Generation and Utilization of Volatile Fatty Acids and Alcohols in Hydrothermally Altered Sediments in the Guaymas Basin, Gulf of California

2019 ◽  
Vol 46 (5) ◽  
pp. 2637-2646 ◽  
Author(s):  
Guang‐Chao Zhuang ◽  
Andrew Montgomery ◽  
Vladimir A. Samarkin ◽  
Min Song ◽  
Jiarui Liu ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Gulf Of California ◽  
Volatile Fatty Acids ◽  
Guaymas Basin ◽  
Fatty Acids And Alcohols

scholarly journals Valorization of Glucose-Based Wastewater Through Production of Hydrogen, Volatile Fatty Acids and Alcohols

10.5772/67101 ◽  
2017 ◽  
Author(s):  
Eduardo Lucena Cavalcante de Amorim ◽  
Leandro Takano Sader ◽  
Lucas Rodrigues Ramos ◽  
Edson Luiz Silva
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Production Of Hydrogen ◽  
Fatty Acids And Alcohols

Volatile Fatty acids and Alcohols Production during Anaerobic Storage of Dairy Manure

2011 ◽  
Vol 54 (2) ◽  
pp. 599-607 ◽  
Author(s):  
H. M. El-Mashad ◽  
R. Zhang ◽  
V. Arteaga ◽  
T. Rumsey ◽  
F. M. Mitloehner
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Dairy Manure ◽  
Anaerobic Storage ◽  
Fatty Acids And Alcohols

scholarly journals Acidogenesis of dairy wastewater at various pH levels

2002 ◽  
Vol 45 (10) ◽  
pp. 201-206 ◽  
Author(s):  
H.-Q. Yu ◽  
H.H.P. Fang
Keyword(s):  
Fatty Acids ◽  
Chemical Oxygen Demand ◽  
Volatile Fatty Acids ◽  
Biomass Yield ◽  
Oxygen Demand ◽  
Dairy Wastewater ◽  
Alcohol Production ◽  
Mixed Liquor ◽  
Influence Of Ph ◽  
Fatty Acids And Alcohols

Continuous experiments were conducted to study the influence of pH in the range 4.0–6.5 on the acidification of dairy wastewater at 37°C with 12 hours of hydraulic retention in an upflow reactor. Results showed that degradation of dairy pollutants increased with pH from pH 4.0 to 5.5. At pH 5.5, 95% of carbohydrate, 82% of protein and 41% of lipid were degraded. Based on chemical oxygen demand (COD), 48.4% of dairy pollutants were converted into volatile fatty acids and alcohols in the mixed liquor, 6.1% into hydrogen and methane in biogas, and the remaining 4.9% into biomass. The biomass yield at pH 5.5 was estimated as 0.32 mg-VSS/mg-COD. Further increase of pH, up to 6.5, increased degradation of carbohydrate, protein and lipid only slightly, but resulted in the lowering of overall acid and alcohol production due to their increased conversion into methane. Acetate, propionate, butyrate and ethanol are the main products of acidogenesis. Productions of propionate and ethanol were favored at pH 4.0−4.5, whereas productions of acetate and butyrate were favored at pH 6.0−6.5.

Generation and Emissions of Volatile Fatty Acids and Alcohols during Anaerobic Storage of Dairy Manure

2010 ◽  
Author(s):  
Hamed M El-Mashad ◽  
Ruihong Zhang ◽  
Veronica Arteaga ◽  
Tom R Rumsey ◽  
Frank M Mitloehner
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Dairy Manure ◽  
Anaerobic Storage ◽  
Fatty Acids And Alcohols

Unravelling a microbial synergy to boost caproate production via carboxylates chain elongation with ethanol

2019 ◽  
Vol 26 (2) ◽  
pp. 63-71
Author(s):  
Ling Leng ◽  
Ying Wang ◽  
Peixian Yang ◽  
Takashi Narihiro ◽  
Masaru Konishi Nobu ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Microbial Consortia ◽  
Chain Elongation ◽  
Desulfovibrio Vulgaris ◽  
Rrna Gene ◽  
Selective Enrichment ◽  
Microbial Network ◽  
Cost Efficient ◽  
Rrna Gene Sequencing

