Effects of pH control and concentration on microbial oil production from Chlorella vulgaris cultivated in the effluent of a low-cost organic waste fermentation system producing volatile fatty acids

2015 ◽  
Vol 184 ◽  
pp. 245-250 ◽  
Author(s):  
Hyun Uk Cho ◽  
Young Mo Kim ◽  
Yun-Nam Choi ◽  
Xu Xu ◽  
Dong Yun Shin ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Chlorella Vulgaris ◽  
Organic Waste ◽  
Volatile Fatty Acids ◽  
Low Cost ◽  
Oil Production ◽  
Ph Control ◽  
Microbial Oil ◽  
Fermentation System ◽  
Effects Of Ph

scholarly journals Volatile Fatty Acids (VFAs) Generated by Anaerobic Digestion Serve as Feedstock for Freshwater and Marine Oleaginous Microorganisms to Produce Biodiesel and Added-Value Compounds

2021 ◽  
Vol 12 ◽  
Author(s):  
Alok Patel ◽  
Amir Mahboubi ◽  
Ilona Sárvári Horváth ◽  
Mohammad J. Taherzadeh ◽  
Ulrika Rova ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Anaerobic Digestion ◽  
Food Waste ◽  
Environmental Sustainability ◽  
Volatile Fatty Acids ◽  
Oil Production ◽  
Added Value ◽  
Microbial Oil ◽  
Omega 3 ◽  
Freshwater Microalgae

Given an increasing focus on environmental sustainability, microbial oils have been suggested as an alternative to petroleum-based products. However, microbial oil production relies on the use of costly sugar-based feedstocks. Substrate limitation, elevated costs, and risk of contamination have sparked the search for alternatives to sugar-based platforms. Volatile fatty acids are generated during anaerobic digestion of organic waste and are considered a promising substrate for microbial oil production. In the present study, two freshwater and one marine microalga along with two thraustochytrids were evaluated for their potential to produce lipids when cultivated on volatile fatty acids generated from food waste via anaerobic digestion using a membrane bioreactor. Freshwater microalgae Auxenochlorella protothecoides and Chlorella sorokiniana synthesized lipids rich in palmitic acid (C16:0), stearic acid (C18:0), oleic acid (C18:1), and linoleic acid (C18:2). This composition corresponds to that of soybean and jatropha oils, which are used as biodiesel feedstock. Production of added-value polyunsaturated fatty acids (PUFA) mainly omega-3 fatty acids was examined in three different marine strains: Aurantiochytrium sp. T66, Schizochytrium limacinum SR21, and Crypthecodinium cohnii. Only Aurantiochytrium sp. T66 seemed promising, generating 43.19% docosahexaenoic acid (DHA) and 13.56% docosapentaenoic acid (DPA) in total lipids. In summary, we show that A. protothecoides, C. sorokiniana, and Aurantiochytrium sp. T66 can be used for microbial oil production from food waste material.

scholarly journals Valorization of volatile fatty acids derived from low-cost organic waste for lipogenesis in oleaginous microorganisms-A review

2021 ◽  
Vol 321 ◽  
pp. 124457
Author(s):  
Alok Patel ◽  
Omprakash Sarkar ◽  
Ulrika Rova ◽  
Paul Christakopoulos ◽  
Leonidas Matsakas
Keyword(s):  
Fatty Acids ◽  
Organic Waste ◽  
Volatile Fatty Acids ◽  
Low Cost ◽  
Oleaginous Microorganisms

Use of organic waste for biohydrogen production and volatile fatty acids via dark fermentation and further processing to methane

2019 ◽  
Vol 44 (44) ◽  
pp. 24110-24125 ◽  
Author(s):  
Tobias Weide ◽  
Elmar Brügging ◽  
Christof Wetter ◽  
Antonio Ierardi ◽  
Marc Wichern
Keyword(s):  
Fatty Acids ◽  
Organic Waste ◽  
Volatile Fatty Acids ◽  
Dark Fermentation ◽  
Biohydrogen Production

Conversion of organic waste into volatile fatty acids – The influence of process operating parameters

