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1. Invited review: Sensor technologies for real-time monitoring of the rumen environment

Author:
Chan Su Han; Upinder Kaur; Huiwen Bai; Barbara Roqueto dos Reis; Robin White; Robert A. Nawrocki; Richard M. Voyles; Min Gyu Kang; Shashank Priya
Source:
Journal of dairy science 2022 v.105 no.8 pp. 6379-6404
ISSN:
0022-0302
Subject:
volatile fatty acids,   etc   ; dairy science; histamine; livestock; metabolism; pH; temperature;     Show all 7 Subjects
Abstract:
... Quantifying digestive and fermentative processes within the rumen environment has been the subject of decades of research; however, our existing research methodologies preclude time-sensitive and spatially explicit investigation of this system. To better understand the temporal and spatial dynamics of the rumen environment, real-time and in situ monitoring of various chemical and physical paramete ...
DOI:
10.3168/jds.2021-20576

2. Novel approach to ammonia recovery from anaerobic digestion via side-stream stripping at multiple pH levels

Author:
Advait Palakodeti; Parveen Fatemeh Rupani; Samet Azman; Raf Dewil; Lise Appels
Source:
Bioresource technology 2022 v.361 pp. 127685
ISSN:
0960-8524
Subject:
volatile fatty acids,   etc   ; ammonia; anaerobic digestion; biogas; methane; nitrogen; pH; solubilization;     Show all 8 Subjects
Abstract:
... Ammonia recovery from anaerobic digesters via side-stream stripping is a technique to recover nitrogen from manure wastes. This study demonstrated a novel approach to determining ammonia recovery to maintain total ammonia concentrations in the digester in the range of 1.7–2.1 gN/L. Increasing the pH during stripping from 8, 8.5 to 9.5 did not affect the stability of the digester. Methane yields of ...
DOI:
10.1016/j.biortech.2022.127685

3. Biomethane enhancement using reduced graphene oxide in anaerobic digestion of municipal solid waste

Author:
Hamdi Muratçobanoğlu; Öznur Begüm Gökçek; Fatma Muratçobanoğlu; Ruhullah Ali Mert; Sevgi Demirel
Source:
Bioresource technology 2022 v.354 pp. 127163
ISSN:
0960-8524
Subject:
volatile fatty acids,   etc   ; Archaea; anaerobic digestion; biogas; graphene oxide; municipal solid waste;     Show all 6 Subjects
Abstract:
... The present research investigated the impact of reduced graphene oxide (rGO) addition on the semi-continuous anaerobic digestion of the organic fraction of municipal solid waste (OFMSW) in the range of 0.5–10 gVolatileSolid(VS)/Lᵣₑₐcₜₒᵣday organic loading rates (OLR). Adding rGO enhanced the rate and yield of biomethane production, and the maximum biomethane increment rate was obtained as 110% at ...
DOI:
10.1016/j.biortech.2022.127163

4. High-Gossypol Whole Cottonseed Exhibited Mediocre Rumen Degradability and Less Microbial Fermentation Efficiency than Cottonseed Hull and Cottonseed Meal with an In Vitro Gas Production Technique

Author:
Weikang Wang; Qichao Wu; Wenjuan Li; Yanlu Wang; Fan Zhang; Liangkang Lv; Shengli Li; Hongjian Yang
Source:
Fermentation 2022 v.8 no.3 pp. -
ISSN:
2311-5637
Subject:
volatile fatty acids,   etc   ; acetates; ammonium nitrogen; automation; cottonseed; cottonseed meal; energy; fermentation; gossypol;     Show all 9 Subjects
Abstract:
... To explore whether or not the gossypol varied in cottonseed by-products affect rumen degradability and fermentation efficiency, an in vitro cumulative gas production experiment was applied with mixed rumen microorganism to compare rumen fermentation characteristics of whole cottonseed (WCS, n = 3 samples), cottonseed meal (CSM, n = 3 samples), and cottonseed hull (CSH, n = 2 samples). The five-rep ...
DOI:
10.3390/fermentation8030103

