Making Plastics from Garbage

Sakai, Kenji; Taniguchi, Masayuki; Miura, Shigenobu; Ohara, Hirotaka; Matsumoto, Toru; Shirai, Yoshihito

doi:10.1162/108819803323059406

Cited by 86 publications

(27 citation statements)

References 27 publications

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“…Moreover, mixed cultures fermentation have shown in numerous cases to be more robust compared to mono-culture fermentations (John et al, 2006;Nancib et al, 2009;Cui et al, 2011). Similar outcome was also concluded in with previous study using food waste in combined fermentation and chemical processes to produce highquality poly-L-lactate (Sakai et al, 2004). Since autoclavation is an energy intensive and a costly process, its usage at industrial scale is hardly economically feasible (Li et al, 2014;Pleissner et al, 2017).…”

Section: Effect Of Autoclavationsupporting

confidence: 76%

Fermentative Production of Lactic Acid as a Sustainable Approach to Valorize Household Bio-Waste

et al. 2020

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Source-sorted organic portion of municipal solid waste (bio-waste) can be fermented to lactic acid, a platform chemical widely used in the production of biodegradable polymers, green solvents, and chemicals. In the present study, fermentation of bio-waste using lactic acid producing bacterium (LAB) Lactobacillus delbrueckii was investigated. Results showed that adding 10% (v/v) of L. delbrueckii as LAB inoculum along with pH adjustment to 6.2 had the highest lactic acid yield (0.65 g/g total sugars). Nevertheless, pH adjustment without bio-augmentation could also result in relatively high yield of lactic acid (0.57 g/g total sugars). Furthermore, enzymatic hydrolysis was applied to boost the lactic acid production slightly increasing the yield to 0.72 g/g total sugars. Thus, fermentative production of lactic acid can be achieved without the addition of enzymes to reduce production costs. Overall, the results indicate that bio-waste could be a suitable substrate for the production of lactic acid.

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Section: Effect Of Autoclavationsupporting

confidence: 76%

Fermentative Production of Lactic Acid as a Sustainable Approach to Valorize Household Bio-Waste

et al. 2020

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“…In this study, we successfully conducted a commercial upstream processing of LA fermentation from FW. 34 However, we suggest further improvement of our highest obtained LA concentration (33.50 g L -1 ) to reduce the high cost of downstream processing in the future. Lactic acid has two optical isomers, L-LA and D-LA, because LAB contain L-LA dehydrogenase or D-LA dehydrogenase; most LAB have only one dehydrogenase.…”

Section: Pilot-scale Fermentation Of Fw With L-lab Inoculationmentioning

confidence: 84%

A newly isolated strain, Lactobacillus paracasei subsp. paracasei 2, produces l‐lactic acid from pilot‐scale fermentation of food waste under sterile and nonsterile conditions

Gao

Song

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: Lactic acid (LA) is a valuable industrial chemical with wide applications. Presently, the demand for optically pure L-LA has grown considerably as a result of its applications in the food and pharmaceutical industries, and biodegradable polylactic acid production. The production of L-LA from food waste (FW) has been discussed in some studies; however, most fermentation is performed under sterile conditions and with the addition of specific lactic acid bacteria. Completely autoclaving organic solid wastes is difficult and economically unfeasible. The aim of this work was to investigate pilot-scale LA production from FW under sterile and nonsterile conditions. RESULTS: When FW was fermented without sterilization and inoculation, the maximum yield of LA was 0.43 g LA g-1 total solid (TS) and the proportion of L-LA was only ≈50%. A newly isolated strain, Lactobacillus paracasei subsp. paracasei 2, which was isolated and identified from FW, was used to improve the proportion of L-LA in total LA. When nonsterile FW was inoculated with this strain, the proportion of L-LA increased to 72.3%. After FW was sterilized and inoculated with this strain, the proportion of L-LA was 98.6% and 98.8% under intermittent and real-time regulation of pH level, respectively. The maximum LA yield could increase to 0.55 g LA g-1 TS. CONCLUSION: Pilot-scale LA production from FW was determined by comparing the isomer purity of L-LA between sterilization and nonsterilization and between inoculation and noninoculation, which provided an important strain and fermentation type for production of high concentration of L-LA.

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“…(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42)(43)23,44)). With respect to biochemical conversion (hydrolysis + fermentation), these studies indicate that, by optimizing BMSW pre-treatment and hydrolysis procedures, more than 85% of the waste cellulose fraction can be converted into glucose (36) which could be converted to fermentation products such as ethanol and other platform chemicals.…”

Section: Msw Feedstock Quality Issuesmentioning

confidence: 99%