Upgrading the value of anaerobic fermentation via renewable chemicals production: A sustainable integration for circular bioeconomy

The plasmidless and markerless Escherichia coli succinate producing strain SGM2.0Pyc-int has been engineered and characterized. The strain has the inactivated main mixed-acid fermentation pathways due to the deletions of ldhA,poxB, ackA,pta, and adhE genes, constitutively expresses the genes of the aceEF-lpdA operon encoding components of pyravate dehydrogenase complex, and possesses the chromosomally integrated Bacillus subtilis pycA gene coding for pyruvate carboxylase. The capacity of the strain to synthesize succinic acid in course of dual-phase aerobic-anaerobic fermentation with lignocellulosic sugars as substrates was studied. The SGM2.0Pyc-int strain synthesized succinic acid from glucose, xylose, and arabinose with a molar yields of 1.41 mol/mol, 1.18 mol/mol, and 1.18 mol/mol, respectively, during the anaerobic production stage. The constructed strain has great potential for developing efficient processes for the succinic acid production from plant biomass-derived sugars. Escherichia coli, fermentation, arabinose, glucose, xylose, succinic acid. The work was supported by a Grant from the Russian Foundation for Basic Research (Project no. 18-29-14005).

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Effect of addition of anaerobic fermented OFMSW (organic fraction of municipal solid waste) on biological nutrient removal (BNR) process: preliminary results

Water Science & Technology ◽

10.2166/wst.1998.0078 ◽

1998 ◽

Vol 38 (1) ◽

pp. 327-334 ◽

Cited By ~ 7

Author(s):

P. Pavan ◽

P. Battistoni ◽

P. Traverso ◽

A. Musacco ◽

F. Cecchi

Keyword(s):

Nutrient Removal ◽

Fermentation Process ◽

Organic Waste ◽

Anaerobic Fermentation ◽

Pilot Scale ◽

Biological Nutrient Removal ◽

Organic Fraction ◽

P Release ◽

Pure Methanol ◽

P Removal

The paper presents results coming from experiments on pilot scale plants about the possibility to integrate the organic waste and wastewater treatment cycles, using the light organic fraction produced via anaerobic fermentation of OFMSW as RBCOD source for BNR processes. The effluent from the anaerobic fermentation process, with an average content of 20 g/l of VFA+ lactic acid was added to wastewater to be treated in order to increase RBCOD content of about 60-70 mg/l. The results obtained in the BNR process through the addition of the effluent from the fermentation unit are presented. Significant increase of denitrification rate was obtained: 0.06 KgN-NO3/KgVSS d were denitrified in the best operative conditions studied. -Vmax shows values close to those typical of the pure methanol addition (about 0.3 KgN-NO3/KgVSS d). A considerable P release (35%) was observed in the anaerobic step of the BNR process, even if not yet a completely developed P removal process.

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Recovery of bioplastics from municipal solids and food waste through an anaerobic fermentation platform

Proceedings of the Water Environment Federation ◽

10.2175/193864717822156262 ◽

2017 ◽

Vol 2017 (7) ◽

pp. 4310-4314

Author(s):

Eirene A Pavlakis ◽

Ramya Ahuja ◽

Shashwat Vajpeyi ◽

Kartik Chandran ◽

Wendell Khunjar ◽

...

Keyword(s):

Food Waste ◽

Anaerobic Fermentation

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Naive models as active expert system in bioengineering and chemical engineering

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19881476 ◽

1988 ◽

Vol 53 (7) ◽

pp. 1476-1499 ◽

Cited By ~ 12

Author(s):

Mirko Dohnal

Keyword(s):

Expert System ◽

Case Studies ◽

Chemical Engineering ◽

Anaerobic Fermentation ◽

Continuous Fermentation ◽

Point Of View ◽

Qualitative Variable ◽

Human Thinking

A possibility of qualitative variable utilization for description and evaluation of phenomena and processes from non-formal human thinking point of view is presented. Paper gives methods of naïve modelling and realistically assesses results that can be awaited. The method is demonstrated on two case studies that are given in full details, namely continuous fermentation (fermentor, two separators) and anaerobic fermentation.

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Recent Advances in Renewable Polymer Production from Lignin-Derived Aldehydes

Polymers ◽

10.3390/polym13030364 ◽

2021 ◽

Vol 13 (3) ◽

pp. 364

Author(s):

Nahyeon Lee ◽

Yong Tae Kim ◽

Jechan Lee

Keyword(s):

Lignocellulosic Biomass ◽

Aromatic Aldehydes ◽

Renewable Chemicals ◽

Platform Chemicals ◽

Recent Advances ◽

Promising Source

Lignin directly derived from lignocellulosic biomass has been named a promising source of platform chemicals for the production of bio-based polymers. This review discusses potentially relevant routes to produce renewable aromatic aldehydes (e.g., syringaldehyde and vanillin) from lignin feedstocks (pre-isolated lignin or lignocellulose) that are used to synthesize a range of bio-based polymers. To do this, the processes to make aromatic aldehydes from lignin with their highest available yields are first presented. After that, the routes from such aldehydes to different polymers are explored. Challenges and perspectives of the production the lignin-derived renewable chemicals and polymers are also highlighted.

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