5. Application of biochar and alkalis for recovery of sour anaerobic digesters

Author:
Natthiporn Aramrueang; Ruihong Zhang; Xiaoge Liu
Source:
Journal of environmental management 2022 v.307 pp. 114538
ISSN:
0301-4797
Subject:
volatile fatty acids,   etc   ; biochar; calcium hydroxide; environmental management; methane production; sodium hydroxide; wastes;     Show all 7 Subjects
Abstract:
... Commercial digesters handling complex waste and organic overloading often encounter unbalanced conditions or failures. With limited studies on the digester recovery from an industry-based waste stream, a complex and high-strength digestate containing up to 79 g COD l⁻¹ from acidified commercial digester was investigated for biochar and alkaline treatments. The addition of biochar and calcium hydro ...
DOI:
10.1016/j.jenvman.2022.114538

6. Design and evaluation of gas fermentation systems for CO2 reduction to C2 and C4 fatty acids: Non-genetic metabolic regulation with pressure, pH and reaction time

Author:
Ranaprathap Katakojwala; Athmakuri Tharak; Omprakash Sarkar; S Venkata Mohan
Source:
Bioresource technology 2022 v.351 pp. 126937
ISSN:
0960-8524
Subject:
volatile fatty acids,   etc   ; atmospheric pressure; carbon dioxide; fermentation; headspace analysis; inorganic carbon; pH;     Show all 7 Subjects
Abstract:
... Addressing the carbon emissions through microbial mediated fermentation is an emerging interest. Custom designed and fabricated gas fermentation (GF) systems were evaluated to optimize the headspace pressure, pH (6.5, 7.5, and 8.5), fermentation time, and substrate concentration by employing enriched homoacetogenic chemolithoautotrophs in non-genetic approach. Headspace pressure showed marked infl ...
DOI:
10.1016/j.biortech.2022.126937

7. Hydroxy‐selenomethionine supplementation promotes the in vitro rumen fermentation of dairy cows by altering the relative abundance of rumen microorganisms

Author:
Yuhui Zheng; Tengfei He; Tian Xie; Jidong Wang; Zhantao Yang; Xiaoge Sun; Wei Wang; Shengli Li
Source:
Journal of applied microbiology 2022 v.132 no.4 pp. 2583-2593
ISSN:
1364-5072
Subject:
volatile fatty acids,   etc   ; Holstein; Prevotella; fermentation; propionic acid; selenium; sodium selenite; species richness;     Show all 8 Subjects
Abstract:
... AIMS: This study aims to investigate the effect of hydroxy‐selenomethionine supplementation on the in vitro rumen fermentation characteristics and microorganisms of Holstein cows. METHODS AND RESULTS: Five fermentation substrates, including control (without selenium supplementation, CON), sodium selenite supplementation (0.3 mg kg⁻¹ DM, SS03), and hydroxy‐selenomethionine supplementation (0.3, 0.6 ...
DOI:
10.1111/jam.15392

8. Chicken manure-based bioponics: Effects of acetic acid supplementation on nitrogen and phosphorus recoveries and microbial communities

Author:
Sumeth Wongkiew; Chongrak Polprasert; Thammarat Koottatep; Tawan Limpiyakorn; K.C. Surendra; Samir Kumar Khanal
Source:
Waste management 2022 v.137 pp. 264-274
ISSN:
0956-053X
Subject:
volatile fatty acids,   etc   ; acetic acid; chickens; crop production; genes; nitrogen; phosphorus; poultry manure; waste management;     Show all 9 Subjects
Abstract:
... Bioponics has the potential to recover nutrients from organic waste streams, such as chicken manure and digestate with high volatile fatty acid (VFA) contents through crop production. Acetic acid, a dominant VFA, was supplemented weekly (0, 500, 1000, and 1500 mg/L) in a chicken manure-based bioponic system, and its effect on the performance of bioponics (e.g., plant yield and nitrogen and phospho ...
DOI:
10.1016/j.wasman.2021.11.023

9. Long-term alkaline volatile fatty acids production from waste streams: Impact of pH and dominance of Dysgonomonadaceae

