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Joslin GR, Barber DG, Aston L, Liu P, Kuloyo O, Oentoro K, Liu J, Baugh AV, Fedenko JR, Melas I, Hamilton PG, Allen DJ, Tennant RK. Metagenomic analysis of ethylene glycol contamination in anaerobic digestion. BIORESOURCE TECHNOLOGY 2023; 387:129683. [PMID: 37597572 DOI: 10.1016/j.biortech.2023.129683] [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: 06/13/2023] [Revised: 08/11/2023] [Accepted: 08/12/2023] [Indexed: 08/21/2023]
Abstract
Anaerobic digestion is an established method for the biological conversion of waste feedstocks to biogas and biomethane. While anaerobic digestion is an excellent waste management technique, it can be susceptible to toxins and pollutants from contaminated feedstocks, which may have a detrimental impact on a digester's efficiency and productivity. Ethylene glycol (EG) is readily used in the heat-transfer loops of anaerobic digestion facilities to maintain reactor temperature. Failure of the structural integrity of these heat transfer loops can cause EG to leak into the digester, potentially causing a decrease in the resultant gas yields. Batch fermentations were incubated with 0, 10, 100 and 500 ppm (parts per million) of EG, and analysis showed that the EG was completely metabolised by the digester microbiome. The concentrations of EG tested showed significant increases in gas yields, however there were no significant changes to the digester microbiome.
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Affiliation(s)
- Gabrielle R Joslin
- Geography, University of Exeter, Faculty of Environment, Science and Economy, Amory Building, Rennes Drive, Exeter, Devon EX4 4RJ, UK.
| | - Daniel G Barber
- Geography, University of Exeter, Faculty of Environment, Science and Economy, Amory Building, Rennes Drive, Exeter, Devon EX4 4RJ, UK.
| | - Lindsay Aston
- Shell International Exploration and Production, 3333 Highway 6 South, Houston, TX 77082, USA.
| | - Ping Liu
- Shell International Exploration and Production, 3333 Highway 6 South, Houston, TX 77082, USA.
| | - Olukayode Kuloyo
- Shell International Exploration and Production, 3333 Highway 6 South, Houston, TX 77082, USA.
| | - Kangsa Oentoro
- Shell International Exploration and Production, 3333 Highway 6 South, Houston, TX 77082, USA.
| | - Jiayi Liu
- Shell International Exploration and Production, 3333 Highway 6 South, Houston, TX 77082, USA.
| | - Ashley V Baugh
- Shell International Exploration and Production, 3333 Highway 6 South, Houston, TX 77082, USA.
| | - Jeffrey R Fedenko
- Equilon Enterprises LLC, 150 N Dairy Ashford Road, Houston, TX 77079, USA.
| | - Ioannis Melas
- Shell Research Limited, Shell Centre, London SE1 7PB, UK.
| | - Phillip G Hamilton
- Shell International Exploration and Production, 3333 Highway 6 South, Houston, TX 77082, USA.
| | - Damian J Allen
- Shell International Exploration and Production, 3333 Highway 6 South, Houston, TX 77082, USA.
| | - Richard K Tennant
- Geography, University of Exeter, Faculty of Environment, Science and Economy, Amory Building, Rennes Drive, Exeter, Devon EX4 4RJ, UK.
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Liu W, Song X, Ding X, Xia R, Lin X, Li G, Nghiem LD, Luo W. Antibiotic removal from swine farming wastewater by anaerobic membrane bioreactor: Role of hydraulic retention time. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2023.121629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
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Wang K, Xiong B, Zhao X. Could propionate formation be used to reduce enteric methane emission in ruminants? THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 855:158867. [PMID: 36122712 DOI: 10.1016/j.scitotenv.2022.158867] [Citation(s) in RCA: 29] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 09/11/2022] [Accepted: 09/15/2022] [Indexed: 06/15/2023]
Abstract
To meet the increasing demand for meat and milk, the livestock industry has to increase its production. Without improving its efficiency, increased livestock, especially ruminant animals, will worsen the environmental damage, mainly from enteric CH4 emission. Enteric CH4 emission from ruminants not only exacerbates the global greenhouse effect but also reduces feed energy efficiency for the animals. The rumen disposes of metabolic hydrogen ([H]) primarily through methanogenesis and propionate formation. Theoretically, redirecting [H] from methanogenesis to propionate formation to reduce CH4 production could be a promising method for reducing greenhouse gas emission from ruminants, and may also increase animal productivity. However, the feasibility of such a shifting has never been synthetically discussed. Thus, the objectives of this review are to provide a brief overview of the biochemical pathways for disposal of H2 in the rumen, to analyze current feeding strategies that potentially promote propionate formation and their effects on methanogenesis, and to deliberate the challenge and opportunity associated with propionate formation as a sink to store the [H] shifting from enteric CH4 inhibition.
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Affiliation(s)
- Kun Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, Quebec H9X 3V9, Canada
| | - Benhai Xiong
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Xin Zhao
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, Quebec H9X 3V9, Canada.
