Evaluation of nitrogen supplements for bioconversion of municipal solid waste to lactic acid

1996 ◽  
Vol 57-58 (1) ◽  
pp. 517-524 ◽  
Author(s):  
Sheng D. Zhou ◽  
Thomas A. McCaskey ◽  
Jacqueline Broder
Keyword(s):  
Lactic Acid ◽  
Municipal Solid Waste ◽  
Solid Waste

scholarly journals Simultaneous saccharification and lactic acid fermentation of the cellulosic fraction of municipal solid waste using Bacillus smithii

2020 ◽  
Author(s):  
Micaela G. Chacón ◽  
Christopher Ibenegbu ◽  
David J. Leak
Keyword(s):  
Lactic Acid ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Lactic Acid Production ◽  
Lactic Acid Fermentation ◽  
Potential Candidate ◽  
Acid Fermentation ◽  
Promising Candidate ◽  
Cellulosic Pulp ◽  
Simultaneous Saccharification

Abstract Objective A primary drawback to simultaneous saccharification and fermentation (SSF) processes is the incompatibility of the temperature and pH optima for the hydrolysis and fermentation steps—with the former working best at 50–55 °C and pH 4.5–5.5. Here, nine thermophilic Bacillus and Parageobacillus spp. were evaluated for growth and lactic acid fermentation at high temperature and low pH. The most promising candidate was then carried forward to demonstrate SSF using the cellulosic fraction from municipal solid waste (MSW) as a feedstock. Results B. smithii SA8Eth was identified as the most promising candidate and in a batch SSF maintained at 55 °C and pH 5.0, using a cellulase dose of 5 FPU/g glucan, it produced 5.1 g/L lactic acid from 2% (w/v) MSW cellulosic pulp in TSB media. Conclusion This work has both scientific and industrial relevance, as it evaluates a number of previously untrialled bacterial hosts for their compatibility with lignocellulosic SSF for lactic acid production and successfully identifies B. smithii as a potential candidate for such a process.

Bioconversion of municipal solid waste to lactic acid byLactobacillus species

1994 ◽  
Vol 45-46 (1) ◽  
pp. 555-568 ◽  
Author(s):  
Thomas A. McCaskey ◽  
Sheng D. Zhou ◽  
Sarah N. Britt ◽  
Richard Strickland
Keyword(s):  
Lactic Acid ◽  
Municipal Solid Waste ◽  
Solid Waste

scholarly journals Integration of Solid State and Submerged Fermentations for the Valorization of Organic Municipal Solid Waste

2021 ◽  
Vol 7 (9) ◽  
pp. 766
Author(s):  
Gheorghe-Adrian Martău ◽  
Peter Unger ◽  
Roland Schneider ◽  
Joachim Venus ◽  
Dan Cristian Vodnar ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Solid State ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bacillus Coagulans ◽  
Aspergillus Awamori ◽  
Organic Residues ◽  
Organic Fraction ◽  
Hydrolysis Of ◽  
Suitable Process

Solid state fermentation (SsF) is recognized as a suitable process for the production of enzymes using organic residues as substrates. However, only a few studies have integrated an evaluation of the feasibility of applying enzymes produced by SsF into subsequent hydrolyses followed by the production of target compounds, e.g., lactic acid (LA), through submerged-liquid fermentations (SmF). In this study, wheat bran (WB) was used as the substrate for the production of enzymes via SsF by Aspergillus awamori DSM No. 63272. Following optimization, cellulase and glucoamylase activities were 73.63 ± 5.47 FPU/gds and 107.10 ± 2.63 U/gdb after 7 days and 5 days of fermentation, respectively. Enzymes were then used for the hydrolysis of the organic fraction of municipal solid waste (OFMSW). During hydrolysis, glucose increased considerably with a final value of 19.77 ± 1.56 g/L. Subsequently, hydrolysates were fermented in SmF by Bacillus coagulans A166 increasing the LA concentration by 15.59 g/L. The data reported in this study provides an example of how SsF and SmF technologies can be combined for the valorization of WB and OFMSW.

scholarly journals Organic fraction of municipal solid waste for the production of L-lactic acid with high optical purity

2020 ◽  
Vol 247 ◽  
pp. 119165 ◽  
Author(s):  
José Pablo López-Gómez ◽  
Maria Alexandri ◽  
Roland Schneider ◽  
Marcos Latorre-Sánchez ◽  
Caterina Coll Lozano ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Optical Purity ◽  
Organic Fraction ◽  
High Optical Purity

scholarly journals Dechlorination of Municipal Solid Waste Incineration Fly Ash by Leaching with Fermentation Liquid of Food Waste

2020 ◽  
Vol 12 (11) ◽  
pp. 4389
Author(s):  
Dezhi Zou ◽  
Xiaona Wang ◽  
Chuanfu Wu ◽  
Teng Li ◽  
Menglu Wang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Fly Ash ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Food Waste ◽  
Pure Water ◽  
Waste Incineration ◽  
Cement Kiln ◽  
Municipal Solid Waste Incineration ◽  
Fermentation Liquid

Cement kiln collaborative disposal of municipal solid waste incineration (MSWI) fly ash (referred to as fly ash) can achieve harmless recycling of fly ash. However, because of high chlorine (Cl) content in fly ash, the practical application of this technology is seriously restricted. In order to find a suitable leaching solvent for dechlorination of fly ash, this study compared the effect of lactic acid fermentation liquid (FL) and sludge FL of food waste on dechlorination. Results show that 90% of water-insoluble Cl in fly ash can be removed by a three-step leaching process with lactic acid FL and sludge FL, and the Cl content in leached fly ash residue is 0.44% and 0.39%, respectively. According to calculation, permissible fraction of the residue after three-step leaching with addition of lactic acid FL and sludge FL in kiln is 4.28% and 4.99% higher than that of the residue after three-step leaching with pure water, respectively. Furthermore, the properties of leaching solvents after leaching experiments indicate that organic acids with low pH value and high concentration are more conducive for removal of water-insoluble Cl. Therefore, it is feasible to use two kinds of FL as leaching solvent for fly ash dechlorination.

Accumulation of Lactic Acid during Biodigestion of Municipal Solid Waste Leachate and Identification of Indigenous Lactic Acid Bacteria in Leachate

2014 ◽  
Vol 18 (4) ◽  
pp. 04014021 ◽  
Author(s):  
Shailendra Yadav ◽  
S. S. Maitra ◽  
Shukla Pal ◽  
Neha Singh ◽  
S. K. Gupta ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Waste Leachate
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