Author:
Isaac Owusu-Agyeman; Elzbieta Plaza; Zeynep Cetecioglu
Source:
Bioresource technology 2022 v.346 pp. 126621
ISSN:
0960-8524
Subject:
volatile fatty acids,   etc   ; Bacillaceae; acetic acid; fermentation; microbial communities; organic wastes; pH; propionic acid; sludge;     Show all 9 Subjects
Abstract:
... Alkaline co-fermentation of primary sludge and external organic waste (OW) was studied to elucidate the influence of substrate ratios and long-term system robustness and microbial community dynamics using batch and semi-continuous reactors. Volatile fatty acid (VFA) production increased with increasing OW fraction in the substrate due to synergistic effects of co-degradation. VFA production at pH ...
DOI:
10.1016/j.biortech.2021.126621

10. Novel application of pyrolytic carbon generated from waste tires: Hydrolytic and methanogenic performance promotion in vinegar residue anaerobic digestion

Author:
Xin Kong; Jianan Niu; Mingkai Li; Xiuping Yue; Qiang Zhang; Wenjing Zhang; Jianguo Liu; Jin Yuan; Xia Li
Source:
Waste management 2022 v.143 pp. 15-22
ISSN:
0956-053X
Subject:
volatile fatty acids,   etc   ; activated carbon; anaerobic digestion; inoculum; methane production; methanogens; pyrolysis; vinegars; waste management;     Show all 9 Subjects
Abstract:
... Random disposal of waste tires and vinegar residues is deleterious to the environment; these materials can be sufficiently treated using pyrolysis and anaerobic digestion, respectively. In this study, pyrolytic carbon was used to enhance the performance of the anaerobic digestion of vinegar residues, which is a much more economic method comparing with dosing commercial-level carbon based materials ...
DOI:
10.1016/j.wasman.2022.02.023

11. Bioaugmentation with a propionate-degrading methanogenic culture to improve methane production from chicken manure

Author:
Ying Li; Changrui Wang; Xinrui Xu; Yongming Sun; Tao Xing
Source:
Bioresource technology 2022 v.346 pp. 126607
ISSN:
0960-8524
Subject:
volatile fatty acids,   etc   ; Methanobacterium; Syntrophobacter; ammonia; ammonium nitrogen; anaerobic digestion; bioaugmentation; methane production; methanogens; poultry manure;     Show all 10 Subjects
Abstract:
... Volatile fatty acid (VFA) accumulation caused by high ammonia concentrations is often encountered during the anaerobic digestion (AD) of ammonia-rich substrates. In this study, propionate-degrading methanogenic cultures were introduced to augment the semi-continuous AD of chicken manure under high ammonia levels. Introduction of a methanogenic culture enhanced the methane yield in the bioaugmented ...
DOI:
10.1016/j.biortech.2021.126607

12. Kinetics and Reactor Design Principles of Volatile Fatty Acid Ketonization for Sustainable Aviation Fuel Production

Author:
Jacob H. Miller; Glenn R. Hafenstine; Hannah H. Nguyen; Derek R. Vardon
Source:
Industrial & engineering chemistry process design and development 2022 v.61 no.8 pp. 2997-3010
ISSN:
1520-5045
Subject:
volatile fatty acids,   etc   ; alkanes; carbon dioxide; chemistry; commercialization; coproducts; fuel production; hexanoic acid; process design; streams;     Show all 10 Subjects
Abstract:
... Ketonization of wet waste-derived carboxylic acids (volatile fatty acids, VFAs) constitutes the first step of a process to catalytically upgrade VFAs to an alkane sustainable aviation fuel blendstock. VFA ketonization has been demonstrated at near-theoretical yields at the lab scale, and robust operation of industrial-scale ketonization reactors is essential for the commercialization of VFA upgrad ...
DOI:
10.1021/acs.iecr.1c04548

13. Effects of temperature and total solid content on biohydrogen production from dark fermentation of rice straw: Performance and microbial community characteristics

