Closing loops in intensive livestock systems: innovative strategies for nutrient recycling and emissions reduction DOI Creative Commons

Lluís Morey Gual

Published: Nov. 17, 2023

(English) The exponential growth of world population is leading to a high demand food products and, consequently, the development intensive agricultural and livestock systems. In this sense, synthetic fertilizers are being used in non-sustainable way produce feedstock, requiring massive amounts energy depleting mineral resources, with volatile fluctuation their prices due geopolitical conflicts. At same time, production still inefficient terms nutrient use contributes half amount greenhouse gases most ammonia emissions agriculture. context, recovery biobased bioenergy from animal manure partially replace fossil fuels, as well strategies reduce along management chain, should be considered key approach move towards more sustainable resilient agriculture production. This doctoral thesis has looked contribute aim by developing different innovative at two main levels: (i) level, precision feeding tools have been adjust diets dairy cows based on individual requirements, reducing nitrogen present excreta, potential volatilization ammonia. Nitrogen was reduced urine 28% 19% respectively without affecting milk production, reduction trend emission 20% during storage observed. Besides, samples cow ruminal fluid were obtained isolate identify hyper ammonia-producing bacteria that highly cows’ metabolism. After identification Clostridium sporogens, Terrisporobacter glycolicus (Clostridium glycolicum), Megasphaera elsdenii, argentinense, Streptococcus sp., Prevotella ruminicola, Acidaminococcus fermentans, an vitro study using bacteriophages isolated inoculated strategy. Unfortunately, none rumen able interact bacteria. (ii) treatment valorization agro-industrial anaerobic digestate, solid fraction mixture low stream stripping/scrubbing unit dried solar drying system, some cases combined acidification sulfuric acid, organic NPK fertilizers, while gas process. All products, both acidified non-acidified, meet current European Regulation for exceptions zinc content. Moreover, proved up 94% process when comparing non-acidified products. addition, resulting tested phytotoxicity germination plant pot trials lettuce. Except rest did not any toxicity effect germination, digestate showed biostimulator (Germination index > 120%). During trials, efficient performance, always lower than fertilizer, but similar case better negative control. them fit regulations heavy metals toxic elements soil edible parts plant. (Català) El creixement exponencial de la població mundial està portant una gran demanda productes alimentaris i, en conseqüència, al desenvolupament sistemes agrícoles i ramaders intensius. En aquest sentit, els fertilitzants sintètics s'estan utilitzant manera no sostenible per produir aliments matèries primeres, que requereixen quantitats massives d'energia esgoten recursos minerals, amb fluctuació volàtil dels seus preus conflictes geopolítics. Al mateix temps, ramaderia intensiva és encara ineficient pel fa l'ús nutrients contribueix meitat quantitat gasos d'efecte hivernacle majoria les d'amoníac l’agricultura. recuperació biològics bioenergia partir dejeccions animals substituir parcialment minerals combustibles fòssils, així com estratègies reduir llarg cadena gestió dejeccions, s'haurien considerar un enfocament clau avançar cap sistema més sostenible, agricultura producció ramadera resilients. Aquesta tesi ha volgut contribuir objectiu desenvolupant diferents innovadores dos nivells principals: A nivell animal, s'han utilitzat eines d'alimentació precisió ajustar dietes vaques lleteres funció necessitats individuals animals, reduint excretes possible volatilització l'amoníac. es va l'orina 19%, respectivament, sense afectar llet, observar tendència reducció del durant l'emmagatzematge dejeccions. més, van obtenir mostres líquid aïllar identificar bacteris híper-productors d’amoníac contribueixen substancialment el metabolisme vaques. Després identificació ruminicola fer estudi inocular bacteriòfags estratègia població. Malauradament, presents nostre poder interactuar bacteris. tractament valorització assecar digestat agroindustrial, fracció sòlida barreja corrent baixa procedent d’una unitat stripping d’assecat solar, alguns casos combinats acidificació àcid sulfúric, orgànics NPK, alhora reduïen d’efecte procés. Tots secs, tant acidificats acidificats, compliren Reglament europeu vigent sòlids algunes excepcions contingut zinc. l’acidificació demostrar fins procés comparar acidificats. Els resultants ser provats experiment germinació assajos test enciam determinar seva fitotoxicitat. Excepte sec acidificat, resta efecte toxicitat germinació, acidificat mostrar bioestimulador (índex Durant proves test, rendiment eficient, sempre inferior sintètic, però cas millor control negatiu. ells s’ajustaren normativa sobre metalls pesants potencialment tòxics sòl comestibles planta. (Español) crecimiento población está potenciando productos alimenticios y, consecuencia, desarrollo sistemas agrícolas y ganaderos intensivos. este sentido, los fertilizantes sintéticos se están utilizando forma para producir alimentos materias primas, requieren cantidades masivas energía agotan minerales, con fluctuación volátil sus precios por conflictos geopolíticos. mismo tiempo, ganadería todavía ineficiente lo refiere uso nutrientes contribuye mitad cantidad efecto invernadero ya mayoría las emisiones amoníaco agricultura. contexto, recuperación biológicos bioenergía estiércoles animales sustituir parcialmente minerales fósiles, así como estrategias reducir largo gestión estiércol, deberían enfoque clave avanzar hacia más producción ganadera resilientes. Esta tesis querido objetivo desarrollando diferentes innovadoras niveles principales: nivel han utilizado herramientas alimentación precisión dietas vacas lecheras función necesidades individuales animales, reduciendo nitrógeno presente excretas posible volatilización amoníaco. redujo orina heces respectivamente, sin leche, observó tendencia reducción durante almacenamiento estiércol. Además, obtuvieron muestras líquido aislar e bacterias híper-productoras contribuyen sustancialmente metabolismo vacas. Tras identificación realizó estudio inocularon bacteriófagos ruminal. Desgraciadamente, ninguno presentes nuestro pudo bacterias. tratamiento valorización secaron digestato fracción sólida mezcla corriente baja procedente unidad secado algunos combinados acidificación ácido sulfúrico, orgánicos tiempo reducían proceso. Todos secos, tanto acidificados acidificados, cumplieron Reglamento europeo vigente sólidos algunas excepciones contenido demostró hasta proceso acidificados. Los resultantes fueron probados experimento germinación ensayos maceta lechuga su fitotoxicidad. Excepto seco acidificado, resto produjeron ningún toxicidad t acidificado mostró (índice Durante pruebas mostraron rendimiento eficiente, siempre sintético pero caso mejor negativo. ellos ajustaron metales pesados elementos potencialmente tóxicos.

