Salinity enhances high optically active L-lactate production from co-fermentation of food waste and waste activated sludge: Unveiling the response of microbial community shift and functional profiling

Li, Xiang; Sadiq, Safeena; Zhang, Wenjuan; Chen, Yiren; Xu, Xianbao; Abbas, Anees; Chen, Shanping; Zhang, Ruina; Xue, Gang; Sobotka, Dominika; Mąkinia, Jacek

doi:10.1016/j.biortech.2020.124124

Cited by 31 publications

(12 citation statements)

References 41 publications

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“…and Lactobacillus sp. The study showed a LA productivity of 0.61 g/L/h and an achieved LA concentration of 30 g/L (Li et al, 2021b), which are similar to the results achieved on the lignocellulosic residues (Table 3) as explained due to similar fermentable sugars such as glucose and xylose achieved during the hydrolysis step.…”

Section: Food Waste Containing Starch and Pectinsupporting

confidence: 84%

“…The bakery waste batch fermentation resulted in a higher LA productivity of 2.4 g/L/h with Bacillus coagulans as fermenting strain with a titer of 62 g/L (Alexandri et al, 2020) compared with potato/apple derived starch (Li et al, 2021b;Lian et al, 2020). When lucerne green juice hydrolysate was added replacing yeast extract a 6 h lag phase took place but no significant change occurred in the LA titer demonstrating that it was useful as nitrogen supplement.…”

Section: Food Waste Containing Starch and Pectinmentioning

confidence: 98%

“…These enzymes were produced in a mixed culture approach studied by Li et al (2021b). However, for bread derived starch, enzymes were added including Ban 240l (endo-α-amylase) and Stargen™ 002 and Viscozyme for cellulose hydrolysis due to the lignocellulose content in the lucerne green juice (Alexandri et al, 2020).…”

Section: Food Waste Containing Starch and Pectinmentioning

confidence: 99%

See 2 more Smart Citations

Valorization of municipal organic waste into purified lactic acid

Thygesen

Tsapekos

Alvarado-Morales

et al. 2021

Bioresource Technology

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Section: Food Waste Containing Starch and Pectinsupporting

confidence: 84%

Section: Food Waste Containing Starch and Pectinmentioning

confidence: 98%

Section: Food Waste Containing Starch and Pectinmentioning

confidence: 99%

See 1 more Smart Citation

Valorization of municipal organic waste into purified lactic acid

Thygesen

Tsapekos

Alvarado-Morales

et al. 2021

Bioresource Technology

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“…Comparing the results obtained in experiment II with the work of Li et al [35], which studied the co-fermentation of FW and waste activated sludge (WAS) under similar conditions to those tested in experiment II (Table 3); the yield of acidification was much lower (estimated in 31%) than the ones obtained in BSR-7 (46%) and in PBSR-7 (41%). Moreover, regarding VFA concentration, Li et al [35] obtained ~12 g L −1 in COD, while ~20 g L −1 was obtained in both reactors in experiment II.…”

Section: Discussionsupporting

confidence: 54%

Volatile Fatty Acids (VFA) Production from Wastewaters with High Salinity—Influence of pH, Salinity and Reactor Configuration

et al. 2021

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The hydrocarbon-based economy is moving at a large pace to a decarbonized sustainable bioeconomy based on biorefining all types of secondary carbohydrate-based raw materials. In this work, 50 g L−1 in COD of a mixture of food waste, brine and wastewater derived from a biodiesel production facility were used to produce organic acids, important building-blocks for a biobased industry. High salinity (12–18 g L−1), different reactors configuration operated in batch mode, and different initial pH were tested. In experiment I, a batch stirred reactor (BSR) at atmospheric pressure and a granular sludge bed column (GSBC) were tested with an initial pH of 5. In the end of the experiment, the acidification yield (ηa) was similar in both reactors (22–24%, w/w); nevertheless, lactic acid was in lower concentrations in BSR (6.3 g L−1 in COD), when compared to GSBC (8.0 g L−1 in COD), and valeric was the dominant acid, reaching 17.3% (w/w) in the BSR. In experiment II, the BSR and a pressurized batch stirred reactor (PBSR, operated at 6 bar) were tested with initial pH 7. The ηa and the VFA concentration were higher in the BSR (46%, 22.8 g L−1 in COD) than in the PBSR (41%, 20.3 g/L in COD), and longer chain acids were more predominant in BSR (24.4% butyric, 6.7% valeric, and 6.2% caproic acids) than in PBSR (23.2%, 6.2%, and 4.2%, respectively). The results show that initial pH of 7 allows achieving higher ηa, and the BSR presents the most suitable reactor among tested configurations to produce VFA from wastes/wastewaters with high salinity.

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“…The reason for the enhanced optical purity of L-lactic acid is perhaps that the activity of D-lactic acid producing enzymes are sensitive to high concentration of salt. Furthermore, high salt concentration resulted in the changes of microbial community and decreased diversity of indigenous microbiota [34,51].…”

Section: Food Wastementioning

confidence: 99%

A Review of the Recent Developments in the Bioproduction of Polylactic Acid and Its Precursors Optically Pure Lactic Acids

Huang

Xue

et al. 2021

Molecules

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Lactic acid (LA) is an important organic acid with broad industrial applications. Considered as an environmentally friendly alternative to petroleum-based plastic with a wide range of applications, polylactic acid has generated a great deal of interest and therefore the demand for optically pure l- or d-lactic acid has increased accordingly. Microbial fermentation is the industrial route for LA production. LA bacteria and certain genetic engineering bacteria are widely used for LA production. Although some fungi, such as Saccharomyces cerevisiae, are not natural LA producers, they have recently received increased attention for LA production because of their acid tolerance. The main challenge for LA bioproduction is the high cost of substrates. The development of LA production from cost-effective biomasses is a potential solution to reduce the cost of LA production. This review examined and discussed recent progress in optically pure l-lactic acid and optically pure d-lactic acid fermentation. The utilization of inexpensive substrates is also focused on. Additionally, for PLA production, a complete biological process by one-step fermentation from renewable resources is also currently being developed by metabolically engineered bacteria. We also summarize the strategies and procedures for metabolically engineering microorganisms producing PLA. In addition, there exists some challenges to efficiently produce PLA, therefore strategies to overcome these challenges through metabolic engineering combined with enzyme engineering are also discussed.

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Salinity enhances high optically active L-lactate production from co-fermentation of food waste and waste activated sludge: Unveiling the response of microbial community shift and functional profiling

Cited by 31 publications

References 41 publications

Valorization of municipal organic waste into purified lactic acid

Valorization of municipal organic waste into purified lactic acid

Volatile Fatty Acids (VFA) Production from Wastewaters with High Salinity—Influence of pH, Salinity and Reactor Configuration

A Review of the Recent Developments in the Bioproduction of Polylactic Acid and Its Precursors Optically Pure Lactic Acids

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