1
|
Yang L, Chen L, Zhao C, Li H, Cai J, Deng Z, Liu M. Biogas slurry recirculation regulates food waste fermentation: Effects and mechanisms. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 347:119101. [PMID: 37748298 DOI: 10.1016/j.jenvman.2023.119101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/09/2023] [Accepted: 09/19/2023] [Indexed: 09/27/2023]
Abstract
Regularly adding biogas slurry into fermentation reactors is an effective way to enhance hydrogen or methane production. However, how this method affects the production of valuable organic acids and alcohols is still being determined. This study investigated the effects of different addition ratios on semi-continuous fermentation reactors using food waste as a substrate. The results showed that an addition ratio of 0.2 increased lactic acid production by 30% with a yield of 0.38 ± 0.01 g/g VS, while a ratio of 0.4 resulted in mixed acid fermentation dominated by n-butyric acid (0.07 ± 0.01 g/g VS) and n-caproic acid (0.06 ± 0.00 g/g VS). The introduction of Bifidobacteriaceae by biogas slurry played a crucial role in increasing lactic acid production. In contrast, exclusive medium-chain fatty acid producers enhanced the synthesis of caproic acid and heptanoic acid via the reverse β-oxidation pathway. Mechanism analyses suggested that microbial community structure and activity, substrate hydrolysis, and cell membrane transport system and structure changed to varying degrees after adding biogas slurry.
Collapse
Affiliation(s)
- Luxin Yang
- Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Liang Chen
- Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Chuyun Zhao
- Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Huan Li
- Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Jiabai Cai
- Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China; Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Katsura C-1-3, 615-8540, Kyoto, Japan
| | - Zhou Deng
- Shenzhen Lisai Environmental Technology Co. Ltm., Shenzhen, 518055, China
| | - Mengqian Liu
- Shenzhen Originwater Ecological Investment Construction Co., LTD, China
| |
Collapse
|
2
|
Guo Y, Zhao Y, Gao Y, Wang G, Zhao Y, Zhang J, Li Y, Wang X, Liu J, Chen G. Low acyl gellan gum immobilized Lactobacillus bulgaricus T15 produce D-lactic acid from non-detoxified corn stover hydrolysate. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2023; 16:43. [PMID: 36915198 PMCID: PMC10009946 DOI: 10.1186/s13068-023-02292-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 02/28/2023] [Indexed: 03/16/2023]
Abstract
Straw biorefinery offers economical and sustainable production of chemicals. The merits of cell immobilization technology have become the key technology to meet D-lactic acid production from non- detoxified corn stover. In this paper, Low acyl gellan gum (LA-GAGR) was employed first time for Lactobacillus bulgaricus T15 immobilization and applied in D-lactic acid (D-LA) production from non-detoxified corn stover hydrolysate. Compared with the conventional calcium alginate (E404), LA-GAGR has a hencky stress of 82.09 kPa and excellent tolerance to 5-hydroxymethylfurfural (5-HMF), ferulic acid (FA), and vanillin. These features make LA-GAGR immobilized T15 work for 50 days via cell-recycle fermentation with D-LA yield of 2.77 ± 0.27 g/L h, while E404 immobilized T15 can only work for 30 days. The production of D-LA from non-detoxified corn stover hydrolysate with LA-GAGR immobilized T15 was also higher than that of free T15 fermentation and E404 immobilized T15 fermentation. In conclusion, LA-GAGR is an excellent cell immobilization material with great potential for industrial application in straw biorefinery industry.
Collapse
Affiliation(s)
- Yongxin Guo
- College of Life Science, Jilin Agricultural University, Jilin, 130118, China
| | - Yuru Zhao
- College of Life Science, Jilin Agricultural University, Jilin, 130118, China
| | - Yuan Gao
- College of Life Science, Jilin Agricultural University, Jilin, 130118, China.,Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Jilin, 130118, China.,College of Food Science Technology and Chemical Engineering, Hubei University of Arts and Science, Hubei, 430000, China.,Sericultural Research Institute of Jilin Province, Jilin, China
| | - Gang Wang
- College of Life Science, Jilin Agricultural University, Jilin, 130118, China. .,Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Jilin, 130118, China.
| | - Yixin Zhao
- College of Life Science, Jilin Agricultural University, Jilin, 130118, China
| | - Jiejing Zhang
- College of Life Science, Jilin Agricultural University, Jilin, 130118, China
| | - Yanli Li
- College of Life Science, Jilin Agricultural University, Jilin, 130118, China
| | - Xiqing Wang
- College of Food Science Technology and Chemical Engineering, Hubei University of Arts and Science, Hubei, 430000, China
| | - Juan Liu
- Sericultural Research Institute of Jilin Province, Jilin, China
| | - Guang Chen
- College of Life Science, Jilin Agricultural University, Jilin, 130118, China.,Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Jilin, 130118, China
| |
Collapse
|
3
|
Chenebault C, Moscoviz R, Trably E, Escudié R, Percheron B. Lactic acid production from food waste using a microbial consortium: Focus on key parameters for process upscaling and fermentation residues valorization. BIORESOURCE TECHNOLOGY 2022; 354:127230. [PMID: 35483530 DOI: 10.1016/j.biortech.2022.127230] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/21/2022] [Accepted: 04/22/2022] [Indexed: 06/14/2023]
Abstract
In this study, the production of lactic acid from food waste in industrially relevant conditions was investigated. Laboratory assays were first performed in batch conditions to determine the suitable operational parameters for an efficient lactic acid production. The use of compost as inoculum, the regulation of temperature at 35 °C and pH at 5 enhanced the development of Lactobacillus sp. resulting in the production of 70 g/L of lactic acid with a selectivity of 89% over the other carboxylic acids. Those parameters were then applied at pilot scale in successive fed-batch fermentations. The subsequent high concentration (68 g/L), yield (0.38 g/gTS) and selectivity (77%) in lactic acid demonstrated the applicability of the process. To integrate the process into a complete value chain, fermentation residues were then converted into biogas through anaerobic digestion. Lastly, the experiment was successfully replicated using commercial and municipal waste collected in France.
