Bioelectrochemical systems for simultaneously production of methane and acetate from carbon dioxide at relatively high rate

2013 ◽  
Vol 38 (8) ◽  
pp. 3497-3502 ◽  
Author(s):  
Yong Jiang ◽  
Min Su ◽  
Yao Zhang ◽  
Guoqiang Zhan ◽  
Yong Tao ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Rate ◽  
Bioelectrochemical Systems

Methanol conversion in high-rate anaerobic reactors

2001 ◽  
Vol 44 (8) ◽  
pp. 7-14 ◽  
Author(s):  
J. Weijma ◽  
A.J.M. Stams
Keyword(s):  
Carbon Dioxide ◽  
Methanol Conversion ◽  
High Rate ◽  
Sulfate Reducing ◽  
Anaerobic Reactors ◽  
Substrate Level ◽  
Thermophilic Conditions ◽  
Mesophilic Digestion ◽  
Reducing Bacteria ◽  
Microbiological Aspects

An overview on methanol conversion in high-rate anaerobic reactors is presented, with the focus on technological as well as microbiological aspects. The simple C1-compound methanol can be degraded anaerobically in a complex way, in which methanogens, sulfate reducing bacteria and homoacetogens interact cooperatively or competitively at substrate level. This interaction has large technological implications as it determines the final product of methanol mineralization, methane or carbon dioxide. The degradation route of methanol may be entirely different when environmental conditions change. Direct methanogenesis from methanol seems the predominant mineralization route under mesophilic conditions both in the absence and the presence of sulfate. Under thermophilic conditions methanol oxidation to carbon dioxide and hydrogen appears to play an important role. The UASB technology for mesophilic digestion of methanolic waste has presently reached full-scale maturity. The potential of methanol as feedstock for anaerobic processes is discussed.

Comparison of oxygen and carbon dioxide balances in HRAP (high-rate algal ponds)

2003 ◽  
Vol 48 (2) ◽  
pp. 277-281 ◽  
Author(s):  
H. El Ouarghi ◽  
E. Praet ◽  
H. Jupsin ◽  
J.-L. Vasel
Keyword(s):  
Carbon Dioxide ◽  
Diurnal Variations ◽  
High Rate ◽  
Oxygen Balance ◽  
Oxygen Production ◽  
Tracer Gas ◽  
High Rate Algal Ponds ◽  
Hydrodynamic Study ◽  
Oxygen Production Rate ◽  
Photosynthesis And Respiration

We previously suggested a method to characterize the oxygen balance in High-Rate Algal Ponds (HRAPs). The method was based on a hydrodynamic study of the reactor combined with a tracer gas method to measure the oxygen transfer coefficient. From such a method diurnal variations of photosynthesis and respiration can be quantified and the net oxygen production rate determined. In this paper we propose a similar approach to obtain carbon dioxide balances in HRAPs. Then oxygen and carbon dioxide balances can be compared.

scholarly journals Comparative Analysis of Atmospheric Carbon Dioxide Concentration and Temperature between Forest and Non-Forested Domains in Oyo State, Nigeria

2021 ◽  
Vol 25 (3) ◽  
pp. 445-449
Author(s):  
B.M. Awosusi ◽  
I.S. Adamu ◽  
A.R. Orunkoyi ◽  
D.O. Atiba ◽  
A.A. Obe ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Atmospheric Carbon Dioxide ◽  
Anthropogenic Activities ◽  
Carbon Dioxide Concentration ◽  
High Rate ◽  
Afternoon Session ◽  
Forest Reserve ◽  
Positive Correlation ◽  
Routine Monitoring ◽  
Reduce Carbon Dioxide

This study was carried out to assess the concentration levels of CO2 and temperature and also to correlate their values among selected locations in Oyo State, Nigeria. CO2 and temperature readings were taken using a portable CO2 meter, and a GPS was use to capture co-ordinates of sample points, this was done twice a day. Data were collected from 7am to 11am for morning session while afternoon session data were collected between 1pm and  5pm making a total of 8 hours monitoring. There were negative correlation between CO2 and temperature in all the forests while we have positive correlation between CO2 and temperature in non-forested domains, this,  by implication, means that presence of trees in the forest reserve help to reduce Carbon dioxide during the day since trees  manufacture their food using CO2 in the presence of sunlight. Also, the positive correlation between CO2 and temperature in the towns is due to high rate of human anthropogenic activities during the day. The values of CO2 obtained in this study were higher when  compared with IPCC limit of 435 ppm (parts per million) of CO2 emission. Routine monitoring of carbon dioxide and public education is recommended. Keywords: Carbon dioxide, Temperature, Forest, Non-Forest, Forest Reserve

