Response surface methodology analysis of anaerobic syntrophic degradation of volatile fatty acids in an upflow anaerobic sludge bed reactor inoculated with enriched cultures

2012 ◽  
Vol 17 (1) ◽  
pp. 133-144 ◽  
Author(s):  
T. Amani ◽  
M. Nosrati ◽  
S. M. Mousavi
Keyword(s):  
Fatty Acids ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Volatile Fatty Acids ◽  
Anaerobic Sludge ◽  
Syntrophic Degradation ◽  
Enriched Cultures

scholarly journals Volatile Fatty Acids from Lipid-Extracted Yeast Provide Additional Feedstock for Microbial Lipid Production

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1009
Author(s):  
Gwon Woo Park ◽  
Seongsoo Son ◽  
Myounghoon Moon ◽  
Subin Sin ◽  
Kyoungseon Min ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Response Surface Methodology ◽  
Carbon Source ◽  
Response Surface ◽  
Volatile Fatty Acids ◽  
Lipid Production ◽  
Biodiesel Production ◽  
Microbial Lipid ◽  
Initial Ph ◽  
Microbial Lipid Production

Microbial lipid production from oleaginous yeasts is a promising process for the sustainable development of the microbial biodiesel industry. However, the feedstock cost poses an economic problem for the production of microbial biodiesel. After lipid extraction, yeast biomass can be used as an organic source for microbial biodiesel production. In this study, volatile fatty acids (VFAs), produced via anaerobic digestion of a lipid-extracted yeast (LEY) residue, were utilized as a carbon source for the yeast Cryptococcus curvatus. The response surface methodology was used to determine the initial pH and inoculum volume for the optimal VFA production. The experimental result for VFA concentration was 4.51 g/L at an initial pH of 9 and an inoculation 25%. The optimization results from the response surface methodology showed that the maximal VFA concentration was 4.58 g/L at an initial pH of 8.40 and an inoculation of 39.49%. This study indicates that VFAs from LEY can be used as a carbon source for microbial biodiesel production, with the potential to significantly reduce feedstock costs.

scholarly journals Optimization of simultaneous production of volatile fatty acids and bio-hydrogen from food waste using response surface methodology

RSC Advances ◽  
2018 ◽  
Vol 8 (19) ◽  
pp. 10457-10464 ◽  
Author(s):  
Nuo Liu ◽  
Jianguo Jiang ◽  
Feng Yan ◽  
Yiwen Xu ◽  
Meng Yang ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Food Waste ◽  
Volatile Fatty Acids ◽  
Traditional Approach ◽  
Interactive Effect ◽  
Simultaneous Production

Response surface methodology was applied to optimal VFA production from food waste, which could evaluate the interactive effect of each parameter as compared to the traditional approach about just one variable a time on VFA production.

Optimization of fatty acids extraction from Portulaca oleracea seed using response surface methodology

2013 ◽  
Vol 43 ◽  
pp. 405-411 ◽  
Author(s):  
Marta Stroescu ◽  
Anicuta Stoica-Guzun ◽  
Sorina Ghergu ◽  
Nicoleta Chira ◽  
Iuliana Jipa
Keyword(s):  
Fatty Acids ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Portulaca Oleracea

scholarly journals Anaerobic treatment of high-sulfate wastes

1986 ◽  
Vol 13 (4) ◽  
pp. 423-428 ◽  
Author(s):  
Jan A. Oleszkiewicz ◽  
Barry L. Hilton
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Cheese Whey ◽  
Oxygen Demand ◽  
Anaerobic Treatment ◽  
Pulp And Paper ◽  
Anaerobic Sludge ◽  
Dairy Wastes ◽  
High Sulfate ◽  
Cooking Liquor

Six parallel upflow anaerobic sludge bed reactors were operated at chemical oxygen demand (COD) loads from 3 to 10 kg COD/(m3∙d). Four reactors (R1–R4) were fed sodium sulfate at loads of 1–3 kg S-SO4/(m3∙d). Reactors R1 and R2 were fed spent cheese whey with R1 being operated in an unstripped and R2 in a stripped mode. At COD loads below 5 kg/(m3∙d), the removal in R1 was 60–80% COD and generally trailed R2 by a margin of 0–15%. At higher COD loads and at higher SO4/COD ratios, the performance of R1 deteriorated significantly. A similar situation was found in the pair R3 (unstripped) and R4 (stripped), which was fed a mixture of spent whey and sulfite cooking liquor. Reactors R5 and R6 were subjected to the same feed as R3 and R4, but no sulfate was added. A comparison of R4 with R6 indicated slightly lower COD removal in R4 with similar amounts of volatile fatty acids accumulating in both reactors in cases of overloading. Key words: anaerobic treatment, sulfides, methanogenesis, inhibition, sludge bed reactor, dairy wastes, pulp and paper wastes, sulfate reduction.

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