2018 ◽  
Vol 345 ◽  
pp. 395-403 ◽  
Author(s):  
Ewelina Jankowska ◽  
Anna Duber ◽  
Joanna Chwialkowska ◽  
Mikolaj Stodolny ◽  
Piotr Oleskowicz-Popiel
Keyword(s):  
Fatty Acids ◽  
Organic Waste ◽  
Volatile Fatty Acids ◽  
Operating Parameters

Effect of diet on individual volatile fatty acids in the rumen of sheep, with particular reference to the effect of low rumen pH and adaptation on high-starch diets

1957 ◽  
Vol 8 (6) ◽  
pp. 691 ◽  
Author(s):  
RL Reid ◽  
JP Hogan ◽  
PK Briggs
Keyword(s):  
Fatty Acids ◽  
Propionic Acid ◽  
Butyric Acid ◽  
Acid Production ◽  
Volatile Fatty Acids ◽  
Maximum Level ◽  
Fatty Acid Production ◽  
Rumen Ph ◽  
Term Change ◽  
Effects Of Ph

Detailed data are presented on changes in the proportions of acetic, propionic, and butyric acids in the rumen after feeding on various diets. Pre-feeding proportions were constant on each diet but varied from a mixture of 72-76 per cent. acetic, 14-16 per cent. propionic, and 10-12 per cent. butyric acid on all-roughage diets to one of 63-65 per cent. acetic, 18-20 per cent. propionic, and 16-18 per cent. butyric acid on a diet containing 70 per cent. wheat grain. On all diets the proportion of propionic acid increased after feeding and reached a peak which coincided with the maximum level of total volatile fatty acids. The response of butyric acid was variable, low levels being recorded on a diet of lucerne chaff and on one containing a high proportion of cracked maize. The proportion of acetic acid always declined after feeding. These responses were modified in experiments on rations containing high proportions of wheaten starch, in which rumen pH fell below 5.0 as a result of lactic acid accumulation. When animals were first fed on such diets, a decline in rumen pH below 5.0-5.5 after feeding was always associated with a pronounced decline in the proportions of propionic and butyric acids, to levels as low as 8 and 5 per cent. respectively. Continued feeding of such diets did not affect the response of butyric acid, but there was evidence of a change in propionic acid production in response to low pH conditions, both in respect to short-term change during experiments in which low rumen pH levels were maintained for considerable periods and to long-term change when such diets were fed intermittently over considerable periods. The implications of these findings are discussed with respect to the effects of pH on individual volatile fatty acid production in the rumen, and on the qualitative nature of the microbial population and on their metabolic patterns.

DietaryChlorella vulgarismicroalgae improves feed utilization, milk production and concentrations of conjugated linoleic acids in the milk of Damascus goats

2016 ◽  
Vol 155 (3) ◽  
pp. 508-518 ◽  
Author(s):  
A. E. KHOLIF ◽  
T. A. MORSY ◽  
O. H. MATLOUP ◽  
U. Y. ANELE ◽  
A. G. MOHAMED ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Milk Yield ◽  
Chlorella Vulgaris ◽  
Volatile Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Control Diet ◽  
Serum Glucose ◽  
Ruminal Ph ◽  
Randomized Design ◽  
Total Conjugated Linoleic Acid

SUMMARYFifteen lactating Damascus goats (44 ± 0·8 kg body weight) were used in a completely randomized design to evaluate the supplementation ofChlorella vulgarismicroalgae at 0 (Control), 5 (Alg05) and 10 g/goat/day (Alg10) for 12 weeks.Chlorella vulgaristreatments increased feed intake and apparent diet digestibility compared with a control diet. No differences were noted in the ruminal pH and ammonia-N concentrations, but increased concentration of total volatile fatty acids and propionic acid were observed in goats fed with Alg05 and Alg10. Diets of Alg05 and Alg10 increased serum glucose concentration but decreased glutamate-oxaloacetate transaminase, glutamate-pyruvate transaminase and cholesterol concentrations. Additionally,C. vulgarissupplementation moderately increased milk yield, energy corrected milk, total solids, solids not fat and lactose. Feeding Alg05 and Alg10 diets increased milk unsaturated fatty acids with concomitant increases in total conjugated linoleic acid concentrations. It is concluded that the daily inclusion of 5 or 10 g ofC. vulgarisin the diets of Damascus goats increased milk yield and positively modified milk fatty acid profile.