Language: Английский

Dry Reforming of Methane over Ni–Fe–Al Catalysts Prepared by Solution Combustion Synthesis DOI Creative Commons

Alua M. Manabayeva,

Päivi Mäki‐Arvela, Zuzana Vajglová

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2023, Volume and Issue: 62(29), P. 11439 - 11455

Published: July 18, 2023

Dry reforming of methane (DRM) is a promising method to utilize two greenhouse gases, such as CH4 and CO2, produce synthesis gas. In the current work, both monometallic Ni bimetallic Ni–Fe catalysts with different Fe/Ni molar ratios, synthesized by solution combustion (SCS) in DRM, were investigated using feed ratio CH4/CO2/Ar 1:1:1 at 600–900 °C. The characterized several physicochemical techniques X-ray diffraction (XRD), scanning electron microscopy energy-dispersive (SEM-EDX) spectroscopy, transmission (TEM), CHNS, N2 physisorption, H2-TPR, O2-TPO, NH3-TPD, thermogravimetric analysis (TGA). One highest hydrogen yields 81% was obtained 93% conversion 94% CO2 for 15Ni–5Fe–30Al catalyst, which contained, according XRD, NiAl2O4 spinel metallic phases. phase decomposed during reaction, while Ni3Fe alloy formed. Catalysts higher exhibited lower contained an inactive FeAl2O4 spinel. Rather stable CO H2 experiment 20 h time-on-stream.

Language: Английский

Citations

17

Roles of engineered lignocellulolytic microbiota in bioaugmenting lignocellulose biomethanation DOI
Bikram Basak, Ramesh Kumar, Rahul S. Tanpure

et al.

Renewable and Sustainable Energy Reviews, Journal Year: 2024, Volume and Issue: 207, P. 114913 - 114913

Published: Sept. 11, 2024

Language: Английский

Citations

8

Insect gut bacteria: a promising tool for enhanced biogas production DOI
Binoy Kumar Show, Sandipan Banerjee, Aishiki Banerjee

et al.

Reviews in Environmental Science and Bio/Technology, Journal Year: 2022, Volume and Issue: 21(1), P. 1 - 25

Published: Jan. 11, 2022

Language: Английский

Citations

28

Potential Substrates for Biogas Production through Anaerobic Digestion-An Alternative Energy Source DOI Creative Commons

Flaviana John Ngabala,

Jovine Kamuhabwa Emmanuel

Heliyon, Journal Year: 2024, Volume and Issue: 10(23), P. e40632 - e40632

Published: Nov. 26, 2024

Energy is a crucial part of comprehensive desire to reach any country's long-term economic and social development. Fossil fuels have for long time been used as the major global cause energy. However, dependence on fossil contributes environmental damage. Biogas generation from biodegradable organic materials potential sustainable substitute addressing energy supply inadequacy curbing challenges associated with fuels. Biotechnologies particularly anaerobic digestion technology are important process recovery materials. comes bio-decomposition various substrates trash. Human excreta, agricultural wastes, industrial food residues, municipal wastes fishery aquatic plants forest residues among common which biogas produced today. Properly designed systems play role in renewable production, providing electricity, heating, lighting waste that would otherwise go landfill. These convert waste, livestock manure, even crops into biogas, can be power generators, provide heat cooking, or light homes. In urban remote areas, digesters offer clean, alternative solutions not only meet local demands but also enhance living conditions by reducing reliance expensive polluting sources. For instance, households save costs improve air quality using cooking instead traditional Besides, implementation significantly mitigate impact lowering greenhouse gas emissions, promoting practices supporting circular economy. This review explores diverse range highlighting their viability alternatives fuel-based sources emphasizing multifaceted benefits they communities.

