Preparation of volatile fatty acid (VFA) calcium salts by anaerobic digestion of glucose

2015 ◽  
Vol 62 (4) ◽  
pp. 476-482 ◽  
Author(s):  
Xiaofen Li ◽  
Janis E. Swan ◽  
Giridhar R. Nair ◽  
Alan G. Langdon
Keyword(s):  
Fatty Acid ◽  
Anaerobic Digestion ◽  
Volatile Fatty Acid ◽  
Calcium Salts

A Techno-Economic case for Volatile Fatty Acid Production for Increased Sustainability in the Wastewater Treatment Industry

2021 ◽  
Author(s):  
Ganesh K Veluswamy ◽  
Andy Ball ◽  
Richard Dinsdale ◽  
Alan Guwy ◽  
Kalpit Shah
Keyword(s):  
Wastewater Treatment ◽  
Fatty Acid ◽  
Anaerobic Digestion ◽  
Acid Production ◽  
Volatile Fatty Acid ◽  
Fugitive Emissions ◽  
Fatty Acid Production

Methane, the final product of methanogenesis during anaerobic digestion is a low value product (0.1$/m3). Concerns over fugitive emissions from methane coupled with recent reduction in costs of solar and...

scholarly journals Will Membranes Break Barriers on Volatile Fatty Acid Recovery from Anaerobic Digestion?

2020 ◽  
Author(s):  
Xiaobo Zhu ◽  
Aaron Leininger ◽  
David Jassby ◽  
Nicolas Tsesmetzis ◽  
Zhiyong Jason Ren
Keyword(s):  
Fatty Acid ◽  
Anaerobic Digestion ◽  
Volatile Fatty Acid ◽  
Acid Recovery

A new strategy to recover from volatile fatty acid inhibition in anaerobic digestion by photosynthetic bacteria

2020 ◽  
Vol 311 ◽  
pp. 123501 ◽  
Author(s):  
Weixin Zhao ◽  
Jinhui Jeanne Huang ◽  
Binbin Hua ◽  
Zhiyong Huang ◽  
Ronald L. Droste ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Anaerobic Digestion ◽  
Volatile Fatty Acid ◽  
Photosynthetic Bacteria ◽  
Acid Inhibition ◽  
New Strategy ◽  
Fatty Acid Inhibition

Overview of AD

2020 ◽  
Author(s):  
Jacob Joseph Lamb
Keyword(s):  
Fatty Acid ◽  
Anaerobic Digestion ◽  
Mathematical Models ◽  
Volatile Fatty Acid ◽  
Biological Process ◽  
Gas Production ◽  
Anaerobic Digester ◽  
Chemical Parameters ◽  
Reactor Configuration ◽  
Biogas Output

There are many methodologies for improving the biogas output from anaerobic digestion. These techniques include physical (e.g., gas production and feedstock parameters), reactor configuration and chemical parameters (e.g., pH and volatile fatty acid concentrations) within the digester can help to link particular functions and features of the process. Using this expanse of data, mathematical models can be used to understand and forecast the biological process within an anaerobic digester. Such models can then be further developed on a process and biological level to improve their ability to mimic the function of the reactor. This chapter will provide background into modelling and reactor configuration in order to obtain a digital twin of an anaerobic digester.

scholarly journals The utilization of diets containing acetate, propionate or butyrate salts by growing lambs

1978 ◽  
Vol 40 (2) ◽  
pp. 171-183 ◽  
Author(s):  
F. D. DeB Hovell ◽  
J. F. D. Greenhalgh
Keyword(s):  
Acetic Acid ◽  
Fatty Acid ◽  
Volatile Fatty Acid ◽  
Metabolizable Energy ◽  
Calcium Salts ◽  
Energy Retention ◽  
Per Se ◽  
Comparative Slaughter

1. In a comparative slaughter experiment growing lambs were given concentrate diets in which 7, 15 or 22% of the metabolizable energy (me) provided by barley was replaced by sodium and calcium salts of acetic acid, or 22% of me was replaced by Na and Ca salts of propionic or butyric acids.2. The efficiency of utilization for fattening (kf) of the diets containing 0, 7, 15 or 22% of me as acetate was 57.2, 59.6, 54.1 and 48.8 (se ± 1.8) respectively, the last value being significantly lower (P < 0.001) than the first. The kf for successive increments of acetate was 90, 37 and 19% (se ± 13), the decrease being significant (P < 0.001).3. The kf values of the diets containing 22% of me as propionate or butyrate respectively were 48.7 and 50.6 (se ± 1.8), both values being significantly lower than the control (P < 0.01). The partial kf of propionate was 19±13, and of butyrate 28 ± 13%.4. It is concluded that the experiment provided evidence that the efficiency with which acetate is utilized for energy retention is not constant, but varies with its contribution to me. The experiment also provided some evidence that large amounts of propionate and butyrate may be inefficiently utilized by growing lambs, although poor utilization of high levels of volatile fatty acid (VFA) salts per se cannot be entirely excluded.

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