Aspects of Carbon Dioxide Mitigation by Nannochloropsis oculata Cultured in a Photobioreactor

2014 ◽  
Vol 625 ◽  
pp. 775-779
Author(s):  
Vijendren Krishnan ◽  
Yoshimitsu Uemura ◽  
Suzana Yusup ◽  
Norridah Osman
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Emission ◽  
Lipid Synthesis ◽  
Carbon Dioxide Concentration ◽  
Nannochloropsis Oculata ◽  
Marine Microalgae ◽  
Biodiesel Production ◽  
Photobioreactor Design ◽  
Reduce Carbon Dioxide ◽  
Carbon Dioxide Mitigation

This paper primarily presents on carbon dioxide mitigation by marine microalgae. Among the potential marine microalgae,Nannochloropsis oculatahas been identified as a promising species which can be utilized to reduce carbon dioxide concentration via photosynthesis process. The growth ofN. oculataand lipid synthesis for biodiesel production is influenced by various aspects. The aspects that are focused in this paper include light source and intensity, temperature, carbon dioxide concentration, and photobioreactor design. Besides, emerging technologies that are able to increase the efficiency of carbon dioxide reduction were also highlighted. As a whole,N. oculatamight play a key role in reducing the global carbon dioxide emission as well as enhancing the biodiesel production.

scholarly journals Obtaining construction materials based on the dolomite lime of accelerated forced-carbonization hardening

Vestnik MGSU ◽  
2020 ◽  
pp. 43-57
Author(s):  
Tamara А. Bakhtina ◽  
Nikolay V. Lyubomirskiy ◽  
Aleksandr S. Bakhtin ◽  
Vitaliy V. Nikolaenko
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Emissions ◽  
Construction Material ◽  
Carbon Dioxide Emission ◽  
Construction Materials ◽  
Carbon Dioxide Concentration ◽  
Average Density ◽  
Burning Temperature ◽  
Physicomechanical Characteristics ◽  
Reduce Carbon Dioxide

Introduction. To solve the problem of increasing the concentration of greenhouse gases in the atmosphere leading to global environmental problems, searches of ways to reduce carbon dioxide emissions are conducted in the field of construction material production. lower burning temperature, lower carbon dioxide emissions, and further binding of the exuding carbon dioxide to insoluble compounds, which determine the obtainment of a dolomite lime-based material with high mechanical properties are characteristic of dolomite lime. Materials and methods. Dolomite rock with a fraction of 5 mm to 10 mm was burned in a laboratory chamber furnace, while the calcined product was ground to pass through a 1.25 mm mesh sieve and tempered with water. The dolomite lime obtained after hydration was pressed into cylinder samples with a diameter and a height of 30 mm. The samples were subjected to forced carbonization in a particular chamber at a certain carbon dioxide concentration and for a certain chamber holding time. Results. The physicomechanical characteristics of the experimental carbonized samples were determined (compressive strength of 2 to 36 MPa with an average density of 1500 to 1800 kg/m3). The samples got hard under conditions of an increased carbon dioxide concentration. The results obtained under laboratory conditions were tested under industrial conditions at a functioning enterprise by pressing a single brick batch, its subsequent carbonate hardening in a pilot industrial chamber for forced carbonization, and determination of the main standardized properties. Conclusions. The low-burned carbonate-hardened dolomite lime allows reducing carbon dioxide emission during production by means of lowering the burning temperature with the subsequent use of the exuding carbon dioxide for the implementation of carbonate hardening of dolomite lime-based products.

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

Feasibility of Biomass Ash (Cattle Manure Ash) Replacing Some Cement in Concrete to Reduce Carbon Dioxide Emission

2014 ◽  
Vol 919-921 ◽  
pp. 1979-1982
Author(s):  
Xi Zhu Tian ◽  
Shu Guang Zhou
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Emission ◽  
Electric Energy ◽  
Present Situation ◽  
Cattle Manure ◽  
Biomass Ash ◽  
Cement Production ◽  
National Economic ◽  
Reduce Carbon Dioxide Emission ◽  
Reduce Carbon Dioxide

Biomass ash (cattle manure ash, CMA) is a waste which comes from combustion cattle manure to gain heat and electric energy. Aim reducing the emission of carbon dioxide that comes from cement production in the period of realizing the Twelfth Five-Year Plan for National Economic and Social Development of China. emission of carbon dioxide of biomass (cattle manure) combustion, the chemical propriety of the biomass (cattle manure) ash and the CMAs present situation of application in concrete are studied in the paper. the result indicate that the biomass ash (CMA) replacing some cement in concrete is feasibility, the analysis will provide basic data for generalizing biomass ash (CMA) application in the concrete.

