Setyanto ◽  
Rosenani A.B. ◽  
A.K. Makarim ◽  
Che Fauziah I. ◽  
A. Bidin ◽  
...  
Keyword(s):  
Great Influence ◽  
Gas Production ◽  
Rice Fields ◽  
Limiting Factors ◽  
Stepwise Multiple Regression ◽  
Ch4 Emission ◽  
Atmospheric Methane ◽  
Production Potential ◽  
Central Java ◽  
Ch4 Production

Atmospheric methane (CH4) is recognized as one of the most important greenhouse gases. Methane, with some 15-30 times greater infrared-absorbing capability than CO2 on a mass basis, may account for 20% of anticipated global warming. Soils are one of the key factors, which play an important role in CH4 production and emission. However, data on CH4 emission from different soil types and the characteristics affecting CH4 production are lacking when compared to data on agronomic practices. This study was conducted to investigate the potential of CH4 production of selected soils in Java, and determine the limiting factors of CH4 production. The results showed that addition of 1% glucose to the soils led to an increase in CH4 production by more than twelve fold compared to no glucose addition. The CH4 production potential ranged between 3.21 and 112.30 mg CH4 kg-1 soil. The lowest CH4 production potential occurred in brown-grayish Grumosol, while the highest was in dark-gray Grumosol. Chemical and physical properties of the soils have great influence on CH4 production. Stepwise multiple regression analysis of CH4 production and soil characteristics showed that pH and the contents of Fe2O3, MnO2, SO4, and silt in the soil strongly influenced CH4 production. Results of this study can be used for further development of a model on CH4 emission from rice fields.

scholarly journals SOIL CONTROLLING FACTORS OF METHANE GAS PRODUCTION FROM FLOODED RICE FIELDS IN PATI DISTRICT, CENTRAL JAVA

2016 ◽  
Vol 3 (1) ◽  
pp. 1 ◽  
Author(s):  
P. Setyanto ◽  
Rosenani A.B. ◽  
A.K. Makarim ◽  
Che Fauziah I. ◽  
A. Bidin ◽  
...  
Keyword(s):  
Great Influence ◽  
Gas Production ◽  
Rice Fields ◽  
Limiting Factors ◽  
Stepwise Multiple Regression ◽  
Ch4 Emission ◽  
Atmospheric Methane ◽  
Production Potential ◽  
Central Java ◽  
Ch4 Production

Atmospheric methane (CH4) is recognized as one of the most important greenhouse gases. Methane, with some 15-30 times greater infrared-absorbing capability than CO2 on a mass basis, may account for 20% of anticipated global warming. Soils are one of the key factors, which play an important role in CH4 production and emission. However, data on CH4 emission from different soil types and the characteristics affecting CH4 production are lacking when compared to data on agronomic practices. This study was conducted to investigate the potential of CH4 production of selected soils in Java, and determine the limiting factors of CH4 production. The results showed that addition of 1% glucose to the soils led to an increase in CH4 production by more than twelve fold compared to no glucose addition. The CH4 production potential ranged between 3.21 and 112.30 mg CH4 kg-1 soil. The lowest CH4 production potential occurred in brown-grayish Grumosol, while the highest was in dark-gray Grumosol. Chemical and physical properties of the soils have great influence on CH4 production. Stepwise multiple regression analysis of CH4 production and soil characteristics showed that pH and the contents of Fe2O3, MnO2, SO4, and silt in the soil strongly influenced CH4 production. Results of this study can be used for further development of a model on CH4 emission from rice fields.

Cotton Valley Production Enhancement Team Points Way to Full Gas Production Potential

1992 ◽  
Author(s):  
J.L. Hunter ◽  
R.S. Leonard ◽  
D.G. Andrus ◽  
L.R. Tschirhart ◽  
J.A. Daigle
Keyword(s):  
Gas Production ◽  
Production Potential ◽  
Cotton Valley

Evaluation and comparison of gas production potential of the typical four gas hydrate deposits in Shenhu area, South China sea

Energy ◽  
2020 ◽  
Vol 204 ◽  
pp. 117955 ◽  
Author(s):  
Li Huang ◽  
Zhenyuan Yin ◽  
Yizhao Wan ◽  
Jianye Sun ◽  
Nengyou Wu ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Gas Hydrate ◽  
Gas Production ◽  
Production Potential ◽  
Shenhu Area ◽  
China Sea ◽  
Gas Hydrate Deposits

