Sökning: "microbial population"

Visar resultat 11 - 15 av 35 uppsatser innehållade orden microbial population.

  1. 11. Anaerobic Co-digestion of steam pretreated wheat straw and sewage sludge

    Master-uppsats, Lunds universitet/Bioteknik (master); Lunds universitet/Bioteknik (CI)

    Författare :Virginia Tosi; [2021]
    Nyckelord :Anaerobic co-digestion; wheat straw pretreatment; nutrients availability; OLR; VFA acumulation; Biotechnology; Technology and Engineering;

    Sammanfattning : Anaerobic digestion (AD) of wastes and residues is a widely applied and explored process. However, when the process is not optimized, inadequate concentrations of nutrients and inhibitory compounds are common and can lead to low maximum organic loading rates and increased risk of process problems, low organic dry solids degradation rate and reduced methane yields. LÄS MER

  3. 12. Relating the impacts of regenerative farming practices to soil health and carbon sequestration on Gotland, Sweden

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Laerke Daverkosen; Alena Holzknecht; [2021]
    Nyckelord :regenerative agriculture; soil health; carbon sequestration; Gotland Sweden ;

    Sammanfattning : Land degradation, greenhouse gas emissions and biodiversity loss through agriculture are some of the greatest challenges we are facing today. Fertile and productive soils are the basis of life on this planet and need to be protected and restored to support a growing population and lower negative impacts of climate change. LÄS MER

  4. 13. Effects of wild boar (Sus scrofa) on soil processes and tree growth

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Andreas Lundgren; [2021]
    Nyckelord :Wild boars; soil processes; tree growth; Vildsvin; markprocesser; trädtillväxt;

    Sammanfattning : Wild boars (Sus scrofa) have increased rapidly in population size and home range since their reintroduction to the Swedish fauna. Through their rooting behaviour, the boars can cause great disturbance to the ecosystem. LÄS MER

  5. 14. Stabilizing biogas processes at high ammonia : effects of acetate pulse-feeding on the microbial population

    Master-uppsats, SLU/Department of Molecular Sciences

    Författare :Oscar Dolk; [2020]
    Nyckelord :biogas; anaerobic digestion; ammonia inhibition; acetate enrichment;

    Sammanfattning : This study investigated the problem of ammonia inhibition in biogas reactors, commonly occurring when protein rich substrates are used in anaerobic digestion processes. Ammonia inhibition is one of the foremost causes of failure in anaerobic digestion, leading to process instability, with symptoms commonly expressed as; reduction in biogas produced, decreased methane content in the gas and accumulation of volatile fatty acids. LÄS MER

  7. 15. Co-occurrence network analysis of biogas reactor microbiomes based on metagenomics sequencing data

    Master-uppsats, SLU/Dept. of Animal Breeding and Genetics

    Författare :Youwei Huan; [2020]
    Nyckelord :Co-occurrence network; Metagenomics; Anaerobic digestion;

    Sammanfattning : Metagenome sequencing makes it possible to capture microbial communities in their diversity, to investigate population structures and evolutionary relationships, and to predict metabolic functions and interactions within the microbial community and with the environment. Metagenomics thus, significantly expands the research scope of microbiology. LÄS MER