Interactive effects of carbohydrate, lipid, protein composition and carbon/nitrogen ratio on biogas production of different food wastes

2020 ◽  
Vol 312 ◽  
pp. 123566
Author(s):  
Shengrong Xue ◽  
Yanbo Wang ◽  
Xingang Lyu ◽  
Nan Zhao ◽  
Jinghui Song ◽  
...  
Keyword(s):  
Biogas Production ◽  
Protein Composition ◽  
Interactive Effects ◽  
Food Wastes ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio

scholarly journals Effect of Carbon/Nitrogen Ratio, Temperature, and Inoculum Source on Hydrogen Production from Dark Codigestion of Fruit Peels and Sewage Sludge

2019 ◽  
Vol 11 (7) ◽  
pp. 2139 ◽  
Author(s):  
Lirio María Reyna-Gómez ◽  
Carlos Eduardo Molina-Guerrero ◽  
Juan Manuel Alfaro ◽  
Santiago Iván Suárez Vázquez ◽  
Armando Robledo-Olivo ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Biogas Production ◽  
Physicochemical Characterization ◽  
Gompertz Model ◽  
Municipal Wastewater Treatment ◽  
Fruit Peel ◽  
Inoculum Source ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio

This paper studies the use of fruit peel biomass and waste sludge from municipal wastewater treatment plants in the metropolitan area of Monterrey, Mexico as an alternative way of generating renewable energy. Using a Plackett–Burman experimental design, we investigated the effects of temperature, inoculum source, and the C/N (Carbon/Nitrogen) ratio on dark fermentation (DF). The results indicate that it is possible to produce hydrogen using fruit peels codigested with sewage sludge. By adjusting the C/N ratio in response to the physicochemical characterization of the substrates, it was revealed that the quantities of carbohydrates and nitrogen were sufficient for the occurrence of the fermentation process with biogas production greater than 2221 ± 5.8 mL L−1Reactor and hydrogen selectivity of 23% (366 ± 1 mL H2·L−1Reactor) at the central point. The kinetic parameters (Hmax= 86.6 mL·L−1, Rm = 2.6 mL L−1 h−1, and λ = 1.95 h) were calculated using the modified Gompertz model. The quantification of soluble metabolites, such as acetic acid (3600 mg L−1) and ethyl alcohol (3.4 ± 0.25% v/v), confirmed the presence of acetogenesis in the generation of hydrogen.

Enhanced biogas production from poultry litter by improving the carbon nitrogen ratio

2018 ◽  
Vol 24 (4) ◽  
pp. 520
Author(s):  
K.K. Arun ◽  
P. Sivakumar ◽  
S.A. Pasupathy ◽  
Selvaraj Balaji ◽  
M. Sakthivel
Keyword(s):  
Biogas Production ◽  
Poultry Litter ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio

scholarly journals Efeitos da relação carbono/ nitrogênio na produção de biogás proveniente de resíduos sólidos orgânicos urbanos / Effects of the carbon-nitrogen ratio on the biogas production from municipal organic solid waste

2021 ◽  
Vol 7 (9) ◽  
pp. 87033-87044
Author(s):  
Caroline Cecílio Dornelas Regazi ◽  
Giovana Ribeiro De Almeida ◽  
Hiago Tavares De Souza ◽  
Marina Guião de Souza Lima ◽  
Roberto Guião de Souza Lima Júnior ◽  
...  
Keyword(s):  
Solid Waste ◽  
Biogas Production ◽  
Organic Solid Waste ◽  
Organic Solid ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio ◽  
Municipal Organic Solid Waste

Enhanced biogas production from poultry litter by improving the carbon nitrogen ratio

2018 ◽  
Vol 24 (4) ◽  
pp. 520
Author(s):  
Selvaraj Balaji ◽  
M. Sakthivel ◽  
S.A. Pasupathy ◽  
P. Sivakumar ◽  
K.K. Arun
Keyword(s):  
Biogas Production ◽  
Poultry Litter ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio

Environmental significance of atrazine in aqueous systems and its removal by biological processes: an overview

2013 ◽  
Vol 8 (2) ◽  
pp. 159-178 ◽  
Keyword(s):  
Drinking Water ◽  
Ground Water ◽  
Water Environment ◽  
Biological Processes ◽  
Biological Degradation ◽  
Environmental Significance ◽  
Carbon And Nitrogen ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio ◽  
Living Organisms

Atrazine, a chlorinated s-triazine group of herbicide is one of the most widely used pesticides in the World. Due to its extensive use, long half-life and various toxic properties, it has very high environmental significance. Up to 22 mg l-1 of atrazine was found in ground water whereas permissible limit of atrazine is in ppb level in drinking water. As per Indian standard there should not be any pesticide present in drinking water. Among many other treatment processes available, Incineration, adsorption, chemical treatment, phytoremediation and biodegradation are the most commonly used ones. Biological degradation of atrazine depends upon various factors like the operating environment, external carbon and nitrogen sources, carbon/ nitrogen ratio (C/N), water content and the bacterial strain. Although, general atrazine degradation pathways are available, the specific pathways in specific conditions are not yet clearly defined. In this paper extensive review has been made on the occurrence of atrazine in surface and ground water bodies, probable sources and causes of its occurrence in water environment, the toxicity of atrazine on various living organisms and its removal by biological processes.

scholarly journals Effects of Organic Fertilizer on Bok Choy Growth and Quality in Hydroponic Cultures

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 491
Author(s):  
Kazuki Kano ◽  
Hiroaki Kitazawa ◽  
Keitaro Suzuki ◽  
Ani Widiastuti ◽  
Hiromitsu Odani ◽  
...  
Keyword(s):  
Plant Root ◽  
Oxygen Deficiency ◽  
Organic Fertilizer ◽  
Corn Steep Liquor ◽  
Ascorbic Acid Content ◽  
Growth And Yield ◽  
Significant Difference ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio ◽  
Steep Liquor

Effects of corn steep liquor (organic fertilizer, OF) and conventional chemical fertilizer (CF) on the growth and yield of bok choy (Brassica rapa var. chinensis) in summer and autumn hydroponic growing systems were compared. When OF and CF were applied with the same amount of total nitrogen in summer cultivation, there was no significant difference between yields; however, the growth rate in OF was slower than in CF. When OF was applied with twice the amount of nitrogen in CF (OF2), bok choy growth and yield were significantly inhibited in summer cultivation, likely owing to dissolved oxygen deficiency and different rates of nitrification and nitrogen absorbance by the plant root. Although the contents of potassium, calcium, and magnesium in bok choy showed no difference among the three treatments in both cultivation seasons, the carbon/nitrogen ratio tended to be higher in OF and OF2 than in CF. Lower nitric acid and higher ascorbic acid content was found in OF and OF2 than in CF. Overall, our results suggest that a comparable yield is expected by using the same nitrogen amount with a conventional recipe of chemical fertilization in autumn cultivation. However, further improvement of hydroponic management is needed in summer cultivation.

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