Collapse
Affiliation(s)
| | - Roman Moscoviz
- Suez, CIRSEE, 38 rue du Président Wilson, 78230 Le Pecq, France
| | - Eric Trably
- LBE, INRAE, Univ Montpellier, 102 Avenue des Etangs, Narbonne F-11100, France
| | - Renaud Escudié
- LBE, INRAE, Univ Montpellier, 102 Avenue des Etangs, Narbonne F-11100, France
| | | |
Collapse
|
4
|
Ma X, Gao M, Liu S, Li Y, Sun X, Wang Q. An innovative approach for reducing the water and alkali consumption in the lactic acid fermentation via the reuse of pretreated liquid. BIORESOURCE TECHNOLOGY 2022; 352:127108. [PMID: 35381334 DOI: 10.1016/j.biortech.2022.127108] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 06/14/2023]
Abstract
This study focuses on enhancing lactic acid (LA) production and declining water and alkali consumption by reusing the pretreated liquid (PL) of spent mushroom substance (SMS) in the co-fermentation of food waste (FW) and SMS. First, the compositions of PL are identified, and the effects of the PL inhibitors on enzymatic hydrolysis and fermentation are explored. The PL phenol concentrations exceeded 2 g/L, which affected LA fermentation. Therefore, PL phenols were removed by adjusting the pH value, and the detoxified PL (DPL) phenol concentrations were 70.3% lower than those of PL. Different PL:DPL ratios were established to reuse in the fermentation process, and the LA concentration in the 50% PL + 50% DPL group was the highest (56.7 g/L). Then, pretreated SMS was not water-washed, and a neutralizer was prepared with the PL, LA production remained unchanged. Water and NaOH consumption decreased by 84.6% and 52.0%, respectively, and no wastewater was produced.
Collapse
Affiliation(s)
- Xiaoyu Ma
- Department of Environmental Science and Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
| | - Ming Gao
- Department of Environmental Science and Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
| | - Shuo Liu
- Department of Environmental Science and Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
| | - Yuan Li
- Department of Environmental Science and Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
| | - Xiaohong Sun
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Qunhui Wang
- Department of Environmental Science and Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China; Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China.
| |
Collapse
|
5
|
Yang L, Chen L, Li H, Deng Z, Liu J. Lactic acid production from mesophilic and thermophilic fermentation of food waste at different pH. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 304:114312. [PMID: 34942551 DOI: 10.1016/j.jenvman.2021.114312] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 11/19/2021] [Accepted: 12/13/2021] [Indexed: 06/14/2023]
Abstract
It is promising to recover lactic acid (LA) from fermentation of food waste (FW). In this study, pH and temperatures were investigated comprehensively to find their effects on LA fermentation, and microbial analyses were used to take insight to the variation of LA production. The results showed that mesophilic fermentation benefited hydrolysis and acidification, leading to a high yield of LA, while thermophilic conditions restricted other producers at low pH, leading to a high purity of LA. Lactobacillus amylolyticus was the main LA producer under thermophilic conditions, but Thermoanaerobacterium thermosaccharolyticum boomed at pH 5.0-6.0 and it converted LA partly to butyric acid. Simultaneously, Bacillus coagulans also increased and improved the optical purity (OP) of L-LA. From a series of this study, an operational condition of pH 5.5 and temperature of 52 °C would be potentially suitable for lactate fermentation of FW with high purity of 89%, while a stable LA production with an OP of 68% was achieved at 55 °C and pH 6.0.
Collapse
Affiliation(s)
- Luxin Yang
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Liang Chen
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Huan Li
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Zhou Deng
- Shenzhen Lisai Environmental Technology Co, Ltd., Shenzhen, 518055, China
| | - Jianguo Liu
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China; School of Environment, Tsinghua University, Beijing, 100084, China
| |
Collapse
|
6
|
Song L, Yang D, Liu R, Liu S, Dai L, Dai X. Microbial production of lactic acid from food waste: Latest advances, limits, and perspectives. BIORESOURCE TECHNOLOGY 2022; 345:126052. [PMID: 34592459 DOI: 10.1016/j.biortech.2021.126052] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/24/2021] [Accepted: 09/25/2021] [Indexed: 06/13/2023]
Abstract
A significant amount of food waste (FW) is produced every year. If it is not disposed of timeously, human health and the ecological environment can be negatively affected. Lactic acid (LA), a high value-added product, can be produced by fermentation from FW as a substrate, realizing the concurrent treatment and recycling of FW, which has attracted increasing research interest. In this paper, the latest advances and deficiencies were presented from the following aspects: microorganisms involved in LA fermentation and the metabolic pathways of Lactobacillus, fermentation conditions, and methods of enhanced biotransformation and LA separation. The limitations of the LA fermentation of FW are mainly associated with low LA concentration and yield, the low purity of L(+)-LA, and the high separation costs. The establishment of biorefineries of FW with lactic acid as the target product is the future development direction, but there are still many research studies to be done.
Collapse
Affiliation(s)
- Liang Song
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Donghai Yang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Rui Liu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Shiyu Liu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Lingling Dai
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Xiaohu Dai
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
| |
Collapse
|