Author:
Hong Chen; Jun Wu; Rong Huang; Wenzhe Zhang; Weining He; Zhengyu Deng; Yunping Han; Benyi Xiao; Hongmei Luo; Wei Qu
Source:
Chemosphere 2022 v.286 pp. 131655
ISSN:
0045-6535
Subject:
volatile fatty acids,   etc   ; biohydrogen; butyric acid; fermentation; hydrogen production; methane production; microbial communities; pH; rice straw; temperature;     Show all 10 Subjects
Abstract:
... Semi-continuous experiments were carried out in lab-scale continuous stirred tank reactors to evaluate the effects of fermentation temperature (37 ± 1 °C and 55 ± 1 °C) and total solids (TS) contents (3 %, 6 %, and 12 %) on biohydrogen production from the dark fermentations (DF) of rice straw (RS) and the total operation duration was 105 days. The experimental results show that biohydrogen product ...
DOI:
10.1016/j.chemosphere.2021.131655

14. Amino Acid Configuration Affects Volatile Fatty Acid Production during Proteinaceous Waste Valorization: Chemotaxis, Quorum Sensing, and Metabolism

Author:
Meng Wang; Xuemeng Zhang; Haining Huang; Zhiyi Qin; Chao Liu; Yinguang Chen
Source:
Environmental science & technology 2022 v.56 no.12 pp. 8702-8711
ISSN:
1520-5851
Subject:
volatile fatty acids,   etc   ; Clostridium; amino acids; bioreactors; biotransformation; chemotaxis; fermentation; kitchen waste; metagenomics; oxidoreductases; protein synthesis; transportation;     Show all 12 Subjects
Abstract:
... During proteinaceous waste valorization to produce volatile fatty acids (VFAs), protein needs to be hydrolyzed to amino acids (AAs), but the effects of the configuration of AAs on their biotransformation and VFA production have not been investigated. In this study, more residual d-AAs than their corresponding l-AAs were observed after VFAs were produced from kitchen waste in a pilot-scale bioreact ...
DOI:
10.1021/acs.est.1c07894

15. Nickel-loaded shrimp shell biochar enhances batch anaerobic digestion of food waste

Author:
Xiao Li; Mingxuan Wu; Yingwen Xue
Source:
Bioresource technology 2022 v.352 pp. 127092
ISSN:
0960-8524
Subject:
volatile fatty acids,   etc   ; Methanosaeta; Methanosarcina; anaerobic digestion; biochar; food waste; hydrolysis; methane; methane production; nickel; shrimp shells;     Show all 11 Subjects
Abstract:
... This study evaluated the effectiveness of shrimp shell biochar (SBC) and nickel (Ni) loaded SBC in increasing methane yield during anaerobic digestion of food waste. The results indicated that the methane yields of control (without SBC), SBC, SBC loaded with the low concentration of Ni, and SBC loaded with the high concentration of Ni were 81.8, 116.1, 134.7, and 99.2 mL/(g·VS), respectively. SBC ...
DOI:
10.1016/j.biortech.2022.127092

16. Transiting from the inhibited steady-state to the steady-state through the ammonium bicarbonate mediation in the anaerobic digestion of low-C/N-ratio food wastes

Author:
Tianwei Hao; Yihang Xiao; Sunita Varjani
Source:
Bioresource technology 2022 v.351 pp. 127046
ISSN:
0960-8524
Subject:
volatile fatty acids,   etc   ; Methanosaeta; Methanosarcina; acetates; ammonium; ammonium bicarbonate; anaerobic digestion; food waste; metabolism; methane production; methanogens; oxidation;     Show all 12 Subjects
Abstract:
... The current study aimed to determine the effects of NH₄⁺ on anaerobic digestion (AD) metabolism and the feasibility of using NH₄HCO₃ to improve methane production in an AD system when treating a low-C/N-ratio food waste (FW). Increasing the ammonium concentration (500–1000 mg NH₄Cl-N/L) added into the AD system did not limit the methane production but caused the volatile fatty acid (VFA) accumulat ...
DOI:
10.1016/j.biortech.2022.127046

17. Effect of biochar derived from biogas residue on methane production during dry anaerobic fermentation of kitchen waste