Measures to Reduce Carbon Dioxide Emission of China Cement Industry

2011 ◽  
Vol 233-235 ◽  
pp. 412-415 ◽  
Author(s):  
Li Xia Hao ◽  
Feng Qing Zhao ◽  
Peng Xiang Zhao
Keyword(s):  
Carbon Dioxide ◽  
Raw Materials ◽  
Carbon Dioxide Emission ◽  
Cement Industry ◽  
Oxide Content ◽  
Low Carbon ◽  
Dry Process ◽  
Implementation Approach ◽  
Concentration Degree ◽  
Reduce Carbon Dioxide

Cement industry bear the brunt in the tide of resisting global warming because of large carbon dioxide emission. Five low-carbon measures and implementation approach to Chinese cement industry was put forward: Increasing industrial concentration degree and developing new dry process cement; Processing waste in cement kilns and reducing the use of raw materials and fuels; Increasing the amount of admixture in cement; Producing cement from calcium oxide content solid waste; Taking energy-saving measures such as cogeneration and grinding technology.

scholarly journals Is China’s target of a 40-45% reduction in carbon dioxide emission plausible?

2017 ◽  
Vol 5 (1) ◽  
pp. 46-50 ◽  
Author(s):  
Mpho Bosupeng
Keyword(s):  
Economic Growth ◽  
Carbon Dioxide ◽  
Energy Consumption ◽  
Carbon Dioxide Emissions ◽  
Carbon Dioxide Emission ◽  
Environmental Preservation ◽  
Carbon Taxation ◽  
Reduce Emissions ◽  
Potential Damage ◽  
Reduce Carbon Dioxide

AbstractIn the early days of industrialisation, economists believed that the ramifications of economic growth will far outweigh the potential damage to the environment. Today the concern is the rising magnitude of emissions. Many economies are under immense pressure to reduce carbon dioxide emissions. Carbon taxation and absorption technologies seem to be the main mechanisms controlling emissions in different nations. China proposed her target of reducing carbon dioxide emissions by 40-45% by 2025. The purpose of this study is to determine if China’s ambition of reducing its carbon dioxide emissions is feasible. This investigation also examines the potential effects of China's emissions on the economic growth of other countries. The study demonstrates that China’s target may not only reduce her output, but may also adversely affect the economic growth of others. This article further reveals that unemployment in China is likely to soar during the reduction in emissions and energy consumption. Additionally, this paper evaluates the effects of green taxation on carbon dioxide emissions. In conclusion, there is a possibility that China may reach her emissions target by 2025. However, the country faces a dilemma between economic growth and environmental preservation. It is recommended that China should explore techniques which will reduce emissions but not impinge negatively on economic growth.

The Study on Community Energy Planning and Emission Reduction in China

2012 ◽  
Vol 433-440 ◽  
pp. 1442-1446 ◽  
Author(s):  
Zhi Hua Zhou ◽  
Zi Chao Tan ◽  
Guo Qiang Yang ◽  
She Ming Qiu
Keyword(s):  
Carbon Dioxide ◽  
Energy Consumption ◽  
Energy Conservation ◽  
Energy Saving ◽  
Carbon Dioxide Emissions ◽  
Carbon Dioxide Emission ◽  
Energy Structure ◽  
Regional Energy ◽  
Save Energy ◽  
Reduce Carbon Dioxide

Climate change is becoming a highlight of the world. As the world's second largest CO2 emission country, China faces increasing pressure. Energy consumption and utilizing is the major source of CO2 emissions. Optimization of the regional energy configuration can not only reduce energy consumption, but also reduce carbon dioxide emissions. Thus, it will achieve energy conservation and sustainable development. Based on the Eco-city constructed by China and Sino-Singapore, this paper calculates the regional energy-saving under the requirement of existing Energy Conservation Code, plans its energy saving quantity by taking some measurements and then predicts the carbon dioxide emission reductions. The result shows that using effective measures to save energy can reduce 227772t carbon dioxide emissions. Using renewable energy and energy saving measures will reduce 371414t CO2, which has a striking effect. So changing energy structure and using renew energy are main measures to reduce CO2 emission.

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