scholarly journals Volatile Fatty Acid Production from Organic Waste with the Emphasis on Membrane-Based Recovery

Fermentation ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 159
Author(s):  
Prawat Sukphun ◽  
Sureewan Sittijunda ◽  
Alissara Reungsang
Keyword(s):  
Organic Waste ◽  
Volatile Fatty Acids ◽  
Low Cost ◽  
Cost Effective ◽  
Future Research ◽  
Fatty Acid Production ◽  
Factors Affecting ◽  
Acidogenic Fermentation ◽  
Recovery Techniques ◽  
Biotechnological Processes

In recent years, interest in the biorefinery concept has emerged in the utilization of volatile fatty acids (VFAs) produced by acidogenic fermentation as precursors for various biotechnological processes. This has attracted substantial attention to VFA production from low-cost substrates such as organic waste and membrane based VFA recovery techniques to achieve cost-effective and environmentally friendly processes. However, there are few reviews which emphasize the acidogenic fermentation of organic waste into VFAs, and VFA recovery. Therefore, this article comprehensively summarizes VFA production, the factors affecting VFA production, and VFA recovery strategies using membrane-based techniques. Additionally, the outlook for future research on VFA production is discussed.

The use of organic waste-derived volatile fatty acids as raw materials of C4-C5 bioalcohols

2018 ◽  
Vol 201 ◽  
pp. 14-21 ◽  
Author(s):  
Seong-Heon Cho ◽  
Taejin Kim ◽  
Kitae Baek ◽  
Jechan Lee ◽  
Eilhann E. Kwon
Keyword(s):  
Fatty Acids ◽  
Organic Waste ◽  
Volatile Fatty Acids ◽  
Raw Materials

VOLATILE FATTY ACIDS FROM ORGANIC WASTES AS NOVEL LOW-COST CARBON SOURCE FOR Yarrowia lipolytica

2020 ◽  
Vol 56 ◽  
pp. 123-129 ◽  
Author(s):  
Mercedes Llamas ◽  
Elia Tomás-Pejó ◽  
Cristina González-Fernández
Keyword(s):  
Fatty Acids ◽  
Carbon Source ◽  
Yarrowia Lipolytica ◽  
Volatile Fatty Acids ◽  
Low Cost ◽  
Organic Wastes

scholarly journals The Potentiality of Municipal Solid Waste to Produce Volatile Fatty Acids (VFAs)

2019 ◽  
Vol 11 (1) ◽  
pp. 133-143
Author(s):  
M. S. A. Amin ◽  
M. M. Alam ◽  
M. S. I. Mozumder
Keyword(s):  
Fatty Acids ◽  
Anaerobic Digestion ◽  
Organic Waste ◽  
Volatile Fatty Acids ◽  
Batch Reactor ◽  
Ammonium Nitrogen ◽  
Economic Feasibility ◽  
Efficient Production ◽  
Inhibition Effect ◽  
Potato Waste

Volatile fatty acids (VFAs) are proposed platform molecules for the production of basic chemicals and polymers from organic waste streams. A simple bio-reactor was fabricated with locally available materials to conduct this study. A lab-scale anaerobic batch reactor was fed with potato waste and banana waste as substrate to find out the potential organic waste that has maximum VFAs production capacity. Between these two wastes, banana waste was found better for VFAs production. The product spectrum remained similar at the pH range 4.0-4.5 but higher pH reduced the VFAs production. The operation of anaerobic digestion with uncontrolled pH reduced the pH 4.0 to 4.5. Therefore, it is better to run the anaerobic digestion without controlling the pH while aiming to VFAs production. A small amount nutrient (ammonium nitrogen) significantly increases the VFAs production but higher amount nutrient has an inhibition effect. However commercial surfactant has a strong inhibition effect on VFAs producing organism and hence reduced the VFAs production. The efficient production of VFA at uncontrolled pH with a small amount of ammonium nitrogen increases the economic feasibility of organic waste-based VFAs production.

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