Elucidation and control of biofilm formation processes in water treatment and distribution using the unified biofilm approach

2003 ◽  
Vol 47 (5) ◽  
pp. 83-90 ◽  
Author(s):  
D. van der Kooij ◽  
J.S. Vrouwenvelder ◽  
H.R. Veenendaal
Keyword(s):  
Water Treatment ◽  
Biofilm Formation ◽  
Distribution Systems ◽  
Formation Rate ◽  
Formation Processes ◽  
Production Potential ◽  
Active Biomass ◽  
Treated Water ◽  
And Control ◽  
Potential Test

Controlling biological processes in water treatment and distribution is a major challenge to water supply companies. In the Netherlands, the use of chlorine-based disinfectants in water treatment is limited as much as possible and treated water is distributed without disinfectant residual in most cases. Biofilm formation processes in water treatment and distribution are studied using adenosinetriphosphate (ATP) as the parameter for active biomass. ATP measurements are applied to assess biofilm concentrations in distribution systems, in the biofilm monitor to determine the biofilm formation rate of treated water, in the biomass production potential test to determine the effect of pipe materials on microbial growth and in membrane systems to quantify biofouling. The use of a single parameter enables to compare biofilm concentrations in all situations and contributes to the understanding and control of biofilm formation processes in water treatment and distribution. This approach has been designated as the Unified Biofilm Approach.

Effects of Distillers Grains and Substrate Steam-Flaked Corn Concentration on In Vitro Dry Matter Disappearance, Gas Production Kinetics, and Hydrogen Sulfide Production1

2010 ◽  
Vol 26 (4) ◽  
pp. 365-374 ◽  
Author(s):  
M.J. Quinn ◽  
M.L. May ◽  
N. DiLorenzo ◽  
D.R. Smith ◽  
M.L. Galyean
Keyword(s):  
Hydrogen Sulfide ◽  
Dry Matter ◽  
Gas Production ◽  
Distillers Grains ◽  
Production Kinetics

Out of the Lab, Into the Frying Pan: Understanding the Effect of Natural Groundwater Conditions on Bio-Based Ground Improvement Strategies

2020 ◽  
Author(s):  
Caitlyn Hall ◽  
Bruce Rittmann ◽  
Leon van Paassen ◽  
Edward Kavazanjian
Keyword(s):  
Calcium Carbonate ◽  
Ground Improvement ◽  
Gas Production ◽  
Future Application ◽  
Biogeochemical Model ◽  
Comprehensive Treatment ◽  
Improvement Strategy ◽  
Geochemical Environment ◽  
Biogenic Gas ◽  
Existing Structures

<p>We are developing a biogeochemical model for microbial denitrification-driven ground improvement to account for t the complexities expected in the field, including microbial inhibition and competition. We will use this model to support Microbially Induced Desaturation and Precipitation (MIDP) via denitrification as a bio-based ground improvement strategy alternative considering different treatment recipes and natural groundwater composition. Current ground improvement techniques have limited utility underneath or near existing structures. Developing alternatives is becoming increasingly important as urbanization increases. Large, centralized populations and infrastructure are more vulnerable to threats by natural disasters and geologic hazards such as earthquake-induced liquefaction and flooding. Bio-based ground stabilization techniques may be less disruptive to deploy and monitor, allowing application underneath existing structures. MIDP is a two-stage ground-improvement process in which biogenic gas desaturation provides immediate improvement while calcium carbonate precipitation provides long term stability. MIDP influences the geochemical environment and the hydro-mechanical behavior of soils through biogenic gas production, precipitation of calcium carbonate, and biomass growth. All three components alter the biogeochemical environment and subsurface permeability, thereby affecting the transport of substrates and subsequent product formation. The products of MIDP mitigate liquefaction at the lab-scale. MIDP experimentation and modeling have primarily considered only the use of de-ionized water and simplified water composition. However, denitrifying microorganisms compete with alternative electron acceptors, like sulfate and iron, and are influenced by the environment’s pH and salinity which may impede the MIDP treatment. Our biogeochemical model can predict the products and by-products of MIDP treatment considering realistic groundwater conditions. The results of this model will be used to develop comprehensive treatment plans for upcoming field trials to demonstrate treatment effectiveness and develop best practices for future application.</p>

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