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Liu Z, Wang K, Nan X, Yang L, Wang Y, Zhang F, Cai M, Zhao Y, Xiong B. Effects of combined addition of 3-nitrooxypropanol and vitamin B12 on methane and propionate production in dairy cows by in vitro-simulated fermentation. J Dairy Sci 2022; 106:219-232. [DOI: 10.3168/jds.2022-22207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 08/13/2022] [Indexed: 11/09/2022]
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Liu W, Xia R, Ding X, Cui W, Li T, Li G, Luo W. Impacts of nano-zero-valent iron on antibiotic removal by anaerobic membrane bioreactor for swine wastewater treatment. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Responses of Fermentation Characteristics and Microbial Communities to Vitamin B12 Supplementation in In Vitro Ruminal Cultures. FERMENTATION 2022. [DOI: 10.3390/fermentation8080406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Vitamin B12, an important cofactor involved in propionate formation, is synthesized exclusively by bacteria and archaebacteria. Humans need to intake vitamin B12 through food, and dairy products are generally the best source of vitamin B12. In the present study, the effects of vitamin B12 supplementation in diets on in vitro ruminal fermentation characteristics and microbial communities were investigated to provide a reference for increasing the vitamin B12 content in milk by dietary supplementation. A completely randomized design was carried out using the in vitro rumen culture technique, and 5 vitamin B12 dose levels (0, 0.5, 1.0, 2.0, and 4 mg/g of dry matter) were used. The results showed that vitamin B12 supplementation in diets decreased acetate: propionate ratio and butyrate concentration. The change in the acetate: propionate ratio can be attributed to the increased relative abundances of the Proteobacteria phylum and the Negativicutes class, both of which are involved in propionate metabolism. The decrease in butyrate concentration can likely be attributed to a reduction in relative abundance of species belonging to the Clostridia class, which are known as the predominant butyrate producers in the mammalian intestine. In addition, vitamin B12 supplementation in diets reduced the CH4 production by altering the species composition of the archaeal community. In conclusion, dietary supplementation of vitamin B12 resulted in rumen perturbation. In vivo studies should be conducted cautiously when evaluating the effects of vitamin B12 supplementation on the synthesis and absorption of it, as well as its content in milk.
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Xiang K, Li S, Tuniyazi M, Mu R, Wang Y, Zhang N, Hu X, Fu Y. Changes in the rumen microbiota community in ketosis cows during propylene glycol treatment. Food Funct 2022; 13:7144-7156. [PMID: 35699056 DOI: 10.1039/d1fo03800a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ketosis, a common metabolic disorder in dairy cattle, occurs during early lactation and leads to higher concentrations of non-esterified fatty acids (NEFAs) and β-hydroxybutyrate (BHBA), and is generally believed to be caused by excessive negative energy balance (NEB). Propylene glycol (PG), a gluconeogenic precursor, has been proved to promote gluconeogenesis and alleviate NEB. Oral administration of PG is widely considered one of the most effective therapeutic options for treating ketosis. Thus, in this study, we assessed the effects of PG on rumen microbiota via 16S rDNA analysis. The results show that one dose (500 mL) of PG treatment could rapidly reduce the blood BHBA level in ketosis cows by increasing the level and proportion of propionate in the rumen. Meanwhile, PG also had certain effects on the rumen bacterial community. Compared with before treatment, the relative abundances of Prevotella, Succinivibrionaceae_UCG-001 and Prevotellaceae_UCG-001 increased significantly, while those of Christensenellaceae_R-7_group, Butyrivibrio and Saccharofermentans significantly decreased. LEfSe analysis revealed that after PG treatment, only Rikenellaceae_RC9_gut_group was enriched in the rumen fluid at the genus level. In conclusion, the present study indicates that ketosis is accompanied by alterations in the rumen microbiota community. PG treatment changes the composition of rumen microbiota to a healthier state and contributes to rapid recovery from ketosis. These results support the usage of PG for treating such metabolic diseases that challenge high-yield cows due to their minimized cost and maximized safety without any adverse events.
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Affiliation(s)
- Kaihe Xiang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province 130062, People's Republic of China. .,Department of Veterinary Medicine, College of Agriculture, Eastern Liaoning University, Dandong, Liaoning Province 118000, People's Republic of China
| | - Shuang Li
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province 130062, People's Republic of China.
| | - Maimaiti Tuniyazi
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province 130062, People's Republic of China.
| | | | - Ying Wang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province 130062, People's Republic of China.
| | - Naisheng Zhang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province 130062, People's Republic of China.
| | - Xiaoyu Hu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province 130062, People's Republic of China.
| | - Yunhe Fu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province 130062, People's Republic of China.