Author:
Dongyang Li; Mengyang Sun; Jianfeng Xu; Tiancheng Gong; Meiying Ye; Yi Xiao; Tianxue Yang
Source:
Waste management 2022 v.149 pp. 70-78
ISSN:
0956-053X
Subject:
volatile fatty acids,   etc   ; acetates; acidification; biochar; biogas; fermentation; hydrolysis; kitchen waste; methane; methane production; methanogens; oxidation; waste management;     Show all 13 Subjects
Abstract:
... Kitchen wastes (KW) dramatically increasing with population and economy enhancing, and dry anaerobic fermentation was used to treat it. However, the large amount of biogas residue severely restricted the application of dry anaerobic fermentation, because the high total solid might lead to the system failure. Therefore, it is urgent to find appropriate way to improve the efficiency of dry anaerobic ...
DOI:
10.1016/j.wasman.2022.06.006

18. Unravelling capability of two-stage thermophilic anaerobic membrane bioreactors for high organic loading wastewater: Effect of support media addition and irreversible fouling

Author:
K. Hanvajanawong; B. Suyamud; B.B. Suwannasilp; J. Lohwacharin; C. Visvanathan
Source:
Bioresource technology 2022 v.348 pp. 126725
ISSN:
0960-8524
Subject:
volatile fatty acids,   etc   ; Clostridia; Methanosaeta; chemical oxygen demand; fatty acid composition; membrane bioreactors; methanogens; polyvinyl alcohol; ultrafiltration; wastewater;     Show all 10 Subjects
Abstract:
... This study investigated the effects of adding polyvinyl alcohol (PVA) beads on the performance of methanogenic reactors and the fouling behavior of a two-stage thermophilic anaerobic membrane bioreactor (ThAnMBR) for treating wastewater at a feed chemical oxygen demand (COD) of 10 g/L. The PVA-added methanogenic reactor exhibited stable operation performance and offered a relatively low volatile f ...
DOI:
10.1016/j.biortech.2022.126725

19. Anaerobic co-digestion of cattle rumen content and food waste for biogas production: Establishment of co-digestion ratios and kinetic studies

Author:
Newton A. Ihoeghian; Andrew N. Amenaghawon; Mike U. Ajieh; Cyprian E. Oshoma; Abraham Ogofure; Nosakhare O. Erhunmwunse; Valerie I.O. Edosa; Isioma Tongo; Ifeyinwa S. Obuekwe; Ebuwa S. Isagba; Christopher Emokaro; Lawrence I.N. Ezemonye; Alfonso J. Lag-Brotons; Kirk T. Semple; Alastair D. Martin
Source:
Bioresource technology reports 2022 v.18 pp. 101033
ISSN:
2589-014X
Subject:
volatile fatty acids,   etc   ; ammonium nitrogen; anaerobic digestion; biogas; carbon nitrogen ratio; cattle; food waste; gas production (biological); models; pH;     Show all 10 Subjects
Abstract:
... This study investigated the batch co-digestion of cattle rumen content (CRC) and food waste (FW) for biogas production in different ratios (CRC:FW) to assess biogas production and process stability. The results showed that CRC and FW possess characteristics that are desirable for biogas production as seen in their respective total solids (10.85 and 26.53%), volatile solids (89 and 86.83%) and carb ...
DOI:
10.1016/j.biteb.2022.101033

20. Complex network analysis of slaughterhouse waste anaerobic digestion: from failure to success of long-term operation

Author:
Tergel Dalantai; Chaeyoung Rhee; Dae Wook Kim; Sung Il Yu; Juhee Shin; Jin Mi Triolo; Seung Gu Shin
Source:
Bioresource technology 2022 pp. 127673
ISSN:
0960-8524
Subject:
volatile fatty acids,   etc   ; ammonia; ammonium nitrogen; anaerobic digestion; carbon; feedstocks; gas production (biological); lignocellulose; liver; methanogens; pork; slaughterhouse wastes;     Show all 12 Subjects
Abstract:
... The study explored slaughterhouse waste (SHW) as prime feedstock associated with and without supplement of an external slowly degradable lignocellulosic carbon source to overcome the synergistic co-inhibitions of ammonia and fatty acids. Long-term solid-state digestion (SSD) and liquid-state digestion (LSD) were investigated using a mixture of pork liver and fat. At 2.0 g volatile solids (VS) L⁻¹ ...
DOI:
10.1016/j.biortech.2022.127673