Chain elongation of volatile fatty acids for medium chain fatty acids production (e.g. caproate) is an attractive approach to treat wastewater anaerobically and recover resource simultaneously. Undefined microbial consortia can be tailored to achieve chain elongation process with selective enrichment from anaerobic digestion sludge, which has advantages over pure culture approach for cost-efficient application. Whilst the metabolic pathway of the dominant caproate producer, Clostridium kluyveri, has been annotated, the role of other coexisting abundant microbiomes remained unclear. To this end, an ethanol-acetate fermentation inoculated with fresh digestion sludge at optimal conditions was conducted. Also, physiological study, thermodynamics and 16 S rRNA gene sequencing to elucidate the biological process by linking the system performance and dominant microbiomes were integrated. Results revealed a possible synergistic network in which C. kluyveri and three co-dominant species, Desulfovibrio vulgaris, Fusobacterium varium and Acetoanaerobium sticklandii coexisted. D. vulgaris and A. sticklandii (F. varium) were likely to boost the carboxylates chain elongation by stimulating ethanol oxidation and butyrate production through a syntrophic partnership with hydrogen (H2) serving as an electron messenger. This study unveils a synergistic microbial network to boost caproate production in mixed culture carboxylates chain elongation.

МЕТАБОЛИТЫ ПРОБИОТИЧЕСКИХ БАКТЕРИЙ ОТВЕЧАЮТ ЗА ЭФФЕКТИВНОСТЬ ДЕЙСТВИЯ ПРОБИОТИКА "ПРОФОРТ®"

2019 ◽  
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Broiler Chicks ◽  
Bacillus Sp

МЕЛИКИДИ В.Х., ТЮРИНА Д.Г., СЕЛИВАНОВ Д.Г., НОВИКОВА Н.И. ООО «БИОТРОФ», Санкт-Петербург Аннотация: Приведены данные исследования методом газожидкостной хроматомасс-спектрометрии метаболитов, синтезируемых пробиотическими бактериями, входящими в состав кормовой добавки «Профорт®». Проведен опыт в условиях интенсивного промышленного птицеводства по применению кормовой добавки «Профорт®» (50 тыс. голов бройлеров в группе). Среди метаболитов пробиотических штаммов Enterococcus sp. и Bacillus sp. обнаружены такие полезные вещества, как молочная кислота, уксусная, пропионовая и другие короткоцепочечные (летучие) жирные кислоты, активные пептиды. Результаты зоотехнического опыта показали, что при скармливании бройлерам пробиотика «Профорт®» (500 г/т) живая масса при убое в 40 дней была выше контроля на 6,9%, конверсия корма улучшилась на 3,0%, а европейский индекс продуктивности бройлеров - на 5,69%. Ключевые слова: ПРОБИОТИКИ, МЕТАБОЛИТЫ, ЛЕТУЧИЕ ЖИРНЫЕ КИСЛОТЫ, ЦЫПЛЯТА-БРОЙЛЕРЫ,ПРОДУКТИВНОСТЬ, PROBIOTICS, METABOLITES, VOLATILE FATTY ACIDS, BROILER CHICKS,PRODUCTIVITY

Studies on the Levels of Volatile Fatty Acids for Growing-Fattening Lambs

1962 ◽  
Vol 21 (1) ◽  
pp. 37-40 ◽  
Author(s):  
H. W. Essig ◽  
U. S. Garrigus ◽  
B. Connor Johnson
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids

Effect of Dietary Volatile Fatty Acids on Nitrogen Balance in Chickens.

1997 ◽  
Vol 34 (5) ◽  
pp. 349-351
Author(s):  
Hiroshi KAMISOYAMA ◽  
Zeng-Tao SUN ◽  
Mineo HASHIGUCHI ◽  
Yutaka ISSHIKI
Keyword(s):  
Fatty Acids ◽  
Nitrogen Balance ◽  
Volatile Fatty Acids
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