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Zhang F, Wang Y, Wang H, Nan X, Guo Y, Xiong B. Calcium Propionate Supplementation Has Minor Effects on Major Ruminal Bacterial Community Composition of Early Lactation Dairy Cows. Front Microbiol 2022; 13:847488. [PMID: 35369461 PMCID: PMC8964349 DOI: 10.3389/fmicb.2022.847488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Accepted: 02/08/2022] [Indexed: 11/13/2022] Open
Abstract
Calcium propionate is one kind of good source for preventing and treating hypocalcemia and ketosis for dairy cows in early lactation. However, little is known about the effects of different feeding levels of calcium propionate on the ruminal bacterial community of early lactation dairy cows. This study aimed to explore the effects of different calcium propionate feeding levels on the ruminal fermentation and bacterial community composition of early lactation dairy cows. Twenty-four multiparous cows were randomly allocated into control (CON), low calcium propionate (LCaP), medium calcium propionate (MCaP), and high calcium propionate (HCaP) groups with six cows per group after calving. The CON group cows were fed the normal total mixed ration (TMR), and the cows of the LCaP, MCaP, and HCaP groups were fed TMR supplemented with 200, 350, and 500 g/day calcium propionate for 35 days after calving, respectively. The rumen fermentation parameters were measured every week, and the ruminal bacterial community composition of the last week was analyzed by 16S rRNA gene sequencing. Under the same diet, the rumen pH showed no difference among the four groups, but the content of microbial crude protein (MCP) and ammonia nitrogen quadratically decreased and linearly increased with calcium propionate supplementation, respectively. The feeding of calcium propionate linearly increased the concentrations of total volatile fatty acid (VFA), acetate, propionate, butyrate, iso-valerate, and valerate in the rumen. In all the treatment groups, Bacteroidetes, Firmicutes, and Proteobacteria were the dominant phyla, and Prevotella_1 and Succiniclasticum were the dominant genera in the rumen. Compared with the CON group, the addition of calcium propionate to the early lactation dairy cows quadratically improved the alpha diversity index of Chao1 estimator and observed species, but had little effect on the relative abundance of the major bacterial at phyla and genera level. These results suggested different levels of calcium propionate supplementation improved the rumen fermentation and the ruminal bacterial diversity but had little impact on the major ruminal bacterial community composition of dairy cows in early lactation.
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Affiliation(s)
- Fan Zhang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China.,State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yue Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Hui Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xuemei Nan
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yuming Guo
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Benhai Xiong
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
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Synergistic effects of 3-nitrooxypropanol with fumarate in the regulation of propionate formation and methanogenesis in dairy cows in vitro. Appl Environ Microbiol 2022; 88:e0190821. [PMID: 35080908 DOI: 10.1128/aem.01908-21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
3-nitrooxypropanol (3-NOP) is effective in reducing ruminal methane emission in ruminants. But it also causes a drastic increase in hydrogen accumulation, resulting in a feed energy waste. Fumarate is a key precursor for propionate formation and plays an important role in rumen hydrogen metabolism. Therefore, this study examined the effects of 3-NOP combined with fumarate on volatile fatty acids, methanogenesis and microbial community structures in dairy cows in vitro . The in vitro culture experiment was performed using a 2 × 2 factorial design: two 3-NOP levels (0 or 2 mg/g DM) and two fumarate levels (0 or 100 mg/g DM), including 3 runs × 4 treatments × 4 replicates and 4 blanks only containing inoculum. Rumen fluid was collected from three lactating Holstein cows with permanent ruminal fistulas. The combination of 3-NOP and fumarate reduced methane emission by 11.48% without affecting dry matter degradebility. Propionate concentration increased and acetate/propionate ratio decreased significantly. In terms of bacteria, the combination of 3-NOP and fumarate reduced the abundance of Ruminococcus and Lachnospiraceae_NK3A20_group and increased the abundance of Prevotella and Succiniclasticum. For archaea, the combination of 3-NOP and fumarate significantly increased the abundance of Methanobrevibacter_sp._AbM4, while the abundance of OTU581 (belongs to strain uncultured_rumen_methanogen_g__Methanobrevibacter) was significantly decreased. These results indecated that the combination of 3-NOP with fumarate could alleviate the accumulation of hydrogen and enhance the inhibition of methanogenesis compared with 3-NOP only in dairy cows. IMPORTANCE The global problem of climate change and the greenhouse effect has become increasingly severe, and the abatement of greenhouse gases has received great attention from the international community. Methane produced by ruminants during digestion not only aggravates the greenhouse effect, but also causes a waste of feed energy. As a methane inhibitor, 3-nitrooxypropanol can effectively reduce methane emission from ruminants. However, when it inhibits methane emission, the emission of hydrogen increases sharply, resulting in the waste of feed resources. Fumarate is a propionic acid precursor, which can promote the metabolism of hydrogen to propionic acid in animals. Therefore, we studied the effects of the combined addition of 3-nitrooxypropanol and fumarate on methanogenesis, rumen fermentation and rumen flora. It is of great significance to inhibit methane emission from ruminants and slow down the greenhouse effect.
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