Language: Английский

Citations

5

Composition, structure, and functional shifts of prokaryotic communities in response to co-composting of various nitrogenous green feedstocks DOI Creative Commons
Felix Matheri,

Anne Kelly Kambura,

M. Mwangi

et al.

BMC Microbiology, Journal Year: 2023, Volume and Issue: 23(1)

Published: March 2, 2023

Thermophilic composting is a promising method of sanitizing pathogens in manure and source agriculturally important thermostable enzymes microorganisms from organic wastes. Despite the extensive studies on compost prokaryotes, shifts microbial profiles under influence various green materials days are still not well understood, considering complexity material sources. Here, effect regimens diversity, abundance, metabolic capacity prokaryotic communities thermophilic environment was examined.Total community 16S rRNA recovered triplicate samples Lantana-based, Tithonia-based, Grass-based, mixed (Lantana + Tithonia Grass)- based at 21, 42, 63, 84 composting. The sequenced using Illumina Miseq platform. Bioinformatics analysis done Divisive Amplicon Denoising Algorithm version 2 (DADA2) R 4.1 Phylogenetic Investigation Communities by Reconstruction Unobserved States (PICRUSt2) pipelines for structure profiles, respectively. In DADA2, classification Refseq-ribosomal database project (RDP) SILVA 138 databases.Our results showed apparent differences total diversity abundance within four days. study that most prevalent phyla during included Acidobacteriota, Actinobacteriota, Bacteroidota, Chloroflexi, Proteobacteria. Additionally, there were overall pathways but no significant among treatments major like carbohydrate biosynthesis, degradation, nitrogen biosynthesis.Various sources affect succession nutrients communities. similarity amounts nutrients, such as Nitrogen, end process, despite feedstock material, indicates stability

Language: Английский

Citations

13

Microbial Fuel Cells for Sustainable Biofuel Production: Cutting-edge Technology DOI Creative Commons
Gamachis Korsa, Gessesse Kebede Bekele,

Abera Beyene

et al.

Green Energy and Environmental Technology, Journal Year: 2025, Volume and Issue: 4

Published: Feb. 28, 2025

As of 2023, coal, oil, and natural gas, which are non-renewable fossil fuels, account for about 80% the world’s energy consumption. This underscores pressing necessity alternative sources in light worsening climate crisis. Apart from problems, this review evaluates potential microbial fuel cells biofuel production, contributes to just 10–20% total consumption due its relatively low environmental impact. The aim systematic is elucidate their role producing a range bio-based including biogas, biodiesel, bioethanol, biobutanol. findings categorized into ten main areas: biomass conversion techniques, substrates strains, design components cells, strain improvement through metabolic engineering, enhancements nanomaterials advantages disadvantages biofuels, integration biorefineries, applications, challenges limitations, future trends cell technology. also promise as sustainable eco-friendly option bioenergy emphasizing need advancements efficiency compete with conventional fuels. Harnessing innovative strategies pertaining technology (MFCs) can potentially transform generation more commercially viable practice, positively impacting conservation public health.

Language: Английский

Citations

0

Effect of thermal and NaOH pretreatment on water hyacinth to enhance the biogas production DOI
Binoy Kumar Show,

Gaayathri Shivakumaran,

Apurba Koley

et al.

Environmental Science and Pollution Research, Journal Year: 2023, Volume and Issue: 30(57), P. 120984 - 120993

Published: Nov. 10, 2023

Language: Английский

Citations

7

Exploring the potential of insect gut microbes for advancing renewable energy production DOI
Chun Fu, Assar Ali Shah, Mohammed Alissa

et al.

Journal of Applied Entomology, Journal Year: 2024, Volume and Issue: unknown

Published: June 10, 2024

Abstract Insect gut microbes represent a rich source of enzymes and metabolic pathways that can be harnessed to advance renewable energy production. This review explores the potential insect microbiota in context biomass degradation biofuel Insects, particularly wood‐feeding species like termites beetles, harbour complex microbial communities their guts efficiently break down lignocellulosic materials into simple sugars. These sugars then fermented biofuels such as ethanol methane. Recent research has focused on identifying key involved this process, well engineering these enhance efficiency substrate specificity. Additionally, ecological roles digestion for biotechnological applications beyond production are discussed. Overall, understanding harnessing holds great promise advancing sustainable solutions.

Language: Английский

Citations

2

Multicomponent assessment and optimization of the cellulase activity by Serratia marcescens inhabiting decomposed leaf litter soil DOI

H.K. Narendra Kumar,

N. Chandra Mohana,

D. Rakshith

et al.

Sustainable Chemistry and Pharmacy, Journal Year: 2022, Volume and Issue: 31, P. 100951 - 100951

Published: Dec. 28, 2022

Language: Английский

Citations

11

Biomass conversion through optimization of cellulase from Chryseobacterium junjuense Bp17 and their utility in bioethanol production DOI

Narendra Kumar H.K.,

N. Chandra Mohana,

H C Amrutha

et al.

Energy, Journal Year: 2023, Volume and Issue: 283, P. 129187 - 129187

Published: Sept. 24, 2023

Language: Английский

Citations

6