The vital role of electrode wettability in high-rate carbon dioxide electrochemical reduction

2021 ◽  
Author(s):  
Mengran Li ◽  
Mohamed Nazmi Idros ◽  
Yuming Wu ◽  
Thomas Burdyny ◽  
Sahil Garg ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Electrochemical Reduction ◽  
Vital Role ◽  
High Rate

scholarly journals Cobalt-Based Nonprecious Metal Catalysts Derived from Metal–Organic Frameworks for High-Rate Hydrogenation of Carbon Dioxide

2019 ◽  
Vol 11 (31) ◽  
pp. 27717-27726 ◽  
Author(s):  
Xiaofei Lu ◽  
Yang Liu ◽  
Yurong He ◽  
Andrew N. Kuhn ◽  
Pei-Chieh Shih ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Metal Organic Frameworks ◽  
Metal Catalysts ◽  
High Rate ◽  
Metal Organic ◽  
Nonprecious Metal ◽  
Hydrogenation Of Carbon Dioxide

THE PHYSIOLOGY OF HOST–PARASITE RELATIONS: I. THE ACCUMULATION OF RADIOACTIVE SUBSTANCES AT INFECTIONS OF FACULTATIVE AND OBLIGATE PARASITES INCLUDING TOBACCO MOSAIC VIRUS

1956 ◽  
Vol 34 (3) ◽  
pp. 389-405 ◽  
Author(s):  
Michael Shaw ◽  
D. J. Samborski
Keyword(s):  
Carbon Dioxide ◽  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
High Rate ◽  
Fungal Mycelium ◽  
Obligate Parasites ◽  
Tracer Techniques ◽  
Metabolic Products ◽  
Carbon Compounds ◽  
Host Parasite

Excised, parasitized leaves were placed with their bases in radioactive solutions or exposed to radioactive carbon dioxide and the uptake and distribution of the tracers followed by autoradiography. Carbon dioxide and 20 other carbon compounds, including sugars, amino and organic acids, phenols, and indoleacetic acid, and/or their metabolic products, as well as phosphate and calcium, accumulated strongly at uredial and conidial colonies of the obligate parasites Puccinia and Erysiphe, respectively. Accumulation of glucose occurred in the host tissue at the sites of mildew colonies on leaves from which the ectoparasitic fungal mycelium had been removed, paralleled the respiration, rate, increased progressively with the development of the parasites, and was most marked at type 4 infections. It was inhibited by sulphur dust (with mildew), sodium azide, 2,4-dinitrophenol and, reversibly, by anaerobiosis and was, therefore, dependent on aerobic respiration. On the other hand the tracers did not accumulate within senescent rust and mildew colonies or within the necrotic lesions produced by bacterial and fungal parasites which kill the tissues of their hosts. Radioactive glucose did not, but calcium and phosphate did, accumulate within young local lesions of tobacco mosaic virus on Nicotiana. The tracers did not enter dead areas on mechanically-wounded leaves and only accumulated at fresh wounds under conditions conducive to a high rate of water loss from the damaged surface. In conjunction with more conventional methods, tracer techniques provide a powerful method of attack on the problems of host–parasite relationships.

Development of an Efficient Procedure for Sustainable Low Carbon Cement Manufacturing Process

2015 ◽  
Vol 787 ◽  
pp. 142-146
Author(s):  
Siva Teja Chopperla ◽  
Rajeswari Jupalli ◽  
Deepak Kanraj ◽  
A. Bahurudeen ◽  
M.K. Haneefa ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Energy Consumption ◽  
Manufacturing Process ◽  
Carbon Dioxide Emissions ◽  
Cement Industry ◽  
High Rate ◽  
Effective Control ◽  
Low Carbon ◽  
Efficient Procedure ◽  
Cement Manufacturing

The consumption of Portland cement for the production of concrete is rapidly increasing because of the remarkable growth in the construction worldwide. Cement production is an energy intensive process. The energy consumption by the cement industry is estimated to be about 5% of the total global industrial energy consumption. Manufacturing process of cement consumes enormous quantities of raw materials from limited natural resources at a high rate and leads to their depletion. Due to the dominant use of carbon intensive fuels such as coal, the cement industry is a major emitter of carbon dioxide and other air pollutants. The cement industry contributes about 6 % of global carbon dioxide emissions which is the primary source of global warming. In addition to carbon dioxide emissions, significant amount of nitrogen oxides, sulphur dioxide, carbon monoxide, hydrocarbons and volatile organic compounds are emitted during cement manufacturing and causes severe environmental issues. In this regard, effective control techniques for reduction in carbon dioxide emissions from modern cement industry and an efficient procedure to achieve sustainable cement manufacturing process are discussed in this paper.

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